The hex machine screw is a threaded fastener with a hexagonal external head, designed to be tightened using a wrench or socket and typically used in tapped holes or with nuts. Unlike wood screws or self-tapping screws, hex machine screws have uniform machine threads and are intended for precise mechanical assembly.
Hex machine screws are commonly used in machinery manufacturing, electrical equipment, automotive components, and industrial assemblies.
The hex head allows high torque application and secure fastening, making hex machine screws suitable for load-bearing and vibration-resistant assemblies.
Machine threads ensure accurate engagement, consistent clamping force, and reliable performance in metal-to-metal connections.
Hex machine screws can be used with pre-tapped holes or paired with nuts, offering flexibility across different assembly requirements.
Hex machine screws are manufactured in accordance with international standards, including:
DIN 933 / DIN 931
ISO 4017 / ISO 4014
ASTM A307 / ASTM A574 (depending on grade)
GB standards
Metric sizes: M3 – M36
Inch sizes available upon request
Carbon Steel
Alloy Steel
Stainless Steel (SS304 / SS316)
4.8 / 6.8
8.8
10.9
12.9
Zinc plated (white / yellow / blue)
Black oxide
Hot dip galvanized
Plain (stainless steel)
We provide stable quality, competitive pricing, and bulk production capacity, making us a reliable partner for global fastener procurement.
We support:
Custom sizes and lengths
Special thread pitches
Surface coatings and treatments
OEM branding and packaging
Each batch of hex machine screws is inspected for dimensional accuracy, mechanical performance, and surface quality, with certificates and test reports available upon request.
