{"id":5724,"date":"2026-05-22T22:22:08","date_gmt":"2026-05-22T14:22:08","guid":{"rendered":"https:\/\/xzfastener.com\/?post_type=product&p=5724"},"modified":"2026-06-02T15:08:00","modified_gmt":"2026-06-02T07:08:00","slug":"bs-4395-high-strength-hex-structural-bolt-black-oxide-carbon-steel-m3-thread-fastener","status":"publish","type":"product","link":"https:\/\/xzfastener.com\/es_mx\/products\/bs-4395-high-strength-hex-structural-bolt-black-oxide-carbon-steel-m3-thread-fastener\/","title":{"rendered":"BS 4395 Perno estructural hexagonal de alta resistencia \u00f3xido negro acero al carbono M3 Sujetador de rosca"},"content":{"rendered":"

Descripci\u00f3n del producto<\/h2>\n

el BS 4395 High Strength Hex Structural Bolt with Black Oxide Finish<\/strong> is a durable fastening solution designed for machinery assembly, steel structure connections, industrial equipment, automotive components, and general engineering applications. Manufactured from high strength carbon steel<\/strong>, this bolt offers reliable mechanical strength, stable fastening performance, and strong resistance to loosening under demanding working conditions.<\/p>\n

This bolt features a hexagonal head<\/strong>, a smooth shank section, and a precision-machined metric thread. The hex head allows easy tightening with standard spanners, sockets, or power tools. The partially threaded design helps provide better shear resistance and improved structural connection performance compared with fully threaded bolts in certain applications.<\/p>\n

el Black Oxide Finish<\/strong> gives the bolt a dark black appearance and provides mild corrosion resistance when combined with protective oil. It is commonly used for high strength bolts, machinery fasteners, industrial hardware, and applications where a black surface finish is preferred.<\/p>\n

\n

Caracter\u00edsticas clave<\/h2>\n
    \n
  • BS 4395 style high strength hex structural bolt<\/li>\n
  • Made from high strength carbon steel<\/li>\n
  • Black Oxide Finish for a dark industrial appearance<\/li>\n
  • Hex head design for easy installation<\/li>\n
  • Partial thread design for strong structural fastening<\/li>\n
  • Suitable for machinery, steel structure, equipment, and automotive use<\/li>\n
  • OEM and ODM customization available<\/li>\n
  • Available in different sizes, lengths, grades, and packaging options<\/li>\n<\/ul>\n
    \n

    Especificaciones del producto<\/h2>\n
    \n
    \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    Art\u00edculo<\/th>\nEspecificaci\u00f3n<\/th>\n<\/tr>\n<\/thead>\n
    Nombre del producto<\/td>\nHigh Strength Hex Structural Bolt<\/td>\n<\/tr>\n
    Est\u00e1ndar<\/td>\nBS 4395<\/td>\n<\/tr>\n
    Tama\u00f1o del hilo<\/td>\nM3 \/ Customized Sizes Available<\/td>\n<\/tr>\n
    Materiales<\/td>\nacero al carbono<\/td>\n<\/tr>\n
    Tratamiento superficial<\/td>\nBlack Oxide Finish<\/td>\n<\/tr>\n
    Tipo de cabeza<\/td>\ncabeza hexagonal<\/td>\n<\/tr>\n
    Tipo de hilo<\/td>\nRosca m\u00e9trica<\/td>\n<\/tr>\n
    Dise\u00f1o de hilo<\/td>\nPartial Thread \/ Full Thread Optional<\/td>\n<\/tr>\n
    clase de resistencia<\/td>\nHigh Strength Grade Available<\/td>\n<\/tr>\n
    Color<\/td>\nnegro<\/td>\n<\/tr>\n
    Solicitud<\/td>\nSteel Structure, Machinery, Construction, Equipment Assembly<\/td>\n<\/tr>\n
    Servicio personalizado<\/td>\nOEM \/ ODM Supported<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
    \n

    Surface Treatment: Black Oxide Finish<\/h2>\n

    el Black Oxide Finish<\/strong> is a common surface treatment for carbon steel and alloy steel fasteners. It creates a black surface layer on the bolt, improving appearance and providing basic anti-rust protection when used with oil or other protective coatings.<\/p>\n

    \n
    \n\n\n\n\n\n\n\n\n\n
    Acabado superficial<\/th>\nApariencia<\/th>\nResistencia a la corrosi\u00f3n<\/th>\nUso com\u00fan<\/th>\n<\/tr>\n<\/thead>\n
    Black Oxide Finish<\/td>\nBlack \/ Dark Black<\/td>\nBasic, usually with oil protection<\/td>\nHigh strength bolts, machinery fasteners<\/td>\n<\/tr>\n
    Fosfato negro<\/td>\nMatte Black \/ Dark Gray<\/td>\nBetter than plain black oxide in some cases<\/td>\nAutomotive and industrial bolts<\/td>\n<\/tr>\n
    zincado<\/td>\nPlata \/ Zinc Blanco<\/td>\nGeneral rust protection<\/td>\nStandard hardware fasteners<\/td>\n<\/tr>\n
    galvanizado en caliente<\/td>\nGray \/ Rough Silver<\/td>\nStrong outdoor corrosion resistance<\/td>\nEstructuras de acero al aire libre<\/td>\n<\/tr>\n
    Plain Finish<\/td>\nNatural Steel Color<\/td>\nBajo<\/td>\nTemporary or internal applications<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
    \n

