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Description
Technical data for the UNF 7/8-14 die
| Technical data | ||
|---|---|---|
| Nominal Diameter d1 Inches/mm/Decimal | UNF 7/8-14 | |
| Thread Pitch P in Inches and mm | 14 threads per inch | 1.81 mm |
| Thread Diameter mm / Decimal | 22.23 mm / 0.875 in | |
| Outside Diameter d2 | 55 mm | |
| Thickness h1 | 16 mm | |
| Number of Chip Holes | 5 | |
| Required Shaft Diameter | 22.05 mm | |
| Thread angle G | 60° | |
| Thread Standard | ANSI B-1.1 | |
UNF 7/8-14 HSS die – durable tool for large fine threads
UNF 7/8-14 die is used to cut external threads with a diameter of 7/8 inch (22.23 mm) and a pitch of 14 threads per inch. The UNF (Unified National Fine) fine thread standard offers as much as 56% more threads than its UNC 7/8-9 counterpart, providing significantly higher load capacity and excellent resistance to loosening. HSS steel construction ensures tool durability.
Advantages of the UNF 7/8-14 fine thread die
- Fine pitch of 14 threads/inch – 56% more threads than UNC 7/8-9
- Diameter of 22.23 mm – for heavy machine structures and the power industry
- HSS high-speed steel – for machining materials with a tensile strength of up to 800 MPa
- DIN 22568 – European standard for quality and dimensional accuracy
- Thread profile angle 60° – fully compatible with the Unified National system
The die is used in machine building, the automotive industry, and servicing heavy American equipment. The UNF 7/8-14 fine thread provides better sealing and joint stability.
Frequently asked questions
A diameter of 7/8 inch is 22.23 mm. Conversion: 0.875 × 25.4 mm = 22.225 mm ≈ 22.23 mm.
UNF has 14 threads/inch, while UNC has only 9. The fine thread has a 56% higher thread count (5 more threads).
For heavy machine structures, automotive applications, and wherever high load capacity and vibration resistance are required.
Product accessories
Hand Tap UNF 7/8-14 DIN 2181/2 HSS 2B
Reference: 0000006234 In stock > 10 items
€23.68
€29.13 brutto
Thread ring gauge UNF 7/8-14 2A GO NO-GO
Reference: 15419 In stock < 10 items
€57.89
€71.21 brutto
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Shipping
All orders are delivered by courier company GLS. For orders exceeding 369 PLN gross shipping is FREE
| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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