{"id":6503,"date":"2026-08-14T16:42:13","date_gmt":"2026-08-14T08:42:13","guid":{"rendered":"https:\/\/www.mywaytool.com\/?p=6503"},"modified":"2026-08-14T16:44:43","modified_gmt":"2026-08-14T08:44:43","slug":"the-difference-between-flat-washer-and-spring-washer","status":"publish","type":"post","link":"https:\/\/www.myway-metal.com\/index.php\/2026\/08\/14\/the-difference-between-flat-washer-and-spring-washer\/","title":{"rendered":"The Difference Between Flat Washer And Spring Washer"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"6503\" class=\"elementor elementor-6503\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1f82a924 e-con-full e-flex e-con e-parent\" data-id=\"1f82a924\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-480815fd elementor-widget elementor-widget-breadcrumbs\" data-id=\"480815fd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"breadcrumbs.default\">\n\t\t\t\t\t<p id=\"breadcrumbs\"><span><span><a href=\"https:\/\/www.myway-metal.com\/\">Home<\/a><\/span><\/span><\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6a99742e e-con-full e-flex e-con e-parent\" data-id=\"6a99742e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-765117c5 e-con-full e-flex e-con e-child\" data-id=\"765117c5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-41454ac0 e-con-full e-flex e-con e-child\" data-id=\"41454ac0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2ada11ce elementor-grid-1 elementor-posts--thumbnail-none elementor-grid-tablet-2 elementor-grid-mobile-1 elementor-widget elementor-widget-posts\" data-id=\"2ada11ce\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;classic_columns&quot;:&quot;1&quot;,&quot;classic_columns_tablet&quot;:&quot;2&quot;,&quot;classic_columns_mobile&quot;:&quot;1&quot;,&quot;classic_row_gap&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:35,&quot;sizes&quot;:[]},&quot;classic_row_gap_laptop&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;classic_row_gap_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;classic_row_gap_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"posts.classic\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-posts-container elementor-posts elementor-posts--skin-classic elementor-grid\" role=\"list\">\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-7135 post type-post status-publish format-standard has-post-thumbnail hentry category-fastener\" role=\"listitem\">\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/www.myway-metal.com\/index.php\/2026\/08\/18\/reuse-of-fasteners-a-sustainable-solution-in-modern-construction\/\" >\n\t\t\t\tReuse of Fasteners: A Sustainable Solution in Modern Construction\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>Reusing fasteners is a practical and sustainable solution to reduce construction waste and environmental impact. As challenges exist in different\t\t<\/div>\n\t\t\n\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/www.myway-metal.com\/index.php\/2026\/08\/18\/reuse-of-fasteners-a-sustainable-solution-in-modern-construction\/\" aria-label=\"Read more about Reuse of Fasteners: A Sustainable Solution in Modern Construction\" tabindex=\"-1\" >\n\t\t\tRead More \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-7126 post type-post status-publish format-standard has-post-thumbnail hentry category-fastener\" role=\"listitem\">\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/www.myway-metal.com\/index.php\/2026\/08\/18\/the-hidden-threat-of-fastener-fatigue\/\" >\n\t\t\t\tThe Hidden Threat of Fastener Fatigue\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>Fastener fatigue is a phenomenon that occurs when a fastener undergoes repeated cycles of stress over time which is common\t\t<\/div>\n\t\t\n\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/www.myway-metal.com\/index.php\/2026\/08\/18\/the-hidden-threat-of-fastener-fatigue\/\" aria-label=\"Read more about The Hidden Threat of Fastener Fatigue\" tabindex=\"-1\" >\n\t\t\tRead More \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-7117 post type-post status-publish format-standard has-post-thumbnail hentry category-fastener\" role=\"listitem\">\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/www.myway-metal.com\/index.php\/2026\/08\/18\/dangers-of-fastener-embrittlement\/\" >\n\t\t\t\tDangers of Fastener Embrittlement\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>Understanding the threats that can risk the integrity of components in structures such as fastener embrittlement can lead to preventing\t\t<\/div>\n\t\t\n\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/www.myway-metal.com\/index.php\/2026\/08\/18\/dangers-of-fastener-embrittlement\/\" aria-label=\"Read more about Dangers of Fastener