Products Description

DIN931 hexagon head half tooth bolt complies with German industrial standard DIN931, also known as German standard hexagon head half thread bolt. It features a half-thread structure: smooth unthreaded shank near the head and standard thread at the tail. Made of premium carbon steel and alloy steel, widely used for medium and heavy-load structural assembly across machinery, construction and automotive fields.

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Product Advantages

Half Thread High Shear Design

The smooth unthreaded shaft delivers strong shear resistance and precise positioning, resisting lateral shift under cross load. Matched with standard nuts, it realizes dual tension & shear locking, more rigid than full-thread bolts for positioning fastening.

Complete Size Specification Range

Covers M2 to M48 diameter, thread pitch from 0.4mm fine thread to 5mm coarse thread. Fits miniature precision equipment and large heavy industrial structure fastening, with customizable lengths for diverse clamping thickness.

Standard Hex Head Easy Operation

Standard hexagon head fits all common wrenches and torque tools for fast mounting & dismounting. Precise torque control ensures stable clamping force for mass industrial assembly.

Selection Recommendations

Indoor static light load & budget priority: Grade 4.8 with ZP white zinc plating
Medium load, humid indoor and semi-outdoor environment: Grade 5.8 with YZ yellow zinc plating for improved corrosion resistance
Heavy load, dynamic vibration and high safety requirement scenarios: Grade 8.8 high-strength alloy steel bolt
High-temperature operating mechanical components: Select BLACK black oxide surface finish for heat resistance
Shear force dominant positioning connection: Prioritize DIN931 half-thread design to utilize smooth shank shear resistance advantage

Fast delivery for urgent projects

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You can send your demand details via our official website inquiry form. Fill in required information including product model, quantity, material grade, surface treatment and delivery requirements, and our professional sales team will reply to you within 24 working hours.

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