UNI 6989-1971
Measuring instruments. Setting plugs for go and not go screw calliper gauges for ISO metric threads with nominal diameter above 18 to 50 mm.

Standard No.

UNI 6989-1971

Release Date

1971

Published By

IT-UNI

Latest

UNI 6989-1971

Scope

Example and table with designation. Material: 88 mnv 8 ku UNI 2955-68 hardened and tempered steel with HRC hardness greater than or equal to 62, i.e. steel with equivalent or greater dimensional stability and wear resistance.

UNI 6989-1971 history

• 1971 UNI 6989-1971 Measuring instruments. Setting plugs for go and not go screw calliper gauges for ISO metric threads with nominal diameter above 18 to 50 mm.