The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-01-320-3946, 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 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-320-3946 |
| Primary Part Number | 4075449 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Extended Washer Thickness | 0.006 INCHES MINIMUM AND 0.016 INCHES MAXIMUM IN |
| Head Height | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Fastener Length | 1.325 INCHES MINIMUM AND 1.335 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | PWA 36545-3 MFR REF SINGLE TREATMENT RESPONSE BEARING SURFACE OF HEAD |
| Surface Treatment Document and Classification | PWA 36545-3 MFR REF SINGLE TREATMENT RESPONSE THREADS |
| Extended Washer Diameter | 0.460 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Thread Length | 0.310 INCHES NOMINAL IN |
| Material Document and Classification | PWA 96 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.194 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.497 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 1.015 INCHES MINIMUM AND 1.025 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | NICKEL ALLOY OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| 4075449 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 4075449 | M.s. Aerospace Inc. Dba Ms Aerospace Inc (USA) |
| 4075449 | Rtx Corporation Div Pratt & Whitney (USA) |
| Reference | Meaning |
|---|---|
| 5306PL1499247 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5306-01-320-3946 is a Bolt,externally Relieved Body, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-320-3946 has 3 manufacturer part numbers on file: 4075449 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 4075449 (M.s. Aerospace Inc. Dba Ms Aerospace Inc), 4075449 (Rtx Corporation Div Pratt & Whitney).
Key specifications for 4075449: Extended Washer Thickness: 0.006 INCHES MINIMUM AND 0.016 INCHES MAXIMUM IN; Head Height: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN; Fastener Length: 1.325 INCHES MINIMUM AND 1.335 INCHES MAXIMUM IN; Surface Treatment Document and Classification: PWA 36545-3 MFR REF SINGLE TREATMENT RESPONSE BEARING SURFACE OF HEAD. 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.