The Tap,thread Cutting, cataloged under National Stock Number 5136-01-728-9776, 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 Cutting Tools Inc. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 5136-01-728-9776 |
| Primary Part Number | 54391 |
| Item Name | Tap,thread Cutting |
| FSC / FSG | 5136 / 51 — Taps, Dies, and Collets; Hand and Machine |
| Manufacturer | Tapco Cutting Tools Inc |
| Status | ACTIVE |
| Shank Diameter | 0.220 INCHES NOMINAL IN |
| Width Across Flats | 0.165 INCHES NOMINAL IN |
| Thread Structure | REGULAR |
| Thread Length | 0.938 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 05047-ASME B94.9 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Flute Quantity | 4 |
| Thread Size and Series/type Designator | 12.0-28 UNF |
| Starting Chamfer Type | BOTTOMING |
| 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 |
|---|---|
| 54391 PRIMARY | Tapco Cutting Tools Inc (USA) |
| 54391 | Tapco (USA) |
| Reference | Meaning |
|---|---|
| B94.9 | 3/1 Design control — primary reference The American Society of Mechanical Engineers |
| B94.9 12-28 UNF HS G H3 | 5/1 Secondary reference U.S. Government activity |
NSN 5136-01-728-9776 is a Tap,thread Cutting, manufactured by Tapco Cutting Tools Inc, classified under FSC 5136, Taps, Dies, and Collets; Hand and Machine. Status: active.
NSN 5136-01-728-9776 has 2 manufacturer part numbers on file: 54391 (Tapco Cutting Tools Inc), 54391 (Tapco).
1 possible match (shared part number, not a government interchangeability claim): 5136-01-730-9541. Verify interchangeability with system specifications before substitution.
Key specifications for 54391: Shank Diameter: 0.220 INCHES NOMINAL IN; Width Across Flats: 0.165 INCHES NOMINAL IN; Thread Structure: REGULAR; Thread Length: 0.938 INCHES NOMINAL IN. 10 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.