The Tap,thread Cutting, cataloged under National Stock Number 5136-00-104-4158, is classified within Federal Supply Class 5136 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Stanley Engineered Fastening Llc. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5136-00-104-4158 |
| Primary Part Number | 4FRU |
| Item Name | Tap,thread Cutting |
| FSC / FSG | 5136 / 51 — No Item Name Available |
| Manufacturer | Stanley Engineered Fastening Llc |
| Status | ACTIVE |
| Thread Size and Series/type Designator | 0.250-28 STI |
| Style Designator | SPIRAL POINTED FLUTE |
| Thread Structure | REGULAR |
| Shank Diameter | 0.3165 INCHES MINIMUM AND 0.3180 INCHES MAXIMUM IN |
| Thread Length | 1.062 INCHES MINIMUM AND 1.188 INCHES MAXIMUM IN |
| Nondefinitive Spec/std Data | 1 TYPE AND 2 CLASS |
| Material | STEEL OVERALL |
| Starting Chamfer Type | PLUG |
| Thread Pitch Diameters | +0.2737 TO 0.2742 INCHES IN |
| Criticality Code Justification | AAZE |
| Width Across Flats | 0.234 INCHES MINIMUM AND 0.238 INCHES MAXIMUM IN |
| Flute Quantity | 3 |
| Length | 0.281 INCHES MINIMUM AND 0.343 INCHES MAXIMUM SQUARE END IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 4FRU | Stanley Engineered Fastening Llc (USA) |
| MIL-T-21309 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| MIL-T-21309 TY1CL2 | General Services Administration Federal Supply Service (USA) |
NSN 5136-00-104-4158 is a Tap,thread Cutting, manufactured by Stanley Engineered Fastening Llc, classified under FSC 5136 (No Item Name Available). Status: active.
NSN 5136-00-104-4158 has 3 cross-referenced part numbers: 4FRU (Stanley Engineered Fastening Llc), MIL-T-21309 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-T-21309 TY1CL2 (General Services Administration Federal Supply Service).
There are 12 known substitutes for 5136-00-104-4158: 5136-00-104-4147, 5136-00-104-4159, 5136-00-134-7542 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 4FRU: Special Features: ROUGHING TAP FOR SCREW THREAD INSERT; Overall Length: 2.680 INCHES MINIMUM AND 2.750 INCHES MAXIMUM IN; Thread Size and Series/type Designator: 0.250-28 STI; Style Designator: SPIRAL POINTED FLUTE. 15 total characteristics are documented in the Federal Logistics Information System.