SOCKET HEAD CAP SCREW
An Allen bolt is a type of fastener with a hexagonal (six-sided) recess in the head, which is designed to be tightened or loosened using an Allen wrench (or hex key). This design makes Allen bolts ideal for applications with limited space or where a secure, high-torque fastening is needed. They are commonly used in machinery, furniture assembly, bicycles, and other applications requiring precise and compact fasteners.
Dimension Standard
Standard
Grade
Size
DIN 934, ISO 4032, ISO 4033
ISO 3506-2
A2-50, A2-70, A2-80, A4-50, A4-70, A4-80
M27 to M64
DIN 439, ISO 4035
ISO 3506-2
A2-50, A2-70, A2-80, A4-50, A4-70, A4-80
M27 to M64
ASME B18.2.2, ASME B18.2.4.6M, ASME B18.2.4.5M
ASTM A194
Gr.8, Gr.8M, Gr.8MA, 2H, 2HM, 7, 7M, 7L
M27 to M64, 1/2" to 3"
ASME B18.2.2, ASME B18.2.4.6M, ASME B18.2.4.5M
ASTM A563
Grade A, Grade B
M27 to M64, 1" to 3"
ASME B18.2.2, ASME B18.2.4.6M, ASME B18.2.4.5M
ISO 898-2
CL8, CL10, CL12
M27 to M64, 1" to 3"