The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-01-148-7572, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 21 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 | 5306-01-148-7572 |
| Primary Part Number | 65391-11740-101 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Head Height | 0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN |
| Fastener Length | 7.255 INCHES MINIMUM AND 7.265 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-S-365 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.785 INCHES NOMINAL IN |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | MIL-S-5000 COND C MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.625 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 5.062 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 6.100 INCHES NOMINAL IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.500 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Width Between Flats | 1.090 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.800 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 3 |
| Surface Treatment | SILVER OVERALL |
| Thread Quantity Per Inch | 18 |
| Material | STEEL COMP 4340 OVERALL |
| Third Diameter From Head | 0.625 INCHES MINIMUM IN |
| 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 | X |
| Part Number | Manufacturer |
|---|---|
| 65391-11740-101 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
NSN 5306-01-148-7572 is a Bolt,externally Relieved Body, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-148-7572 has 1 manufacturer part number on file: 65391-11740-101 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for 65391-11740-101: Head Height: 0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN; Fastener Length: 7.255 INCHES MINIMUM AND 7.265 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-S-365 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.785 INCHES NOMINAL IN. 21 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.