{{ name }}
Article no. {{ combinedCodeWithHighlight }}
Article code:
EAN / GTIN:
Manufacturer number:
Machine tap 1/4-28
Article no.: 138000 1/4-28
Article code:
- Thread type: UNF
- Flank angle: 60
- Tool material: HSS E
- Standard: DIN 371
- Tolerance class: 2B
Product details
Technical Data
| Thread size | 1/4-28 UNF | |
| Coating | uncoated | |
| Thread type | UNF | |
| Flank angle | 60 degrees | |
| Tool material | HSS E | |
| Standard | DIN 371 | |
| Tolerance class | 2B | |
| Taper lead form | C | |
| Helix angle | 20 degrees | |
| Shank | Plain shank with h9 | |
| Through-coolant | no | |
| Application for type of drilling | up to 2×D for blind holes | |
| Cutting direction | right-hand | |
| Thread pitch | 0.907 mm | |
| Threads per inch | 28 | |
| Thread ⌀ | 6.35 mm | |
| Overall length L | 80 mm | |
| Shank ⌀ Ds | 7 mm | |
| Shank square □ | 5.5 mm | |
| Tapping hole ⌀ | 5.5 mm | |
| Type of threading tool | Machine tap for conventional machining | |
| Number of clamping slots | 3 | |
| Colour ring | without | |
| Number of cutting edges Z | 3 | |
| Thread depth | 12.7 mm | |
| Type of product | Tap |
Identification numbers & Classifications
| Article number | 138000 1/4-28 | |
| EAN / GTIN | 4045197080318 | |
| Manufacturer number | 138000 1/4-28 |
Application Table
N
13
P
15
P
15
Description
Version:
Sturdy design, with 20° right-hand chip flutes.
HSS-E
Application:
For UNF uniform fine threads ASME − B1.1.
Downloads & documents
Compare with similar products
This article |
Recommendations |
||||
|---|---|---|---|---|---|
Machine tap 1/4-28 |
|||||
| Taper lead form | C | C | C | C | C |
| Flank angle | 60 | 60 | 60 | 60 | 60 |
| Through-coolant | no | no | no | no | no |
| Standard | DIN 371 | DIN 371 | DIN 371 | DIN 371 | DIN 371 |
| Shank square □ | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 |
| Tolerance class | 2B | 1B ;2B ;2B +0.05 ;2B +0.10 ;2B +0.20 ;3B | 1B ;2B ;2B +0.05 ;2B +0.10 ;2B +0.20 ;3B | 1B ;2B ;2B +0.05 ;2B +0.10 ;2B +0.20 ;3B | 2B |
| Shank ⌀ Ds | 7 | 7 | 7 | 7 | 7 |