The Tap,thread Cutting, cataloged under National Stock Number 5136-01-246-0247, is classified within Federal Supply Class 5136 (Taps, Dies, and Collets; Hand and Machine) of the Hand Tools group. The manufacturer of record is Jarvis Cutting Tools Inc. Government technical data includes 15 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5136-01-246-0247 |
| Primary Part Number | 121538 |
| Item Name | Tap,thread Cutting |
| FSC / FSG | 5136 / 51 — Taps, Dies, and Collets; Hand and Machine |
| Manufacturer | Jarvis Cutting Tools Inc |
| Status | ACTIVE |
| Shank Diameter | 0.318 INCHES MINIMUM IN |
| Width Across Flats | 0.191 INCHES NOMINAL IN |
| Length | 0.312 INCHES NOMINAL SQUARE END IN |
| Thread Structure | REGULAR |
| Thread Length | 1.13 INCHES MINIMUM IN |
| Style Designator | STRAIGHT FLUTE |
| Thread Pitch Diameters | +0.2273 TO 0.2278 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Departure From Cited Designator | AS MODIFIED BY STARTING CHAMFER TYPE |
| Specification/standard Data | 05047-ASME B94.9 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Flute Quantity | 4 |
| Material | STEEL OVERALL |
| Thread Size and Series/type Designator | 0.250-28 UNF |
| 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 |
|---|---|
| 121538 | Jarvis Cutting Tools Inc (USA) |
| Reference | Meaning |
|---|---|
| GGG-T-70 | 5/9 Secondary reference U.S. Government activity |
| B94.9 1/4-28 UNF HS G H2 | 5/1 Secondary reference U.S. Government activity |
| B94.9 | 3/1 Design control — primary reference The American Society of Mechanical Engineers |
| GGG-T-70 TY1SEBSTA | 5/9 Secondary reference U.S. Government activity |
NSN 5136-01-246-0247 is a Tap,thread Cutting, manufactured by Jarvis Cutting Tools Inc, classified under FSC 5136, Taps, Dies, and Collets; Hand and Machine. Status: active.
NSN 5136-01-246-0247 has 1 manufacturer part number on file: 121538 (Jarvis Cutting Tools Inc).
1 possible match (shared part number, not a government interchangeability claim): 5136-01-729-1720. Verify interchangeability with system specifications before substitution.
Key specifications for 121538: Shank Diameter: 0.318 INCHES MINIMUM IN; Width Across Flats: 0.191 INCHES NOMINAL IN; Length: 0.312 INCHES NOMINAL SQUARE END IN; Thread Structure: REGULAR. 15 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.