Hex Socket Head Cap Screw
machinery and equipment assembly; details per RFQ

Hex socket head cap screws use an internal hex drive and a cylindrical head. They suit machinery, fixtures and equipment assemblies where a side wrench has little room but the driver can reach the screw axially. Whether the head needs a counterbore and whether it clears nearby parts should be checked on the joint drawing.
What to check during selection
Start with the product standard or drawing, then confirm thread diameter and pitch, length, head clearance, property class or material, finish and thread tolerance. For a preload-sensitive joint, state the mating thread, washer, lubrication condition and tightening specification.
What to send with the RFQ
Provide the standard and edition or a dimensioned drawing, size, length, material or property class, finish, quantity, packaging and inspection-document requirements. Available dimensions, classes, coatings and documents are confirmed for each enquiry rather than assumed on this page.
Compare the head styles
See hex socket head cap screws vs countersunk screws for a practical comparison. Changing the head style alters both seating and clearance, so critical substitutions need a design review.











