    Ventajas del producto<\/h2>\n
    \n
    \n\n\n\n\n\n\n\n\n\n\n
    ventaja<\/th>\nDescripci\u00f3n<\/th>\n<\/tr>\n<\/thead>\n
    High Strength Material<\/td>\nCarbon steel provides reliable mechanical strength for heavy-duty fastening.<\/td>\n<\/tr>\n
    Black Surface Appearance<\/td>\nBlack oxide finish gives the bolt a clean, dark, industrial look.<\/td>\n<\/tr>\n
    F\u00e1cil instalaci\u00f3n<\/td>\nHex head design allows quick tightening with standard tools.<\/td>\n<\/tr>\n
    Strong Structural Connection<\/td>\nPartial thread design helps improve shear resistance in suitable applications.<\/td>\n<\/tr>\n
    Customizable Production<\/td>\nSize, length, thread, grade, finish, and packaging can be customized.<\/td>\n<\/tr>\n
    Cost-Effective Fastener<\/td>\nCarbon steel construction offers a good balance between strength and price.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
    \n

    Aplicaciones comunes<\/h2>\n

    el BS 4395 High Strength Hex Structural Bolt with Black Oxide Finish<\/strong> is widely used in industrial and mechanical fastening systems.<\/p>\n

    \n
    \n\n\n\n\n\n\n\n\n\n\n
    Industria<\/th>\nAplicaci\u00f3n t\u00edpica<\/th>\n<\/tr>\n<\/thead>\n
    Estructura de acero<\/td>\nSteel frame assembly, beam connection, bracket fixing<\/td>\n<\/tr>\n
    Maquinaria<\/td>\nMachine body assembly, equipment installation, mechanical connection<\/td>\n<\/tr>\n
    Construcci\u00f3n<\/td>\nSupport frames, metal plates, structural components<\/td>\n<\/tr>\n
    Automotriz<\/td>\nChassis parts, brackets, engine-related components<\/td>\n<\/tr>\n
    Equipos industriales<\/td>\nProduction equipment, machine base, support systems<\/td>\n<\/tr>\n
    General Engineering<\/td>\nRepair, maintenance, custom metal fabrication<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
    \n

    Material and Custom Options<\/h2>\n
    \n
    \n\n\n\n\n\n\n\n\n\n\n\n
    Custom Item<\/th>\nOpciones disponibles<\/th>\n<\/tr>\n<\/thead>\n
    Materiales<\/td>\nCarbon Steel, Alloy Steel, Stainless Steel<\/td>\n<\/tr>\n
    Tama\u00f1o<\/td>\nM3, M4, M5, M6, M8, M10, M12, M16, M20, Custom<\/td>\n<\/tr>\n
    Longitud<\/td>\nAccording to customer drawing or sample<\/td>\n<\/tr>\n
    Tipo de hilo<\/td>\nCoarse Thread, Fine Thread, Full Thread, Partial Thread<\/td>\n<\/tr>\n
    Acabado superficial<\/td>\nBlack Oxide, Black Phosphate, Zinc Plated, HDG, Plain<\/td>\n<\/tr>\n
    clase de resistencia<\/td>\n8.8, 10.9, 12.9, Customized Grade<\/td>\n<\/tr>\n
    Embalaje<\/td>\nBulk Carton, Small Box, Plastic Bag, Pallet, Customized Packing<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
    \n

    Why Choose Black Oxide Hex Structural Bolts?<\/h2>\n

    Black oxide hex bolts are commonly selected when customers need a dark surface finish<\/strong>, good dimensional accuracy, and reliable fastening performance. Compared with thick coatings such as hot dip galvanizing, black oxide creates a thinner surface layer, which helps maintain better thread accuracy.<\/p>\n

    For high strength bolts, black oxide is often used together with protective oil to reduce surface oxidation during storage and transportation. It is suitable for indoor machinery, equipment assembly, automotive parts, and general industrial applications.<\/p>\n

    \n

    Control de calidad<\/h2>\n
    \n
    \n\n\n\n\n\n\n\n\n\n\n
    Art\u00edculo de inspecci\u00f3n<\/th>\nProp\u00f3sito<\/th>\n<\/tr>\n<\/thead>\n
    Dimension Inspection<\/td>\nCheck head size, shank diameter, length, and thread length<\/td>\n<\/tr>\n
    Thread Gauge Test<\/td>\nEnsure thread accuracy and nut compatibility<\/td>\n<\/tr>\n
    Prueba de dureza<\/td>\nVerify mechanical strength and material performance<\/td>\n<\/tr>\n
    Prueba de tracci\u00f3n<\/td>\nConfirm load-bearing capacity<\/td>\n<\/tr>\n
    Surface Inspection<\/td>\nCheck black oxide appearance and finish quality<\/td>\n<\/tr>\n
    Packaging Inspection<\/td>\nEnsure safe packing for storage and shipping<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
    \n

