{"id":5469,"date":"2026-05-12T14:43:41","date_gmt":"2026-05-12T06:43:41","guid":{"rendered":"https:\/\/xzfastener.com\/?post_type=product&p=5469"},"modified":"2026-05-12T14:43:42","modified_gmt":"2026-05-12T06:43:42","slug":"304-stainless-steel-hollow-hex-head-bolts-metric-vented-hex-bolts-m3-m4-m5-m6-m8-m10-m12-with-center-hole","status":"publish","type":"product","link":"https:\/\/xzfastener.com\/vi\/products\/304-stainless-steel-hollow-hex-head-bolts-metric-vented-hex-bolts-m3-m4-m5-m6-m8-m10-m12-with-center-hole\/","title":{"rendered":"304 Stainless Steel Hollow Hex Head Bolts, Metric Vented Hex Bolts M3 M4 M5 M6 M8 M10 M12 with Center Hole"},"content":{"rendered":"

Product Description<\/h1>\n

304 Stainless Steel Hollow Hex Head Bolts<\/h2>\n

Our 304 Stainless Steel Hollow Hex Head Bolts<\/strong> are specially designed fasteners with a central hole through the bolt body. Compared with standard solid hex bolts, these hollow bolts provide additional functionality for applications that require ventilation, drainage, cable routing, weight reduction, or special assembly requirements.<\/p>\n

Made from high-quality 304 stainless steel<\/strong>, these bolts offer good corrosion resistance, clean appearance, and reliable durability. The external hex head allows easy installation with standard spanners, wrenches, or socket tools.<\/p>\n

These hollow hex bolts are available in common metric sizes from M3 to M12<\/strong>, making them suitable for machinery, equipment assembly, custom fastening projects, industrial maintenance, and special-purpose applications.<\/p>\n

\n

Key Features<\/h2>\n
    \n
  • Hollow center hole design<\/strong> for ventilation, drainage, cable passage, or special assembly use.<\/li>\n
  • 304 stainless steel material<\/strong> with good corrosion resistance and long service life.<\/li>\n
  • External hex head<\/strong> for easy tightening and removal.<\/li>\n
  • Metric thread sizes<\/strong> available from M3 to M12.<\/li>\n
  • Clean stainless steel finish<\/strong> suitable for visible assembly areas.<\/li>\n
  • Durable and reusable<\/strong> for maintenance and replacement work.<\/li>\n
  • Suitable for custom applications<\/strong> where standard solid bolts cannot meet the design requirement.<\/li>\n<\/ul>\n
    \n

    Product Specifications<\/h2>\n
    \n
    \n\n\n\n\n\n\n\n\n\n\n\n\n\n
    Item<\/th>\nDescription<\/th>\n<\/tr>\n<\/thead>\n
    Product Name<\/td>\nHollow Hex Head Bolt<\/td>\n<\/tr>\n
    Material<\/td>\nStainless Steel 304<\/td>\n<\/tr>\n
    Head Type<\/td>\nHex Head<\/td>\n<\/tr>\n
    Thread Type<\/td>\nMetric Thread<\/td>\n<\/tr>\n
    Structure<\/td>\nHollow Center Hole<\/td>\n<\/tr>\n
    Available Sizes<\/td>\nM3, M4, M5, M6, M8, M10, M12<\/td>\n<\/tr>\n
    Surface Finish<\/td>\nPlain Stainless Steel<\/td>\n<\/tr>\n
    Unit<\/td>\nmm<\/td>\n<\/tr>\n
    Application<\/td>\nMachinery, equipment, custom assembly, ventilation, drainage, special fastening<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
    \n

