8mm-1.25 x 10mm x 40mm x 20mm Hex Socket Shoulder Screws (4 pcs.)

Diameter: 8mm
Shoulder Length: 20mm
Overall Length: 40mm
Material: Steel
Finish: Plain
Head Style: Socket (5mm Hex)
Thread Size: 1.25mm (Coarse)
Thread Length: 13mm
Hardness: Class 12.9
Type: Shoulder Bolt
Specifications: ISO 7379

Box of 4.

A shoulder screw differs from machine screws in that the shank is ground to a precise diameter, known as the shoulder, and the threaded portion is smaller in diameter than the shoulder. Shoulder bolt specifications call out the shoulder diameter, shoulder length, and threaded diameter; the threaded length is fixed, based on the threaded diameter, and usually quite short. It is usually used for revolving joints in mechanisms and linkages; when used as a guide for the stripper plate in a die set its called a stripper bolt.