    Preguntas frecuentes<\/h2>\n

    1. What is a Black Oxide Finish?<\/h3>\n

    Black oxide is a chemical surface treatment that forms a black layer on carbon steel or alloy steel fasteners. It improves appearance and provides basic corrosion resistance, especially when combined with protective oil.<\/p>\n

    2. Is Black Oxide better than zinc plating?<\/h3>\n

    Black oxide provides a dark appearance and better dimensional accuracy because the coating layer is very thin. Zinc plating usually offers better corrosion resistance, while black oxide is more commonly used for high strength and machinery fasteners.<\/p>\n

    3. Can black oxide bolts be used outdoors?<\/h3>\n

    Black oxide bolts are mainly recommended for indoor or low-corrosion environments. For outdoor, humid, or marine environments, hot dip galvanized, zinc plated, or stainless steel bolts are usually better choices.<\/p>\n

    4. What material is this bolt made from?<\/h3>\n

    This bolt is made from high strength carbon steel<\/strong>. Alloy steel and stainless steel versions can also be supplied according to customer requirements.<\/p>\n

    5. Is this bolt fully threaded or partially threaded?<\/h3>\n

    The product shown is a partially threaded hex bolt<\/strong>. Full thread versions can also be customized if required.<\/p>\n

    6. Can you supply matching nuts and washers?<\/h3>\n

    Yes. We can supply matching hex nuts, heavy hex nuts, flat washers, spring washers, and complete bolt-nut-washer assemblies.<\/p>\n

    7. Can the size be customized?<\/h3>\n

    Yes. We can customize size, length, thread pitch, material, strength grade, surface treatment, and packaging according to drawings, samples, or customer specifications.<\/p>\n

    8. What information is needed for a quotation?<\/h3>\n

    Please provide the bolt size, length, thread type, material, grade, surface finish, quantity, packaging requirement, and destination port or delivery address.<\/p>\n

    \n

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    BS 4395 high strength hex structural bolt made from black oxide carbon steel with M3 metric thread. Durable industrial fastener for machinery, steel structures, construction, automotive parts, and equipment assembly.<\/strong><\/p>","protected":false},"featured_media":5725,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"fastener-coating":[142,34,150],"fastener-material":[42],"fastener-type":[53,474],"product_brand":[],"product_cat":[22,29],"product_tag":[],"class_list":{"0":"post-5724","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"fastener-coating-black-oxide","7":"fastener-coating-blackening","8":"fastener-coating-custom-color-coating","9":"fastener-material-carbon-steel","10":"fastener-type-bolts","11":"fastener-type-hex-head-bolt","12":"product_cat-standard-fasteners","13":"product_cat-various-coated-fasteners","15":"first","16":"instock","17":"shipping-taxable","18":"product-type-simple"},"acf":[],"_links":{"self":[{"href":"https:\/\/xzfastener.com\/es_mx\/wp-json\/wp\/v2\/product\/5724","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xzfastener.com\/es_mx\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/xzfastener.com\/es_mx\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/xzfastener.com\/es_mx\/wp-json\/wp\/v2\/comments?post=5724"}],"version-history":[{"count":1,"href":"https:\/\/xzfastener.com\/es_mx\/wp-json\/wp\/v2\/product\/5724\/revisions"}],"predecessor-version":[{"id":5726,"href":"https:\/\/xzfastener.com\/es_mx\/wp-json\/wp\/v2\/product\/5724\/revisions\/5726"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/xzfastener.com\/es_mx\/wp-json\/wp\/v2\/media\/5725"}],"wp:attachment":[{"href":"https:\/\/xzfastener.com\/es_mx\/wp-json\/wp\/v2\/media?parent=5724"}],"wp:term":[{"taxonomy":"fastener-coating","embeddable":true,"href":"https:\/\/xzfastener.com\/es_mx\/wp-json\/wp\/v2\/fastener-coating?post=5724"},{"taxonomy":"fastener-material","embeddable":true,"href":"https:\/\/xzfastener.com\/es_mx\/wp-json\/wp\/v2\/fastener-material?post=5724"},{"taxonomy":"fastener-type","embeddable":true,"href":"https:\/\/xzfastener.com\/es_mx\/wp-json\/wp\/v2\/fastener-type?post=5724"},{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/xzfastener.com\/es_mx\/wp-json\/wp\/v2\/product_brand?post=5724"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/xzfastener.com\/es_mx\/wp-json\/wp\/v2\/product_cat?post=5724"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/xzfastener.com\/es_mx\/wp-json\/wp\/v2\/product_tag?post=5724"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}