The Bolt,internal Wrenching, cataloged under National Stock Number 5306-00-879-2127, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Triumph Engine Control Systems Llc. Government technical data includes 26 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-879-2127 |
| Primary Part Number | 5A74009 |
| Item Name | Bolt,internal Wrenching |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Triumph Engine Control Systems Llc |
| Status | ACTIVE |
| Fourth Diameter From Head | 0.230 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN |
| Width Across Flats | 0.187 INCHES MINIMUM AND 0.191 INCHES MAXIMUM IN |
| Head Height | 0.150 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN |
| Fastener Length | 2.230 INCHES MINIMUM AND 2.270 INCHES MAXIMUM IN |
| Thread Length | 0.380 INCHES MINIMUM AND 0.460 INCHES MAXIMUM IN |
| Hole Configuration Style | ROUND LONGITUDINAL HOLE |
| Material Document and Classification | AMS 5637 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.338 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 1.610 INCHES MINIMUM AND 1.630 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 1.710 INCHES MINIMUM AND 1.730 INCHES MAXIMUM IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.280 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.120 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 302 OVERALL |
| Hole Quantity | 4 |
| Distance From Largest Bearing Surface of Head to End of Fourth Diameter | 1.810 INCHES MINIMUM AND 1.850 INCHES MAXIMUM IN |
| Third Diameter From Head | 0.338 INCHES MINIMUM AND 0.340 INCHES MAXIMUM IN |
| Thread Series Designator | UNF |
| Hole Type | DRILLED |
| Hole Diameter | 0.055 INCHES NOMINAL IN |
| Head Diameter | 0.550 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 5A74009 PRIMARY | Triumph Engine Control Systems Llc (USA) |
NSN 5306-00-879-2127 is a Bolt,internal Wrenching, manufactured by Triumph Engine Control Systems Llc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-879-2127 has 1 manufacturer part number on file: 5A74009 (Triumph Engine Control Systems Llc).
Key specifications for 5A74009: Fourth Diameter From Head: 0.230 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN; Width Across Flats: 0.187 INCHES MINIMUM AND 0.191 INCHES MAXIMUM IN; Head Height: 0.150 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN; Fastener Length: 2.230 INCHES MINIMUM AND 2.270 INCHES MAXIMUM IN. 26 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.