Embrittlement\" tabindex=\"-1\" >\n\t\t\tRead More \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-7108 post type-post status-publish format-standard has-post-thumbnail hentry category-fastener\" role=\"listitem\">\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/www.myway-metal.com\/index.php\/2026\/08\/18\/the-future-of-smart-fasteners\/\" >\n\t\t\t\tThe Future of Smart Fasteners\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>The future of using smart fasteners in manufacturing, construction, and other industries has a bright potential to enhance the functionality\t\t<\/div>\n\t\t\n\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/www.myway-metal.com\/index.php\/2026\/08\/18\/the-future-of-smart-fasteners\/\" aria-label=\"Read more about The Future of Smart Fasteners\" tabindex=\"-1\" >\n\t\t\tRead More \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-7099 post type-post status-publish format-standard has-post-thumbnail hentry category-fastener\" role=\"listitem\">\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/www.myway-metal.com\/index.php\/2026\/08\/18\/high-performance-fasteners-for-aerospace\/\" >\n\t\t\t\tHigh-Performance Fasteners for Aerospace\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>As technology advances and materials continue to evolve, the aerospace industry rely on innovative fastener solutions to meet the growing\t\t<\/div>\n\t\t\n\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/www.myway-metal.com\/index.php\/2026\/08\/18\/high-performance-fasteners-for-aerospace\/\" aria-label=\"Read more about High-Performance Fasteners for Aerospace\" tabindex=\"-1\" >\n\t\t\tRead More \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-7090 post type-post status-publish format-standard has-post-thumbnail hentry category-uncategorized\" role=\"listitem\">\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/www.myway-metal.com\/index.php\/2026\/08\/18\/fastener-testing-and-quality-control\/\" >\n\t\t\t\tFastener Testing and Quality Control\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>For some applications that require intricate and reliable fastener devices like automotive, aerospace, and construction, safety is a paramount detail\t\t<\/div>\n\t\t\n\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/www.myway-metal.com\/index.php\/2026\/08\/18\/fastener-testing-and-quality-control\/\" aria-label=\"Read more about Fastener Testing and Quality Control\" tabindex=\"-1\" >\n\t\t\tRead More \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/article>\n\t\t\t\t<\/div>\n\t\t\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3b178833 elementor-button-align-stretch elementor-widget elementor-widget-form\" data-id=\"3b178833\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;step_next_label&quot;:&quot;Next&quot;,&quot;step_previous_label&quot;:&quot;Previous&quot;,&quot;button_width&quot;:&quot;100&quot;,&quot;step_type&quot;:&quot;number_text&quot;,&quot;step_icon_shape&quot;:&quot;circle&quot;}\" data-widget_type=\"form.default\">\n\t\t\t\t\t\t\t<form class=\"elementor-form\" method=\"post\" name=\"New Form\" aria-label=\"New 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id=\"form-field-field_4e2b07a\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"WhatsApp\/Tel\" pattern=\"[0-9()#&amp;+*-=.]+\" title=\"Only numbers and phone characters (#, -, *, etc) are accepted.\">\n\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-textarea elementor-field-group elementor-column elementor-field-group-message elementor-col-100 elementor-field-required\">\n\t\t\t\t\t<textarea class=\"elementor-field-textual elementor-field  elementor-size-sm\" name=\"form_fields[message]\" id=\"form-field-message\" rows=\"4\" placeholder=\"Message*\" required=\"required\"><\/textarea>\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-group elementor-column elementor-field-type-submit elementor-col-100 e-form__buttons\">\n\t\t\t\t\t<button class=\"elementor-button elementor-size-sm\" type=\"submit\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Send<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/button>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/form>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7664f888 e-con-full e-flex e-con e-child\" data-id=\"7664f888\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-71c919a0 elementor-widget elementor-widget-heading\" data-id=\"71c919a0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">The Difference Between Flat Washer And Spring Washer<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6737753 elementor-widget elementor-widget-text-editor\" data-id=\"6737753\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Flat washer<\/strong><\/p><p>The flat washer is used as a part to prevent the bolt and nut from locking. Flat washers are used where fasteners are used. How to choose a suitable flat washer? Flat washer is a kind of flat washer, which mainly makes the contact area of screws and some large equipment increase and tighten. When using flat washer, it is often suitable for nuts and nuts to cooperate with each other. When storing flat washer, it must be in the most effective sealing time, and has the necessary important characteristics:<\/p><p>1, in the case of harsh environment, it should be said to seal the flat washer, when a certain temperature and pressure in the working time is not easy to leak.