    Size Chart<\/h2>\n
    \n
    \n\n\n\n\n\n\n\n\n\n\n\n
    Size<\/th>\nPitch<\/th>\nHead Thickness<\/th>\nHead Width<\/th>\nHole Diameter<\/th>\n<\/tr>\n<\/thead>\n
    M3<\/td>\n0.5<\/td>\n1.9\u20132.2<\/td>\n5.25\u20135.5<\/td>\n0.8\u20131.2<\/td>\n<\/tr>\n
    M4<\/td>\n0.7<\/td>\n2.8\u20133.0<\/td>\n6.65\u20137<\/td>\n1.5\u20131.8<\/td>\n<\/tr>\n
    M5<\/td>\n0.8<\/td>\n3.26\u20133.74<\/td>\n7.65\u20138<\/td>\n1.8<\/td>\n<\/tr>\n
    M6<\/td>\n1.0<\/td>\n3.76\u20134.24<\/td>\n9.65\u201310<\/td>\n2.0<\/td>\n<\/tr>\n
    M8<\/td>\n1.25<\/td>\n5.06\u20135.54<\/td>\n12.57\u201313<\/td>\n2\u20132.5<\/td>\n<\/tr>\n
    M10<\/td>\n1.5<\/td>\n6.11\u20136.69<\/td>\n16.57\u201317<\/td>\n3.0<\/td>\n<\/tr>\n
    M12<\/td>\n1.75<\/td>\n7.21\u20137.79<\/td>\n18.48\u201319<\/td>\n3.0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
    \n

    What Are Hollow Hex Bolts?<\/h2>\n

    Hollow hex bolts<\/strong> are hex head bolts with a hole through the center of the bolt body. This design allows air, gas, liquid, wire, or other small components to pass through the bolt, depending on the application.<\/p>\n

    They are commonly used when the bolt must provide fastening while also allowing functional passage through the center.<\/p>\n

    \n

    Common Applications<\/h2>\n
    \n
    \n\n\n\n\n\n\n\n\n\n\n\n
    Application Area<\/th>\nUse<\/th>\n<\/tr>\n<\/thead>\n
    Machinery Assembly<\/td>\nSpecial fastening and positioning<\/td>\n<\/tr>\n
    Equipment Maintenance<\/td>\nReplacement for customized hollow bolts<\/td>\n<\/tr>\n
    Ventilation Systems<\/td>\nAllows air or gas passage<\/td>\n<\/tr>\n
    Drainage Applications<\/td>\nAllows liquid discharge in certain assemblies<\/td>\n<\/tr>\n
    Electrical Assembly<\/td>\nCable or wire routing in special designs<\/td>\n<\/tr>\n
    Industrial Equipment<\/td>\nCustom fastening in production equipment<\/td>\n<\/tr>\n
    DIY & Custom Projects<\/td>\nSpecial structure connection and modification<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
    \n

    304 Stainless Steel Advantages<\/h2>\n

    304 stainless steel is one of the most widely used stainless steel materials. It offers a good balance of corrosion resistance, strength, and cost performance.<\/p>\n

    \n
    \n\n\n\n\n\n\n
    Material<\/th>\nFeature<\/th>\nRecommended Use<\/th>\n<\/tr>\n<\/thead>\n
    304 Stainless Steel<\/td>\nGood corrosion resistance and clean appearance<\/td>\nIndoor, outdoor, machinery, general industrial use<\/td>\n<\/tr>\n
    316 Stainless Steel<\/td>\nHigher corrosion resistance<\/td>\nMarine, coastal, chemical, high-humidity environments<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

    For most standard machinery and general-purpose applications, 304 stainless steel hollow hex bolts<\/strong> are a practical and reliable choice.<\/p>\n

    \n

    Product Advantages<\/h2>\n

    These 304 Stainless Steel Hollow Hex Head Bolts<\/strong> combine fastening strength with functional hollow-hole design. The hex head provides stable torque transmission during installation, while the stainless steel body helps resist rust and corrosion.<\/p>\n

    They are suitable for customers who need special fasteners for machinery, equipment repair, custom production, or non-standard assembly solutions.<\/p>\n

    \n

    Installation Notes<\/h2>\n

    Please confirm the following details before ordering:<\/p>\n

    \n
    \n\n\n\n\n\n\n\n\n\n\n
    Required Information<\/th>\nExample<\/th>\n<\/tr>\n<\/thead>\n
    Size<\/td>\nM3, M4, M5, M6, M8, M10, M12<\/td>\n<\/tr>\n
    Thread Pitch<\/td>\nStandard metric pitch or customized pitch<\/td>\n<\/tr>\n
    Length<\/td>\nAccording to your project requirement<\/td>\n<\/tr>\n
    Hole Diameter<\/td>\nPlease confirm if special hole size is required<\/td>\n<\/tr>\n
    Material<\/td>\n304 stainless steel or other material<\/td>\n<\/tr>\n
    Quantity<\/td>\nSmall quantity or bulk order<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

