Partially Threaded Hex Bolt ASTM A213 A249 A269 Plain polish surface DIN 931 Hexagon bolt
Partially Threaded Hex Bolt ASTM A213 A249 A269 Plain polish surface DIN 931 Hexagon bolt
1,Description:
Differences in Thread Distribution
Full Thread: Threads extend from the screw head to the tip, providing extensive engagement area.
Half Thread: Threads cover only the lower half of the shank, with the upper section being a smooth shaft (bare shank) to reduce friction.
Performance Comparison
Secureness:
Full-thread: Dense threading provides strong engagement and more even load distribution, suitable for high-load applications (e.g., thin metal sheets, softwood furniture).
Half-thread: The smooth section reduces material compression and lowers cracking risk, but requires additional fastening with nuts and washers (e.g., battery covers, thick timber).
Installation Experience
Full-thread: High resistance, slow and laborious insertion requiring higher torque tools.
Half-thread: Low resistance, rapid installation with minimal effort (commonly termed ‘quick-thread’).
Suitable Materials.
Full-thread: Thin sheet metal, softwoods (e.g., pine) — multiple threads grip fragile materials securely.
Half-thread: Hardwoods (e.g., oak), thick metals — prevents splitting materials and reduces wear.
2,Applications:
Machinery Manufacturing: Equipment assembly, base mounting
Construction Engineering: Steel structure connections, bridge construction
Automotive Industry: Engine and chassis assembly
Electronics and Electrical: Enclosures, equipment housings
Furniture Manufacturing: Metal frame structures
Pipe Installation: Flange connections
Advantages of Use
✓ Efficient assembly and disassembly - Hexagonal head design facilitates wrench/socket tool operation with high torque transmission efficiency
✓ High load-bearing capacity - Withstands greater loads compared to other fasteners
✓ High standardisation - Complies with international standards (ISO, DIN, GB, etc.), ensuring excellent interchangeability
✓ Wide applicability - Compatible with nuts and washers of varying materials and specifications
✓ Reusable - Performance remains unaffected by normal assembly/disassembly (note fatigue damage)
Available in small packing, carton packing, or pallet configurations to meet your shipping and storage requirements.
Manufactured by JIA SHAN Hardware Company with strict quality control measures and pre-shipment inspection.
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