Reliable Mechanical Performance
Manufactured according to strict dimensional and mechanical requirements for consistent installation and long service life.
DIN 931 Hexagon Head Bolts Grades A and B Partially Threaded
- Standard: DIN 931
- Material: SUS304, SUS316, SUS410, Carbon Steel
- Thread Type: Metric Machine Thread
- Thread Size: M1.6-M39
- Surface Treatment: Zinc Plated, Passivated, Plain, Custom Coating
- Min Order: 5000pcs
- Sample: Free sample (after quote)
- Delivery time: 30 – 45 Days
Product Overview
Product Application
DIN 931 Hexagon Head Bolts are metric hexagon head bolts with a partially threaded shank, designed for high-strength clamping applications where secure positioning and load distribution are required. The unthreaded shank section provides improved shear resistance and better joint alignment compared with fully threaded bolts.
DIN 931 has been widely used in mechanical engineering, steel structures, automotive manufacturing, and industrial equipment assembly. The standard has been replaced by ISO 4014, while DIN 931 dimensions and specifications remain commonly referenced in global fastener markets.
Draw
Specification
Key Design Features
1. Partial Thread Design for Strong Clamping
The unthreaded shank section increases bearing strength and improves load distribution, making DIN 931 bolts ideal for structural joints and applications requiring high shear resistance.
2. High Torque Hexagonal Head
The standard hex head allows easy installation with wrenches or sockets while providing excellent torque transmission for secure fastening.
3. Wide Material & Strength Options
Available in multiple steel grades and stainless steel materials to meet different requirements for strength, corrosion resistance, and environmental performance.
DIN 931 vs DIN 933
Product Advantages
Excellent Joint Stability
The partial thread design reduces movement between connected components and improves connection reliability.
Flexible Industrial Applications
Suitable for machinery, automotive, construction, steel structures, and heavy equipment assembly.
Common Questions
What is a DIN 931 bolt?
DIN 931 is a hexagon head bolt with a partial thread and an unthreaded shank section.
What is the difference between DIN 931 and DIN 933?
DIN 931 has a partial thread, while DIN 933 is fully threaded.
What strength grades are available for DIN 931 bolts?
Common grades include 8.8, 10.9, and 12.9.
Can DIN 931 bolts be customized?
Yes. Size, material, coating, marking, and packaging can be customized.
