{"id":669,"date":"2025-10-29T07:35:50","date_gmt":"2025-10-29T07:35:50","guid":{"rendered":"https:\/\/mj-anchor.com\/product\/flat-head-hex-socket-bolts\/"},"modified":"2025-10-31T09:39:55","modified_gmt":"2025-10-31T09:39:55","slug":"flat-head-hex-socket-bolts","status":"publish","type":"product","link":"https:\/\/mj-anchor.com\/es\/product\/flat-head-hex-socket-bolts\/","title":{"rendered":"Flat Head Hex Socket Bolts"},"content":{"rendered":"<h4><strong>Product Details<\/strong><\/h4>\n<p>These specialized screws are engineered for maximum durability, strength, and a clean aesthetic.<\/p>\n<ul>\n<li><strong>DIN 7991 Countersunk Head:<\/strong> The screw features a flat-topped, conical head (typically 90 degrees) designed to fit into a countersunk hole. This allows the head to sit completely flush with or below the surface of the workpiece, creating a smooth, professional finish that prevents interference with moving parts or other components.<\/li>\n<li><strong>Internal Hex Socket (Allen) Drive:<\/strong> The head is equipped with an internal hexagonal recess, allowing for high-torque installation with a standard hex key (Allen wrench). This secure drive system minimizes the risk of cam-out and protects the drive from external damage, maintaining the screw&#8217;s clean appearance.<\/li>\n<li><strong>High-Strength Carbon Steel:<\/strong> Manufactured from high-quality carbon steel, these bolts are available in various property classes to meet demanding strength requirements:\n<ul>\n<li><strong>Grade 8.8:<\/strong> High-tensile steel suitable for most industrial, automotive, and structural applications.<\/li>\n<li><strong>Grade 10.9 &amp; 12.9:<\/strong> Very high-strength steels for critical, high-stress assemblies requiring maximum clamping force and load-bearing capacity.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Advanced Dacromet Coating:<\/strong> The key feature of these bolts is the Dacromet coating. This is a non-electrolytic, water-based coating comprised of zinc and aluminum flakes in a chromate binder. Its benefits are significant:\n<ul>\n<li><strong>Superior Corrosion Resistance:<\/strong> Offers exceptional protection against rust, withstanding hundreds of hours of salt spray testing\u2014far exceeding standard zinc plating.<\/li>\n<li><strong>No Hydrogen Embrittlement:<\/strong> Because the coating is applied without electrolysis, there is no risk of hydrogen embrittlement, which is a critical concern for high-strength fasteners.<\/li>\n<li><strong>Heat and Chemical Resistance:<\/strong> Maintains its protective properties at elevated temperatures and is resistant to many industrial solvents and chemicals.<\/li>\n<li><strong>Thin, Uniform Layer:<\/strong> The coating provides excellent coverage without altering thread dimensions, ensuring a consistent fit.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4><strong>Product Parameters<\/strong><\/h4>\n<p>The technical specifications for our DIN 7991 Dacromet Coated Hex Socket Countersunk Head Cap Screws are detailed below.<\/p>\n<div class=\"MarkdownTable_tableContainer__2k5Kh\" tabindex=\"0\" role=\"region\">\n<table>\n<thead>\n<tr>\n<th>Parameter<\/th>\n<th>Specification<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Product Name<\/strong><\/td>\n<td>DIN 7991 Dacromet CSK Flat Head Hex Socket Bolt<\/td>\n<\/tr>\n<tr>\n<td><strong>Standard<\/strong><\/td>\n<td>DIN 7991<\/td>\n<\/tr>\n<tr>\n<td><strong>Material<\/strong><\/td>\n<td>High-Strength Carbon Steel<\/td>\n<\/tr>\n<tr>\n<td><strong>Property Class \/ Grade<\/strong><\/td>\n<td>8.8, 10.9, 12.9<\/td>\n<\/tr>\n<tr>\n<td><strong>Surface Treatment<\/strong><\/td>\n<td>Dacromet<\/td>\n<\/tr>\n<tr>\n<td><strong>Head Style<\/strong><\/td>\n<td>Countersunk (CSK) \/ Flat Head<\/td>\n<\/tr>\n<tr>\n<td><strong>Drive Style<\/strong><\/td>\n<td>Internal Hex Socket (Allen)<\/td>\n<\/tr>\n<tr>\n<td><strong>Diameter Range<\/strong><\/td>\n<td>M4 &#8211; M24<\/td>\n<\/tr>\n<tr>\n<td><strong>Brand Name<\/strong><\/td>\n<td>Duojia<\/td>\n<\/tr>\n<tr>\n<td><strong>Place of Origin<\/strong><\/td>\n<td>Hebei, China<\/td>\n<\/tr>\n<tr>\n<td><strong>Key Feature<\/strong><\/td>\n<td>Superior corrosion and heat resistance with a flush finish<\/td>\n<\/tr>\n<tr>\n<td><strong>Application<\/strong><\/td>\n<td>Automotive, Marine, Aerospace, Heavy Industry<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h4><strong>Product Features<\/strong><\/h4>\n<p>These high-performance screws are engineered to deliver uncompromising performance in the most challenging conditions:<\/p>\n<ul>\n<li><strong>Exceptional Corrosion Protection:<\/strong> The Dacromet coating provides a robust barrier against rust and environmental corrosion, making it ideal for outdoor, marine, and industrial use.