PRODUCTPartial Thread Hex Bolt DIN 931 / ISO 4014 Carbon Steel & Alloy Steel Fastener for Structural Connections and Machinery
DIN 931 / ISO 4014 Partial Thread Hex Bolts are carbon steel and alloy steel hex head fasteners with a partially threaded shank. Available in M2–M42 sizes and 6 mm–400 mm lengths, they are suitable for structural connections, machinery assembly, equipment installation, and general industrial fastening.
- Standard
- DIN 931 / ISO 4014
- Material
- Carbon Steel / Alloy Steel
Product Details
A Partial Thread Hex Bolt is designed with two functional sections: a smooth, unthreaded shank below the hex head and a threaded portion at the bolt end. During installation, the smooth section passes through the connected components, while the thread engages with a nut to create the final clamping force. This construction is often selected for machinery and structural joints with a defined grip length. It is suitable for joining steel plates, machine parts, frames, brackets, mounting bases, and fabricated components where the bolt body needs to pass through aligned holes before tightening. Produced to DIN 931 and ISO 4014 standards, this bolt type uses a conventional hex head for installation with common spanners and socket tools. Carbon steel and alloy steel materials can be selected for different application conditions. Strength Grade is available upon request.
Product Specifications
| Item | Details |
|---|---|
| Product Name | Partial Thread Hex Bolt |
| Alternative Name | Partially Threaded Hex Head Bolt |
| Standard | DIN 931 / ISO 4014 |
| Bolt Structure | Partial Thread with Smooth Shank |
| Head Type | Hex Head |
| Material | Carbon Steel / Alloy Steel |
| Strength Grade | Available upon request |
| Diameter Range | M2–M42 |
| Length Range | 6 mm–400 mm |
| Customization | Available upon request |
| Compatible Accessories | Hex Nuts, DIN 934 Nuts, Flat Washers, Spring Washers |
| Main Uses | Structural Connections, Machinery, Steel Fabrication, Equipment Installation |
Structural Design Advantage
The partially threaded design makes this bolt suitable for assemblies where the connected parts need to sit around the smooth shank section instead of directly against threads. This configuration is commonly used when fastening metal plates, machine housings, support brackets, structural members, and components with fixed connection thicknesses. The threaded end provides nut engagement for tightening, while the hex head enables quick installation and removal during assembly, servicing, repair, and replacement work.
Material and Supply Options
Carbon steel Partial Thread Hex Bolts are suitable for general construction, fabrication, maintenance, and industrial applications. Alloy steel options can be specified for applications that require a defined mechanical performance level. Buyers can provide their required diameter, length, material, strength grade, surface finish, and quantity when requesting a quotation. Matching nuts and washers can also be supplied to create a complete fastening set.
Typical Uses
Steel plate and structural member connections
Machinery frames, bases, and equipment supports
Industrial brackets and fabricated assemblies
Construction installation and maintenance work
Machine guards, platforms, racks, and enclosures
Railings, frames, metal fixtures, and support components
OEM machinery production and hardware assembly
Industrial distributor and wholesale supply
Ordering Details
To match the bolt to your assembly, please provide the DIN 931 or ISO 4014 requirement, diameter, overall length, material, required strength grade, surface finish, and order quantity. If the bolts will be packed with nuts and washers, please also provide the required accessory combination, packing method, box label requirement, and destination market information.
FAQ
1.What is the main difference between a Partial Thread Hex Bolt and a Full Thread Hex Bolt?
A Partial Thread Hex Bolt has a smooth shank section and threads only at the end. A Full Thread Hex Bolt has threads along the entire shank. Partial-thread bolts are generally selected when the joint design requires an unthreaded bolt body to pass through the connected parts.
2.Which standards apply to this product?
This product is supplied for DIN 931 and ISO 4014 requirements, which are commonly used standards for metric partially threaded hex bolts.
3.What is the available size range?
The available diameter range is M2–M42, and the available length range is 6 mm–400 mm. Customized dimensions are available upon request.
4.Can I specify a strength grade?
Yes. Strength Grade is available upon request. Please include your required grade or mechanical requirement when sending an inquiry.
5.Are carbon steel and alloy steel both available?
Yes. Carbon steel and alloy steel options are available for different application and mechanical requirements.
6.Can you supply nuts and washers together with the bolts?
Yes. Matching hex nuts, including DIN 934 hex nuts, flat washers, spring washers, and other required accessories can be supplied as part of the order.
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Need DIN 931 / ISO 4014 Partial Thread Hex Bolts for machinery or structural assembly?
Send us your required size, length, material, strength grade, quantity, and packing requirement.We can prepare a quotation with matching nuts and washers for your fastening project.