Hex nut DIN934-1987 (A/B accuracy classification)

1. Class A (high precision model)

Tolerances on hexagonal edges, thickness, threads, and end face verticality are strictly tightened, resulting in high processing accuracy; thread burrs and end face flatness are fully inspected and controlled, making it suitable for automated assembly line assembly.

2. Applicable scenarios

✅ Grade A: Precision instruments, auto parts, hydraulic equipment, new energy precision modules, imported equipment supporting, working conditions with strict requirements on assembly clearance and concentricity.

Steel structure, photovoltaic brackets, door and window guardrails, factory equipment, furniture hardware, infrastructure projects.

3. Differences in appearance and workmanship

Grade A: The corners are neatly chamfered, the threads are smooth and burr-free, there are no strict marking requirements, and the basic locking strength is met.

2. Raw materials and production processes

304 stainless steel series

The stainless steel wire cold heading is formed in one piece, 6H precision tapping, mirror polished, acid and alkali resistant, and long-term rust resistance in coastal humid environments.

low-carbon steel series

Cold heading forming, precision tapping, zinc plated / black oxide treatment, indoor drying equipment, steel structure.

The hexagonal thickness and opposite side dimensions are strictly in accordance with DIN934 drawings, and the body is thickened, and the load-bearing capacity is better than that of thin GB52 nuts.

3. Product core advantages

Thickened body with high load-bearing capacity: standard thickened thickness, stronger resistance to vibration and tensile force, and resistant to loosening after long-term use.

Global German standard interchange: DIN934 international standard, can match all domestic and imported metric bolts, and has strong versatility.

Multi-material corrosion-resistant solution: stainless steel is suitable for outdoor corrosive environments; zinc plated carbon steel is suitable for indoor conventional assembly.

4. Quality control and warehousing supporting services

All specifications are in stock, with 48-hour rapid dispatch. We can undertake small-batch samples, full-container export, and large-scale project centralized procurement.

The factory is sorted according to accuracy, and the thread passage and stop gauges are fully inspected. The dimensions are benchmarked against DIN934 tolerance standards, and defective products with deformation and thread patterns are eliminated.

It can be packaged in complete sets with a full range of bolts, drill points, self-tapping screws, and various types of special-shaped nuts; it supports long-term supply of nonstandard thickness, special pitch, and customized coated nuts.