
(continued)
HSS-E-PM: HSS-E: High-Speed High-Speed Steel
| Tapping: | Threading: | Threading: | Steel with Cobalt Alloy | with Cobalt Alloy for |
| Blind Hole | Through Hole | Blind Hole | for Materials with | Materials with Higher |
Higher Hardness Hardness (PM = Power Metal Steel)
Chamfer Form C Chamfer Form D Chamfer Form E
HM: (Carbide) Square Shank
(2–3) (3.5–5) (1.5–2)
3–5 Tapping Helix: Tapping Helix: Tapping Helix: Tapping Helix:
Plug Chamfer (3–5)
Angle: 0° Angle: 10° Angle: L8° Angle: 15°
| Tapping Helix: | Tapping Helix: | Tapping Helix: | Tapping Helix: | Tapping Helix: |
| Angle: L15° | Angle: 25° | Angle: 30° | Angle: 42° | Angle: 45° |
Tapping: Through
DIN Number 371 DIN Number 374 DIN Number 2174 DIN Number 376
Coolant
Flood Coolant: Through Coolant: Manufacturer’s
ISO 2 Class of Fit: 2B
Tapping Axial: Tapping Specs: JIS
Class of Fit: 3B Class of Fit: 6H Class of Fit: 6HX Class of Fit: 6G ANSI
| Unified Course | Unified Fine Thread: | Unified Fine | Unified Course | ISO Metric |
| Thread: J Profile | J Profile | Thread | Thread | Coarse Thread |
ISO Metric Fine Thread
DIN — German Institute for Standardisation