{"id":5717,"date":"2026-05-22T22:22:37","date_gmt":"2026-05-22T14:22:37","guid":{"rendered":"https:\/\/xzfastener.com\/?post_type=product&p=5717"},"modified":"2026-06-02T15:08:12","modified_gmt":"2026-06-02T07:08:12","slug":"round-head-nip-bolts-m3-m4-high-strength-stainless-steel-alloy-steel-black-finish-fasteners","status":"publish","type":"product","link":"https:\/\/xzfastener.com\/vi\/products\/round-head-nip-bolts-m3-m4-high-strength-stainless-steel-alloy-steel-black-finish-fasteners\/","title":{"rendered":"Round Head Nip Bolts M3 M4 High Strength Stainless Steel & Alloy Steel Black Finish Fasteners"},"content":{"rendered":"

Product Description<\/h2>\n

Round Head Nip Bolts are high-strength fastening components designed for secure assembly in machinery, equipment, metal structures, automotive parts, and customized industrial applications. With a rounded head design and a threaded shank, these bolts provide reliable clamping force while offering a neat and compact appearance after installation.<\/p>\n

This product is available in M3, M4, and customized sizes<\/strong>, with material options including stainless steel, alloy steel, and carbon steel<\/strong>. The black surface finish provides a professional appearance and can offer improved surface protection depending on the selected treatment, such as black oxide, black zinc, or black phosphating<\/strong>.<\/p>\n

These bolts are suitable for OEM and ODM production and can be customized according to drawings, samples, or specific project requirements.<\/p>\n

\n

Key Features<\/h2>\n
\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Feature<\/th>\nDescription<\/th>\n<\/tr>\n<\/thead>\n
Product Name<\/td>\nRound Head Nip Bolt<\/td>\n<\/tr>\n
Size Range<\/td>\nM3, M4, or customized<\/td>\n<\/tr>\n
Material Options<\/td>\nStainless Steel, Alloy Steel, Carbon Steel<\/td>\n<\/tr>\n
Head Type<\/td>\nRound Head<\/td>\n<\/tr>\n
Thread Type<\/td>\nMetric Thread<\/td>\n<\/tr>\n
Surface Finish<\/td>\nBlack Finish \/ Black Oxide \/ Black Zinc \/ Black Phosphate<\/td>\n<\/tr>\n
Strength<\/td>\nStandard or High Strength Available<\/td>\n<\/tr>\n
Application<\/td>\nMachinery, equipment, automotive, metal assembly, custom fastening<\/td>\n<\/tr>\n
Customization<\/td>\nSize, material, grade, finish, thread length, packaging<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
\n

Product Advantages<\/h2>\n

1. Round Head Design<\/h3>\n

The round head provides a smooth and finished appearance after installation. It is suitable for applications where the bolt head may remain visible and where a clean assembly look is required.<\/p>\n

2. High Strength Performance<\/h3>\n

Available in alloy steel or high-strength carbon steel, these bolts can provide excellent mechanical performance for demanding fastening applications.<\/p>\n

3. Multiple Material Options<\/h3>\n

Different materials can be selected according to the working environment:<\/p>\n

\n
\n\n\n\n\n\n\n\n
Material<\/th>\nMain Advantage<\/th>\n<\/tr>\n<\/thead>\n
Stainless Steel<\/td>\nBetter corrosion resistance<\/td>\n<\/tr>\n
Alloy Steel<\/td>\nHigher strength and durability<\/td>\n<\/tr>\n
Carbon Steel<\/td>\nCost-effective for general use<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

4. Black Surface Finish<\/h3>\n

The black surface finish gives the bolt a professional industrial appearance. Depending on customer requirements, the finish can be made as black oxide, black zinc plating, or black phosphating.<\/p>\n

