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Full spectrum of industrial fastening solutions | Covering both standard and custom parts

International Standard Certification

High-precision manufacturing process

1-on-1 Customization Service

Full range of products covered

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Round Head Nip Bolts M3 M4 High Strength Stainless Steel & Alloy Steel Black Finish Fasteners

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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, M4, and customized sizes, with material options including stainless steel, alloy steel, and carbon steel. 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.

These bolts are suitable for OEM and ODM production and can be customized according to drawings, samples, or specific project requirements.


Key Features

Feature Description
Product Name Round Head Nip Bolt
Size Range M3, M4, or customized
Material Options Stainless Steel, Alloy Steel, Carbon Steel
Head Type Round Head
Thread Type Metric Thread
Surface Finish Black Finish / Black Oxide / Black Zinc / Black Phosphate
Strength Standard or High Strength Available
Application Machinery, equipment, automotive, metal assembly, custom fastening
Customization Size, material, grade, finish, thread length, packaging

Product Advantages

1. Round Head Design

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.

2. High Strength Performance

Available in alloy steel or high-strength carbon steel, these bolts can provide excellent mechanical performance for demanding fastening applications.

3. Multiple Material Options

Different materials can be selected according to the working environment:

Material Main Advantage
Stainless Steel Better corrosion resistance
Alloy Steel Higher strength and durability
Carbon Steel Cost-effective for general use

4. Black Surface Finish

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.

Surface Treatment Appearance Typical Use
Black Oxide Dark black, thin coating Machinery, tools, indoor use
Black Zinc Plated Black glossy coating Better corrosion resistance than black oxide
Black Phosphate Matte black / dark gray Automotive, machinery, anti-rust oil treatment
Plain Black Natural dark surface General industrial use

Technical Specifications

Item Specification
Product Type Round Head Nip Bolt
Available Sizes M3, M4, customized sizes
Material Stainless Steel / Alloy Steel / Carbon Steel
Grade Standard grade or high strength grade
Head Style Round Head
Thread Metric Thread
Finish Black Finish / Customized Finish
Production Standard Standard or customized according to drawing
Packing Bulk bag, carton, small box, pallet, or custom packaging
Service OEM / ODM Available

Common Applications

Round head nip bolts are widely used in industrial and commercial assembly.

Application Area Usage
Machinery Assembly Equipment fastening and mechanical connection
Automotive Parts Vehicle components and accessory assembly
Metal Fabrication Metal frame, bracket, and structural fixing
Electrical Equipment Cabinet, panel, and device assembly
Furniture & Hardware Customized hardware connection
OEM Projects Customized fastener production according to drawings

Customization Options

We can support different customized requirements for importers, wholesalers, distributors, and project buyers.

Custom Item Available Options
Diameter M3, M4, M5, M6, or custom
Length Standard or customized length
Material Stainless steel, alloy steel, carbon steel
Surface Finish Black oxide, zinc plated, nickel plated, hot dip galvanized, plain
Head Type Round head or customized head shape
Thread Full thread, partial thread, special thread
Packing Neutral packing, customer logo packing, carton, pallet

Why Choose Our Round Head Nip Bolts?

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

Our advantages include:

Advantage Details
OEM/ODM Support Production according to drawings or samples
Multiple Materials Stainless steel, alloy steel, carbon steel available
Flexible Surface Treatment Black finish, zinc plated, hot dip galvanized, and more
Stable Quality Strict inspection for size, thread, and appearance
Export Packaging Suitable for long-distance international shipping
Fast Communication Professional foreign trade service support

FAQ

Q1: What is a round head nip bolt?

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.

Q2: What sizes are available?

Common sizes include M3 and M4, and we can also produce other sizes according to customer requirements.

Q3: What materials can you supply?

We can supply stainless steel, alloy steel, and carbon steel according to the required strength and working environment.

Q4: Is this product high strength?

Yes. High-strength grades can be supplied, especially when using alloy steel or high-strength carbon steel.

Q5: What is the black surface treatment?

The black finish can be customized as black oxide, black zinc plating, black phosphating, or plain black finish. The exact treatment depends on the customer’s application and corrosion resistance requirement.

Q6: Can the bolt be customized according to drawings?

Yes. We support OEM and ODM production. Customers can provide drawings, samples, dimensions, material requirements, and surface treatment requirements.

Q7: Is stainless steel better than alloy steel?

It depends on the application. Stainless steel offers better corrosion resistance, while alloy steel usually provides higher strength.

