GB/T 28253-2012 Replaced National standards

GB/T 28253-2012 Thread forming tap

Publish Date: 2012-03-09 Implement Date: 2012-07-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 28253-2012

Standard Type: National standards

Standard Status: Replaced

is_force_gb: no

CCS Name: Knives

ICS Name: Taps and punch dowels

Publish Date: 2012-03-09

Implement Date: 2012-07-01

Pages: 20 pages

Scope

This standard specifies the basic requirements for the type and size, thread tolerance, technical requirements, marking, and packaging of extrusion taps (high performance grade and ordinary grade).
This standard applies to extrusion taps for processing ordinary threads (GB/T 192, GB/T 193, GB/T 196, GB/T 197) with a nominal diameter of 1 mm to 27 mm on non-ferrous metal and low-strength ferrous metal parts. When processing threads with extrusion taps, the dimensions of the pre-made holes are referred to in Appendix B.
The thread tolerance zones of the taps in this standard are divided into H1, H2, H3, and H4. Among them, H4 is usually used for non-gear taps.