The Tap,thread Cutting, cataloged under National Stock Number 5136-01-630-1987, is classified within Federal Supply Class 5136 (Taps, Dies, and Collets; Hand and Machine) of the Hand Tools group. The manufacturer of record is Tapco. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Tap,thread Cutting |
| FSC / FSG | 5136 — Taps, Dies, and Collets; Hand and Machine (FSG 51) |
| Manufacturers | Tapco (CAGE 7X007) |
| Parameter | Value |
|---|---|
| NSN | 5136-01-630-1987 |
| Primary Part Number | 54448 |
| Item Name | Tap,thread Cutting |
| FSC / FSG | 5136 / 51 — Taps, Dies, and Collets; Hand and Machine |
| Manufacturer | Tapco |
| Status | ACTIVE |
| Thread Structure | REGULAR |
| Style Designator | STRAIGHT FLUTE |
| Thread Direction | RIGHT-HAND |
| Flute Quantity | 4 |
| Material | STEEL OVERALL |
| Thread Size and Series/type Designator | 0.250-20 UNIFIED NATIONAL COARSE (UNC) |
| Starting Chamfer Type | TAPER |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 54448 PRIMARY | Tapco (USA) |
| Reference | Meaning |
|---|---|
| 11B5090651-37 | 7/2 Vendor item drawing reference Devcom Chemical Biological Center Dba Chemical Biological Center Div U.s. Dept of Army |
NSN 5136-01-630-1987 is a Tap,thread Cutting, manufactured by Tapco, classified under FSC 5136, Taps, Dies, and Collets; Hand and Machine. Status: active.
NSN 5136-01-630-1987 has 1 manufacturer part number on file: 54448 (Tapco).
1 possible match (shared part number, not a government interchangeability claim): 2540-01-642-6637. Verify interchangeability with system specifications before substitution.
Key specifications for 54448: Thread Structure: REGULAR; Style Designator: STRAIGHT FLUTE; Thread Direction: RIGHT-HAND; Flute Quantity: 4. 8 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.