The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-01-280-5131, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 19 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-280-5131 |
| Primary Part Number | 4072547 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Head Height | 0.250 INCHES NOMINAL IN |
| Fastener Length | 2.030 INCHES MINIMUM AND 2.050 INCHES MAXIMUM IN |
| Thread Length | 0.530 INCHES NOMINAL IN |
| First Diameter From Head | 0.426 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 1.205 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.438 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 1.525 INCHES NOMINAL IN |
| Head Style | TEE NO. 6 |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.458 INCHES NOMINAL IN |
| Head Length | 0.860 INCHES MINIMUM AND 0.866 INCHES MAXIMUM IN |
| Width Between Flats | 0.640 INCHES MINIMUM AND 0.650 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.080 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Chamfer Angle | 58.0 DEGREES MINIMUM AND 62.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | TITANIUM ALLOY OVERALL |
| Third Diameter From Head | 0.356 INCHES MINIMUM AND 0.360 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 | F |
| Part Number | Manufacturer |
|---|---|
| 4072547 | Rtx Corporation Div Pratt & Whitney (USA) |
| 4072547 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 4072547 | 5/9 Secondary reference M.s. Aerospace Inc. Dba Ms Aerospace Inc |
| 4072547 | 5/9 Secondary reference Acufast Aircraft Products |
NSN 5306-01-280-5131 is a Bolt,externally Relieved Body, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-280-5131 has 2 manufacturer part numbers on file: 4072547 (Rtx Corporation Div Pratt & Whitney), 4072547 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 4072547: Head Height: 0.250 INCHES NOMINAL IN; Fastener Length: 2.030 INCHES MINIMUM AND 2.050 INCHES MAXIMUM IN; Thread Length: 0.530 INCHES NOMINAL IN; First Diameter From Head: 0.426 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN. 19 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.