    The hollow design is not the same as a standard solid bolt. Please make sure the hole diameter and bolt length match your application.<\/p>\n

    \n

    FAQ<\/h2>\n

    Q1: What is a hollow hex bolt?<\/h3>\n

    A hollow hex bolt is a hex head bolt with a hole through the center. It can be used for fastening while allowing ventilation, drainage, cable routing, or special assembly functions.<\/p>\n

    Q2: What material are these bolts made from?<\/h3>\n

    These bolts are made from 304 stainless steel<\/strong>, which provides good corrosion resistance and durability.<\/p>\n

    Q3: What sizes are available?<\/h3>\n

    Available sizes include M3, M4, M5, M6, M8, M10, and M12<\/strong>.<\/p>\n

    Q4: Are these bolts metric or imperial?<\/h3>\n

    These are metric hollow hex bolts<\/strong>.<\/p>\n

    Q5: Can the hole diameter be customized?<\/h3>\n

    Yes. The hole diameter can be customized according to your drawing, sample, or project requirement.<\/p>\n

    Q6: Can these bolts be used outdoors?<\/h3>\n

    Yes. 304 stainless steel is suitable for many indoor and outdoor environments. For marine or highly corrosive environments, 316 stainless steel may be recommended.<\/p>\n

    Q7: Are these bolts fully threaded?<\/h3>\n

    They can be supplied as fully threaded or partially threaded depending on the size, length, and customer requirements.<\/p>\n

    Q8: What tools are used for installation?<\/h3>\n

    They can be installed with a standard wrench, spanner, or socket tool matching the hex head size.<\/p>\n

    Q9: Can you produce according to samples or drawings?<\/h3>\n

    Yes. Custom production is available based on samples, drawings, or detailed specifications.<\/p>\n

    \n

    Short Product Summary<\/h2>\n

    304 Stainless Steel Hollow Hex Head Bolts<\/strong> are metric hex fasteners with a central hole design. Available in sizes M3 to M12<\/strong>, these bolts are suitable for machinery, equipment assembly, ventilation, drainage, cable routing, repair, and custom industrial applications. Made from durable 304 stainless steel, they provide good corrosion resistance, clean appearance, and reliable fastening performance.<\/p>","protected":false},"excerpt":{"rendered":"

    Product Description 304 Stainless Steel Hollow Hex Head Bolts Our 304 Stainless Steel Hollow Hex Head Bolts are specially designed fasteners with a central hole through the bolt body. Compared with standard solid hex bolts, these hollow bolts provide additional functionality for applications that require ventilation, drainage, cable routing, weight reduction, or special assembly requirements. […]<\/p>\n","protected":false},"featured_media":5470,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"fastener-coating":[95,37,94],"fastener-material":[43],"fastener-type":[53,474],"product_brand":[],"product_cat":[22,28],"product_tag":[],"class_list":{"0":"post-5469","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"fastener-coating-natural-finish","7":"fastener-coating-original-material","8":"fastener-coating-original-material-natural-finish","9":"fastener-material-stainless-steel","10":"fastener-type-bolts","11":"fastener-type-hex-head-bolt","12":"product_cat-standard-fasteners","13":"product_cat-custom-non-standard-fasteners","15":"first","16":"instock","17":"shipping-taxable","18":"product-type-simple"},"acf":[],"_links":{"self":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/product\/5469","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/comments?post=5469"}],"version-history":[{"count":1,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/product\/5469\/revisions"}],"predecessor-version":[{"id":5471,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/product\/5469\/revisions\/5471"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/media\/5470"}],"wp:attachment":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/media?parent=5469"}],"wp:term":[{"taxonomy":"fastener-coating","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/fastener-coating?post=5469"},{"taxonomy":"fastener-material","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/fastener-material?post=5469"},{"taxonomy":"fastener-type","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/fastener-type?post=5469"},{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/product_brand?post=5469"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/product_cat?post=5469"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/product_tag?post=5469"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}