Q8: Can you provide samples before bulk order?

Yes. Samples can be provided for size checking, quality confirmation, and surface finish approval before mass production.

Q9: What packaging options are available?

We can provide bulk packing, small box packing, carton packing, pallet packing, or customized packaging with customer labels.

Q10: What information is needed for quotation?

For an accurate quotation, please provide size, length, material, grade, surface treatment, quantity, packaging requirement, and destination port or delivery address.

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International Standard Certification

Complies with major global standards such as ISO/DIN/GB/ANSI/JIS

Full range of products covered

Standard parts + customized parts, one-stop solution for all your fastening needs

High-precision manufacturing process

Tolerance control far exceeds industry standards, ranging from 4.8 to 12.9 grades.

1-on-1 Customization Service

Customization based on provided drawings/samples/working conditions; rapid prototyping and mass production delivery.

What Our Customers Say

Trusted by global manufacturers for fastener solutions

BrightBuild Hardware Ltd.
BrightBuild Hardware Ltd.
United Kingdom
XZ FASTENER has been a reliable supplier for our construction fastener orders. The bolts and nuts arrived with good surface finish, accurate sizes, and strong packaging. Communication was clear from quotation to shipment.
Andina Industrial Supply S.A.
Andina Industrial Supply S.A.
Colombia
We ordered different sizes of hex bolts, washers, and nuts. XZ FASTENER helped us confirm the specifications and provided a practical shipping solution. The quality was stable and suitable for our local market.
Falcon Engineering Supplies
Falcon Engineering Supplies
United Arab Emirates
XZ FASTENER understands export business very well. They prepared the quotation, packing details, and documents professionally. The products matched our requirements and the delivery was well organized.
Pacific Bolt & Nut Trading
Pacific Bolt & Nut Trading
Philippines
We appreciate their fast response and flexible support. Even though our order included mixed sizes and different surface treatments, XZ FASTENER handled everything carefully. Good partner for wholesale fasteners.
Monterra Hardware Group
Monterra Hardware Group
Mexico
The galvanized fasteners we received were clean, well packed, and consistent in thread quality. XZ FASTENER gave us clear product photos before shipment, which helped us feel confident about the order.
Eastern Mechanical Parts Co.
Eastern Mechanical Parts Co.
Saudi Arabia
We purchased high-strength bolts and nuts for machinery maintenance. The products were strong, accurate, and packed in export cartons. XZ FASTENER is a serious factory supplier.
GlobalFix Distributors
GlobalFix Distributors
South Africa
XZ FASTENER provides competitive pricing without ignoring quality. Their team helped us compare materials, grades, and surface treatments before confirming the order. This saved us time and reduced purchasing risk.
Nova Tools & Fasteners
Nova Tools & Fasteners
Chile
Our customers care about stable quality and good appearance. The fasteners from XZ FASTENER met our expectations. The cartons, labels, and product sorting were also handled professionally.
Delta Construction Supply
Delta Construction Supply
Kenya
We needed fasteners for construction use in several sizes. XZ FASTENER responded quickly and gave practical advice on packing and shipment. The goods arrived in good condition.
Atlas Industrial Trading
Atlas Industrial Trading
Turkey
The product quality was consistent across different batches. Threads were clean, dimensions were accurate, and the surface treatment looked good. We are satisfied with XZ FASTENER’s factory support.
RedRock Hardware Importers
RedRock Hardware Importers
Australia
XZ FASTENER helped us source both standard and customized fasteners. Their team checked drawings carefully and confirmed details before production. This is very important for B2B buyers like us.
PrimeFix
PrimeFix
Canada
We like working with suppliers who communicate clearly. XZ FASTENER gave us photos, weight information, packing details, and shipping suggestions. The whole process was smooth.

Customer Visits & Certificates

Globally Compliant Standards

All XZ products comply with major global industrial standards and are adaptable to the specifications of different countries and regions.

ISO

International Organization for Standardization (ISO) standards

DIN

German Industrial Standards

GB

Chinese National Standards

ANSI

American National Standards

JIS

Japanese Industrial Standards

Application Areas

Mechanical equipment
manufacturing

Automobiles &
New Energy

Rail transit

Aerospace

Petrochemical

Shipbuilding &
Ocean

New energy photovoltaic /
wind power

Electronics &
Electrical

High-end buildings

Special industrial
equipment

XZ Sales Engineer

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