\n
\n\n\n\n\n\n\n\n\n
Surface Treatment<\/th>\nAppearance<\/th>\nTypical Use<\/th>\n<\/tr>\n<\/thead>\n
Black Oxide<\/td>\nDark black, thin coating<\/td>\nMachinery, tools, indoor use<\/td>\n<\/tr>\n
Black Zinc Plated<\/td>\nBlack glossy coating<\/td>\nBetter corrosion resistance than black oxide<\/td>\n<\/tr>\n
Black Phosphate<\/td>\nMatte black \/ dark gray<\/td>\nAutomotive, machinery, anti-rust oil treatment<\/td>\n<\/tr>\n
Plain Black<\/td>\nNatural dark surface<\/td>\nGeneral industrial use<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
\n

Technical Specifications<\/h2>\n
\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Item<\/th>\nSpecification<\/th>\n<\/tr>\n<\/thead>\n
Product Type<\/td>\nRound Head Nip Bolt<\/td>\n<\/tr>\n
Available Sizes<\/td>\nM3, M4, customized sizes<\/td>\n<\/tr>\n
Material<\/td>\nStainless Steel \/ Alloy Steel \/ Carbon Steel<\/td>\n<\/tr>\n
Grade<\/td>\nStandard grade or high strength grade<\/td>\n<\/tr>\n
Head Style<\/td>\nRound Head<\/td>\n<\/tr>\n
Thread<\/td>\nMetric Thread<\/td>\n<\/tr>\n
Finish<\/td>\nBlack Finish \/ Customized Finish<\/td>\n<\/tr>\n
Production Standard<\/td>\nStandard or customized according to drawing<\/td>\n<\/tr>\n
Packing<\/td>\nBulk bag, carton, small box, pallet, or custom packaging<\/td>\n<\/tr>\n
Service<\/td>\nOEM \/ ODM Available<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
\n

Common Applications<\/h2>\n

Round head nip bolts are widely used in industrial and commercial assembly.<\/p>\n

\n
\n\n\n\n\n\n\n\n\n\n\n
Application Area<\/th>\nUsage<\/th>\n<\/tr>\n<\/thead>\n
Machinery Assembly<\/td>\nEquipment fastening and mechanical connection<\/td>\n<\/tr>\n
Automotive Parts<\/td>\nVehicle components and accessory assembly<\/td>\n<\/tr>\n
Metal Fabrication<\/td>\nMetal frame, bracket, and structural fixing<\/td>\n<\/tr>\n
Electrical Equipment<\/td>\nCabinet, panel, and device assembly<\/td>\n<\/tr>\n
Furniture & Hardware<\/td>\nCustomized hardware connection<\/td>\n<\/tr>\n
OEM Projects<\/td>\nCustomized fastener production according to drawings<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
\n

Customization Options<\/h2>\n

We can support different customized requirements for importers, wholesalers, distributors, and project buyers.<\/p>\n

\n
\n\n\n\n\n\n\n\n\n\n\n\n
Custom Item<\/th>\nAvailable Options<\/th>\n<\/tr>\n<\/thead>\n
Diameter<\/td>\nM3, M4, M5, M6, or custom<\/td>\n<\/tr>\n
Length<\/td>\nStandard or customized length<\/td>\n<\/tr>\n
Material<\/td>\nStainless steel, alloy steel, carbon steel<\/td>\n<\/tr>\n
Surface Finish<\/td>\nBlack oxide, zinc plated, nickel plated, hot dip galvanized, plain<\/td>\n<\/tr>\n
Head Type<\/td>\nRound head or customized head shape<\/td>\n<\/tr>\n
Thread<\/td>\nFull thread, partial thread, special thread<\/td>\n<\/tr>\n
Packing<\/td>\nNeutral packing, customer logo packing, carton, pallet<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
\n

Why Choose Our Round Head Nip Bolts?<\/h2>\n

We supply high-quality fastening products for global B2B customers, including distributors, hardware wholesalers, machinery factories, construction suppliers, and OEM manufacturers.<\/p>\n

Our advantages include:<\/p>\n

\n
\n\n\n\n\n\n\n\n\n\n\n
Advantage<\/th>\nDetails<\/th>\n<\/tr>\n<\/thead>\n
OEM\/ODM Support<\/td>\nProduction according to drawings or samples<\/td>\n<\/tr>\n
Multiple Materials<\/td>\nStainless steel, alloy steel, carbon steel available<\/td>\n<\/tr>\n
Flexible Surface Treatment<\/td>\nBlack finish, zinc plated, hot dip galvanized, and more<\/td>\n<\/tr>\n
Stable Quality<\/td>\nStrict inspection for size, thread, and appearance<\/td>\n<\/tr>\n
Export Packaging<\/td>\nSuitable for long-distance international shipping<\/td>\n<\/tr>\n
Fast Communication<\/td>\nProfessional foreign trade service support<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
\n

