DIN931 Half Thread Hex Bolt

The unthreaded polished rod section provides excellent straightness, shear resistance and structural positioning accuracy, while the standard threaded section realizes stable nut locking. With strict DIN industrial tolerance standards, high mechanical strength and strong structural stability, Wanluo supplier’s high quality DIN931 Half Thread Hex Bolt is suitable for high-precision assembly, heavy-load connection and structural fixed scenarios that require both positioning and fastening functions.

Standardized Die Forging & Precision Thread Rolling Craft

Our DIN931 Half Thread Hex Bolt are manufactured in strict accordance with DIN931 international standard specifications, adopting integral die forging and precision thread rolling forming technology. The outer hex head is precisely stamped with standard six-sided dimensions, ensuring perfect fit with standard sleeve tools and uniform torque transmission without slipping. The smooth shank retains complete metal fiber structure after finishing, with high rigidity and strong shear resistance, effectively avoiding rod deformation and lateral displacement during heavy-load operation. The half-section thread is rolled with high precision, featuring full tooth shape, uniform pitch and smooth meshing, completely compliant with DIN standard matching nuts and gaskets. After integral heat treatment, the bolt achieves stable grade strength such as 4.8, 8.8, 10.9 and 12.9. Multiple surface anti-corrosion treatments ensure excellent rust resistance and environmental adaptability for indoor and outdoor industrial applications.

Product Parameter

1. Dual positioning and locking function. The biggest feature of DIN931 bolt is the half-thread smooth rod design. The unthreaded shank ensures precise hole positioning and high lateral shear resistance, avoiding assembly deviation and component shaking, which cannot be replaced by full-thread bolts in high-precision structural assembly.

3. Standard universal compatibility. Fully compliant with DIN industrial standards, all dimensions, thread pitch and tolerance are strictly standardized. It can perfectly match various DIN standard nuts, gaskets and reserved holes, with strong interchangeability, suitable for global industrial equipment supporting and engineering project construction.

5. Diversified environmental adaptability. With multiple surface anti-corrosion processes, the bolt can adapt to indoor dry assembly, outdoor open-air operation, humid environment and light corrosive working conditions. It has long service life and stable batch supply capacity, being the most widely used structural bolt in industrial manufacturing.

FAQ

Q1: What is the difference between DIN931 and DIN933 bolts? 

A1: DIN931 is a half-thread hex bolt with smooth shank for high shear resistance and positioning; DIN933 is a full-thread hex bolt, mainly used for ordinary fastening scenarios. DIN931 is more suitable for structural load-bearing and high-precision assembly occasions.

Q3: Is DIN931 Half Thread Hex Bolt suitable for outdoor engineering? 

A3: Yes. Equipped with hot-dip galvanizing and color zinc passivation treatments, it has excellent weather resistance and corrosion resistance, which can adapt to long-term outdoor wind and rain erosion and ensure stable structural connection.

Q5: Support batch customization and project matching? 

A5: Yes. We support non-standard length customization, thread proportion adjustment, special surface anti-rust treatment and laser logo marking, and can provide complete qualification reports for engineering bidding and acceptance.