Fasteners. Surface discontinuities. Nuts

WITHDRAWN published on 1.2.1995

Counterboring for hexagon screws and bolts and hexagon nuts with washer

Standard published on 19.12.1973

Coupling parts. Supporting surfaces

Standard published on 12.9.1984

Fasteners. Couter head screws. Head configuration and gauging (ISO 7721:1983)

Standard published on 1.3.1996

Fasteners. Countersunk flat head screws. Part 2: Penetration depth of cross recesses (ISO 7721-2:1990)

Standard published on 1.6.1996

WITHDRAWN published on 1.2.1950

WITHDRAWN published on 15.2.1988

Fasteners - Prevailing torque hexagon nuts - High nuts (with non-metallic insert)

Standard published on 1.11.2025

WITHDRAWN published on 1.2.1950

Shoulder countersink for slotted countersunk head screws

WITHDRAWN published on 15.2.1988