The Tap,thread Cutting, cataloged under National Stock Number 5136-00-889-6978, is classified within Federal Supply Class 5136 (Taps, Dies, and Collets; Hand and Machine) of the Hand Tools group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5136-00-889-6978 |
| Item Name | Tap,thread Cutting |
| FSC / FSG | 5136 / 51 — Taps, Dies, and Collets; Hand and Machine |
| Status | ACTIVE |
| Shank Diameter | 2.247 INCHES MINIMUM AND 2.250 INCHES MAXIMUM IN |
| Width Across Flats | 1.679 INCHES MINIMUM AND 1.687 INCHES MAXIMUM IN |
| Length | 1.188 INCHES MINIMUM AND 1.312 INCHES MAXIMUM SQUARE END IN |
| Thread Structure | REGULAR |
| Thread Length | 2.437 INCHES MINIMUM AND 2.687 INCHES MAXIMUM IN |
| Style Designator | STRAIGHT FLUTE |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 05047-ASME B94.9 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Flute Quantity | 8 |
| Material | STEEL OVERALL |
| Thread Size and Series/type Designator | 2.500-8 NPT |
| Starting Chamfer Type | PLUG |
| Thread Forming Method | GROUND |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| GGG-T-581 TY1CL1 | 5/9 Secondary reference U.S. Government activity |
| B94.9 | 3/1 Design control — primary reference The American Society of Mechanical Engineers |
| GGG-T-581 | 5/9 Secondary reference U.S. Government activity |
NSN 5136-00-889-6978 is a Tap,thread Cutting, classified under FSC 5136, Taps, Dies, and Collets; Hand and Machine. Status: active.
Key specifications for 5136-00-889-6978: Shank Diameter: 2.247 INCHES MINIMUM AND 2.250 INCHES MAXIMUM IN; Width Across Flats: 1.679 INCHES MINIMUM AND 1.687 INCHES MAXIMUM IN; Length: 1.188 INCHES MINIMUM AND 1.312 INCHES MAXIMUM SQUARE END IN; Thread Structure: REGULAR. 13 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.