<\/p><p>When the flat gasket and the contact surface are connected, the sealing should be better guaranteed, just like the good effect.<\/p><p>3, when the gasket receives pressure under the influence of temperature, the wrinkle resistance should be better, otherwise it will make the screw damaged, there will be hard gas leakage.<\/p><p>Do not get infected when using flat washers.<\/p><p>5, the use of flat washer can be very good disassembly this is the largest role of the choice of flat washer.<\/p><p>Remember to ensure normal use at relative temperature when using flat washer.<\/p><p>In order to better use the flat washer, when choosing the flat washer to try to choose the anti-rust anti-corrosion material dipping washer, so that not only save time and effort, and the role of the flat washer can play to very good.<\/p><p>When used with bolts and nuts, flat washer selection criteria:<\/p><p>When choosing gasket materials, attention should be paid to the electrochemical corrosion problem when different metals are contacted. The material of the flat washer is generally the same as that of the connecting piece, usually steel, alloy steel, stainless steel, aluminum alloy, etc. Copper and copper alloys can be used when electrical conductivity is required.<\/p><p>The inner diameter of the flat washer should be selected according to the larger value of the diameter of the thread or screw. The connected material is soft (such as composite material) or its outer diameter should be selected with the spring washer.<\/p><p>When W washer is placed under the bolt or screw head, flat washer with inner hole chamfer can be selected to avoid interference between the rounded corner of the head and the washer.<\/p><p>Steel gaskets should be used for important bolts with large diameters or in order to increase the extrusion resistance. Steel washers shall be used for tensile bolt or tensile shear composite bolt connection.<\/p><p>5, special gasket applied to special requirements, such as conductive copper gasket available; Available sealing gaskets with air tightness requirements.<\/p><p>The function of the flat washer:<\/p><p>Increase the contact area between screw and machine.<\/p><p>Eliminate the damage to the surface of the machine when the spring washeris unloading the screws. When used, it must be: spring washera flat washer, the flat washer is next to the machine surface, the spring washer is between the flat washer and the nut. The flat washer is to increase the force surface of the screw. In order to prevent screws from loosening, the spring washer plays a certain cushioning and protection role when it is stressed. Although flat washers can be sacrifice washers.<\/p><p>\u00a0<\/p><p>3, but more often it is used as a supplementary washer or flat pressure washer.<\/p><p>Advantages:<\/p><p>(1) By increasing the contact area, parts can be protected from damage;<\/p><p>\u2461 By increasing the contact area, reduce the pressure between the nut and the equipment, so as to play a protective role.<\/p><p>Disadvantages:<\/p><p>\u2460 Flat washer can not play the role of earthquake resistance;<\/p><p>(2) The flat washer has no anti-loose effect.<\/p><p>\u00a0<\/p><p>\u00a0<\/p><p><strong>Spring washer<\/strong><\/p><p>The function of the spring washer<\/p><p>1, the function of the spring washer is to tighten the nut, the spring washer to give the nut a elastic force, against the nut, so that it is not easy to fall off. The basic function of the spring is to give a force to the nut after it is tightened, increasing the friction between the nut and the bolt.<\/p><p>2, with the spring washer generally do not use flat washer,(in addition to to protect the fastener and the mounting surface of the surface to consider using flat washer and spring washer).<\/p><p>3, flat washer is generally used in connecting parts, one is soft texture, one is hard and brittle, its main function is to increase the contact area, disperse pressure, prevent the soft texture of the crush.