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High-precision manufacturing process

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Stainless Steel DIN931 Hex Head Bolts | Partial Thread Metric Fasteners | Corrosion-Resistant Industrial Bolts

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Product Description

Product Overview

These Stainless Steel DIN931 Hex Head Bolts (Partial Thread) are designed for precision and heavy-duty fastening in industrial, mechanical, and construction applications. Made from high-quality stainless steel, these bolts provide excellent corrosion resistance, durability, and long-lasting performance in both indoor and outdoor environments. The partial thread design allows for better shear strength and alignment in structural and mechanical assemblies. Manufactured according to DIN931 standards, these hex head bolts are ideal for automotive, machinery, marine, and general-purpose projects.


Key Features

  • Premium Stainless Steel: Resistant to rust, corrosion, and wear, ensuring long service life.
  • Partial Thread Design: Offers enhanced shear strength and precise alignment for secure fastening.
  • DIN931 Standard: Hex head bolts manufactured to strict German standards for consistent quality.
  • Hex Head: Compatible with wrenches, spanners, or socket tools for easy installation.
  • Versatile Use: Ideal for industrial machinery, automotive, marine applications, construction, and DIY projects.

Specifications Table

Specification Details
Material Stainless Steel
Thread Type Partial Thread, Metric
Standard DIN931
Bolt Head Type Hexagonal
Surface Finish Polished / Corrosion-Resistant
Sizes Available Various Metric Sizes
Recommended Tools Wrench, Socket, Torque Wrench
Applications Industrial, Mechanical, Construction, Automotive, Marine

Applications

  1. Industrial Machinery: Secure parts where partial thread provides higher shear strength.
  2. Automotive: Engines, chassis, and suspension components assembly.
  3. Construction & Structural Work: Metal frameworks and machinery mounting.
  4. Marine & Outdoor Use: Resistant to corrosion in humid and marine environments.
  5. DIY & Workshop Projects: High-strength fastening for professional and hobbyist applications.

FAQ (Frequently Asked Questions)

Q1: What is a partial thread bolt?
A1: Partial thread bolts are threaded only on part of the shaft, providing better shear strength and alignment in assemblies where the unthreaded shank bears load.

Q2: What does DIN931 standard mean?
A2: DIN931 specifies hex head bolts with partial threads and precise dimensions, ensuring consistent quality and reliable performance.

Q3: Can these bolts be used with standard nuts?
A3: Yes, match the bolt thread with the corresponding metric nuts for secure fastening.

Q4: Are these suitable for outdoor or marine environments?
A4: Yes, made from stainless steel, these bolts resist corrosion, rust, and environmental exposure.

Q5: How should I install these hex head bolts?
A5: Use a wrench, socket, or torque wrench to tighten to the recommended torque. Ensure proper alignment to prevent thread damage.

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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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