Product Description
1/2" UNF High Tensile Alloy Steel Socket Cap Head Bolts – ASTM A574
These 1/2" UNF socket cap head bolts are manufactured from heat-treated high tensile alloy steel to ASTM A574. They feature a self colour finish, a fine 20 TPI thread and a cylindrical head with an internal hexagon socket.
The part threaded design includes an unthreaded shank beneath the head. Suitable for machinery, tooling, equipment repairs and engineering assemblies requiring imperial fine thread fasteners.
Product Specifications
- Thread size: 1/2" UNF
- Thread designation: 1/2"-20 UNF
- Threads per inch: 20 TPI
- Nominal thread diameter: 0.500" / 12.7mm
- Material: Heat-treated high tensile alloy steel
- Strength specification: ASTM A574
- Metric equivalent: 12.9
- Finish: Self colour
- Head style: Cylindrical socket cap head
- Allen key size: 3/8"
- Thread coverage: Part threaded with shank
- Length measurement: From beneath the head to the tip
- Lengths and pack quantities: Choose from the available product options
The metric equivalent shown is a strength comparison. These imperial bolts are specified to ASTM A574.
Installation
Use with a matching 1/2"-20 UNF nut or tapped hole. Check the required thread engagement and shank length before fitting. Tighten using a correctly fitting 3/8" Allen key or hexagon bit and follow the assembly manufacturer's torque requirements.
Apply suitable corrosion protection where moisture exposure is expected.
Standards
- ASME B18.3: Imperial socket head cap screw dimensions
- ASTM A574: Alloy steel socket head cap screw material and mechanical properties