FAQ<\/h2>\n

Q1: What is a round head nip bolt?<\/h3>\n

A round head nip bolt is a fastening component with a rounded head and threaded shank. It is commonly used for machinery, equipment, metal parts, and customized assembly applications.<\/p>\n

Q2: What sizes are available?<\/h3>\n

Common sizes include M3 and M4<\/strong>, and we can also produce other sizes according to customer requirements.<\/p>\n

Q3: What materials can you supply?<\/h3>\n

We can supply stainless steel, alloy steel, and carbon steel<\/strong> according to the required strength and working environment.<\/p>\n

Q4: Is this product high strength?<\/h3>\n

Yes. High-strength grades can be supplied, especially when using alloy steel or high-strength carbon steel.<\/p>\n

Q5: What is the black surface treatment?<\/h3>\n

The black finish can be customized as black oxide, black zinc plating, black phosphating, or plain black finish<\/strong>. The exact treatment depends on the customer\u2019s application and corrosion resistance requirement.<\/p>\n

Q6: Can the bolt be customized according to drawings?<\/h3>\n

Yes. We support OEM and ODM production. Customers can provide drawings, samples, dimensions, material requirements, and surface treatment requirements.<\/p>\n

Q7: Is stainless steel better than alloy steel?<\/h3>\n

It depends on the application. Th\u00e9p kh\u00f4ng g\u1ec9<\/strong> offers better corrosion resistance, while alloy steel<\/strong> usually provides higher strength.<\/p>\n

Q8: Can you provide samples before bulk order?<\/h3>\n

Yes. Samples can be provided for size checking, quality confirmation, and surface finish approval before mass production.<\/p>\n

Q9: What packaging options are available?<\/h3>\n

We can provide bulk packing, small box packing, carton packing, pallet packing, or customized packaging with customer labels.<\/p>\n

Q10: What information is needed for quotation?<\/h3>\n

For an accurate quotation, please provide size, length, material, grade, surface treatment, quantity, packaging requirement, and destination port or delivery address.<\/p>","protected":false},"excerpt":{"rendered":"

Product Description Round Head Nip Bolts are high-strength fastening components designed for secure assembly in machinery, equipment, metal structures, automotive parts, and customized industrial applications. With a rounded head design and a threaded shank, these bolts provide reliable clamping force while offering a neat and compact appearance after installation. This product is available in M3, […]<\/p>\n","protected":false},"featured_media":5718,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"fastener-coating":[142,149,34],"fastener-material":[288,42,43],"fastener-type":[53,475],"product_brand":[],"product_cat":[22],"product_tag":[],"class_list":{"0":"post-5717","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"fastener-coating-black-oxide","7":"fastener-coating-anodized","8":"fastener-coating-blackening","9":"fastener-material-alloy-steel","10":"fastener-material-carbon-steel","11":"fastener-material-stainless-steel","12":"fastener-type-bolts","13":"fastener-type-carriage-bolt","14":"product_cat-standard-fasteners","16":"first","17":"instock","18":"shipping-taxable","19":"product-type-simple"},"acf":[],"_links":{"self":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/product\/5717","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=5717"}],"version-history":[{"count":1,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/product\/5717\/revisions"}],"predecessor-version":[{"id":5719,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/product\/5717\/revisions\/5719"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/media\/5718"}],"wp:attachment":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/media?parent=5717"}],"wp:term":[{"taxonomy":"fastener-coating","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/fastener-coating?post=5717"},{"taxonomy":"fastener-material","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/fastener-material?post=5717"},{"taxonomy":"fastener-type","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/fastener-type?post=5717"},{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/product_brand?post=5717"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/product_cat?post=5717"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/product_tag?post=5717"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}