GB/T 28253-2025 Active
GB/T 28253-2025 Thread forming tap
Abstract
This document specifies the types and dimensions of extrusion taps, thread tolerances, technical requirements, inspection methods, and marking and packaging. This document is applicable 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- to medium-strength ferrous metal parts. Note 1: For explanations on thread tolerances of taps, see Appendix A. Note 2: For dimensions of thread pre-machined holes, see Appendix B. Note 3: For the cross-sectional shape and chamfering of taps, see Appendix C. Note 4: For the relationship between this document and the ISO 13399 (all parts) symbols, see Appendix D.
General Product Information
| Document Type | National standards |
|---|---|
| Standard Status | Active |
| Standard Code | GB/T 28253-2025 |
| CCS | Knives |
| ICS | Taps and punch dowels |
| Implement Date | 2026-05-01 |