<\/li>\n<li><strong>Perfect Flush-Mount Finish:<\/strong> The countersunk head design ensures a smooth, non-protruding surface, enhancing both safety and aesthetics.<\/li>\n<li><strong>High Tensile Strength:<\/strong> Made from high-grade carbon steel (8.8, 10.9, 12.9), these bolts provide the strength needed for critical, load-bearing joints.<\/li>\n<li><strong>Eliminates Hydrogen Embrittlement Risk:<\/strong> The non-electrolytic application process makes these screws a safe and reliable choice for high-strength fastening.<\/li>\n<li><strong>Secure High-Torque Installation:<\/strong> The internal hex drive allows for reliable and controlled tightening to achieve optimal clamping force.<\/li>\n<li><strong>Excellent Heat and Chemical Resistance:<\/strong> The coating performs reliably in high-temperature environments and is resistant to automotive fluids and industrial chemicals.<\/li>\n<\/ul>\n<h4><strong>Product Applications<\/strong><\/h4>\n<p>The unique combination of a flush-mount design and superior protective coating makes these screws indispensable for a wide range of demanding industries:<\/p>\n<ul>\n<li><strong>Automotive Industry:<\/strong> Ideal for fastening components in engine bays, brake systems, chassis, and underbody parts where resistance to heat, salt, and fluids is critical.<\/li>\n<li><strong>Marine Equipment:<\/strong> Used in boat and ship construction for securing hardware and fittings exposed to saltwater and harsh marine environments.<\/li>\n<li><strong>Aerospace and Defense:<\/strong> Suitable for assembling precision components where strength, reliability, and a flush profile are required.<\/li>\n<li><strong>Wind and Solar Energy:<\/strong> Used in the assembly of wind turbines and solar panel mountings that are constantly exposed to the elements.<\/li>\n<li><strong>Construction and Infrastructure:<\/strong> Perfect for architectural metalwork, bridges, and other structures requiring long-term durability and corrosion resistance.<\/li>\n<li><strong>Heavy Machinery:<\/strong> Provides a secure and lasting fastening solution for agricultural, mining, and manufacturing equipment.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Our DIN 7991 Dacromet Coated Hex Socket Countersunk Head Cap Screws represent the pinnacle of high-performance fastening for harsh environments. These screws combine the strength of high-tensile carbon steel with the advanced corrosion protection of a Dacromet coating, all while providing a perfectly flush finish. Designed to the DIN 7991 standard, their countersunk head allows them to sit level with the material surface, making them ideal for applications where a smooth, snag-free profile is essential. The Dacromet finish provides protection superior to conventional zinc plating, making these screws a reliable choice for automotive, marine, and industrial applications exposed to extreme weather, salt spray, and chemicals.<\/p>","protected":false},"featured_media":1318,"template":"","meta":[],"product_brand":[],"product_cat":[195],"product_tag":[102,132,145,146,179,201],"class_list":{"0":"post-669","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-hex-socket-bolt","7":"product_tag-stainless-steel-anchor-bolts","8":"product_tag-anchor-bolts-manufacturer","9":"product_tag-hex-head-bolt","10":"product_tag-hex-bolts-and-nuts","11":"product_tag-hex-flange-bolt","12":"product_tag-hex-bolt-socket","14":"first","15":"instock","16":"shipping-taxable","17":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/mj-anchor.com\/es\/wp-json\/wp\/v2\/product\/669","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mj-anchor.com\/es\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/mj-anchor.com\/es\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mj-anchor.com\/es\/wp-json\/wp\/v2\/media\/1318"}],"wp:attachment":[{"href":"https:\/\/mj-anchor.com\/es\/wp-json\/wp\/v2\/media?parent=669"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/mj-anchor.com\/es\/wp-json\/wp\/v2\/product_brand?post=669"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/mj-anchor.com\/es\/wp-json\/wp\/v2\/product_cat?post=669"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/mj-anchor.com\/es\/wp-json\/wp\/v2\/product_tag?post=669"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}