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Thread size | 1/4-20 UNC | |
Coating | uncoated | |
Thread type | UNC | |
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 | 1.27 mm | |
Threads per inch | 20 | |
Thread ⌀ | 6.35 mm | |
Overall length L | 80 mm | |
Shank ⌀ Ds | 7 mm | |
Shank square □ | 5.5 mm | |
Tapping hole ⌀ | 5.1 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 |
Article number | 137860 1/4-20 | |
EAN / GTIN | 4045197080189 | |
Manufacturer number | 137860 1/4-20 |
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![]() ![]() Machine tap 1/4-20 |
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Colour ring | without | without | without | without | without |
Thread pitch | 1.27 | 1.27 | 1.27 | 1.27 | 1.27 |
Through-coolant | no | no | no | no | no |
Tapping hole ⌀ | 5.1 | 5.11 | 5.11 | 5.11 | 5.1 |
Shank | Plain shank with h9 | Plain shank with h9 | Plain shank with h9 | Plain shank with h9 | Plain shank with h9 |
Shank ⌀ Ds | 7 | 7 | 7 | 7 | 7 |
Type of product | Tap | Tap | Tap | Tap | Taps |