<\/p><p>Advantages:<\/p><p>(1) The spring washer has good anti-loosening effect;<\/p><p>(2) Spring washer has better anti-seismic effect;<\/p><p>\u2462 Low manufacturing cost;<\/p><p>\u2463 It is convenient to install.<\/p><p>Disadvantages:<\/p><p>Spring washer is greatly affected by the material and process. If the material is not good, the heat treatment is not well grasped or the other process is not done, it is easy to crack, so we must choose a reliable manufacturer.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2e14fa14 e-flex e-con-boxed e-con e-parent\" data-id=\"2e14fa14\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-36b99a2e elementor-post-navigation-borders-yes elementor-widget elementor-widget-post-navigation\" data-id=\"36b99a2e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"post-navigation.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-post-navigation\" role=\"navigation\" aria-label=\"Post Navigation\">\n\t\t\t<div class=\"elementor-post-navigation__prev elementor-post-navigation__link\">\n\t\t\t\t<a href=\"https:\/\/www.myway-metal.com\/index.php\/2026\/08\/18\/common-challenges-faced-by-the-fastener-industry\/\" rel=\"prev\"><span class=\"post-navigation__arrow-wrapper post-navigation__arrow-prev\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-angle-left\" viewBox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M31.7 239l136-136c9.4-9.4 24.6-9.4 33.9 0l22.6 22.6c9.4 9.4 9.4 24.6 0 33.9L127.9 256l96.4 96.4c9.4 9.4 9.4 24.6 0 33.9L201.7 409c-9.4 9.4-24.6 9.4-33.9 0l-136-136c-9.5-9.4-9.5-24.6-.1-34z\"><\/path><\/svg><span class=\"elementor-screen-only\">Prev<\/span><\/span><span class=\"elementor-post-navigation__link__prev\"><span class=\"post-navigation__prev--label\">Previous<\/span><span class=\"post-navigation__prev--title\">Common Challenges Faced by the Fastener Industry<\/span><\/span><\/a>\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-post-navigation__separator-wrapper\">\n\t\t\t\t\t<div class=\"elementor-post-navigation__separator\"><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<div class=\"elementor-post-navigation__next elementor-post-navigation__link\">\n\t\t\t\t<a href=\"https:\/\/www.myway-metal.com\/index.php\/2026\/08\/18\/high-performance-fasteners-for-aerospace\/\" rel=\"next\"><span class=\"elementor-post-navigation__link__next\"><span class=\"post-navigation__next--label\">Next<\/span><span class=\"post-navigation__next--title\">High-Performance Fasteners for Aerospace<\/span><\/span><span class=\"post-navigation__arrow-wrapper post-navigation__arrow-next\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-angle-right\" viewBox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><span class=\"elementor-screen-only\">Next<\/span><\/span><\/a>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>The flat washer is used as a part to prevent the bolt and nut from locking. Flat washers are used where fasteners are used. How to choose a suitable flat washer? Flat washer is a kind of flat washer, which mainly makes the contact area of screws and some large equipment increase and tighten. When using flat washer, it is often suitable for nuts and nuts to cooperate with each other. When storing flat washer, it must be in the most effective sealing time, and has the necessary important characteristics:<\/p>\n<p>1, in the case of harsh environment, it should be said to seal the flat washer, when a certain temperature and pressure in the working time is not easy to leak.<\/p>\n<p>When the flat gasket and the contact surface are connected, the sealing should be better guaranteed, just like the good effect.<\/p>\n","protected":false},"author":1,"featured_media":6505,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-6503","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-washers"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The Difference Between Flat Washer And Spring Washer -<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The Difference Between Flat Washer And Spring Washer -\" \/>\n<meta property=\"og:description\" content=\"The flat washer is used as a part to prevent the bolt and nut from locking. Flat washers are used where fasteners are used. How to choose a suitable flat washer? Flat washer is a kind of flat washer, which mainly makes the contact area of screws and some large equipment increase and tighten. When using flat washer, it is often suitable for nuts and nuts to cooperate with each other. When storing flat washer, it must be in the most effective sealing time, and has the necessary important characteristics: 1, in the case of harsh environment, it should be said to seal the flat washer, when a certain temperature and pressure in the working time is not easy to leak. 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