Fixed calipers:

Threaded plug gauge P/NP..

Made with non-deformable steel, with high wear resistance.

Material: 1.2842

Heat treatment: Hardening + tempering + CRYOGEN hardness: HRC.63+1

Surface treatment: BURNISHING

Thread Control: Metric (ISO)

Unified and American: Series UNC-UNF-UNEF Series 4-6-8-12-16-20-28-32 UN.

Cylindrical pipe thread ISO228/1.