The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-01-169-6763, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. 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 | 5306-01-169-6763 |
| Primary Part Number | 2689475 |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Head Height | 0.187 INCHES NOMINAL IN |
| Fastener Length | 1.313 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | DOD-P-16232 TY M CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Internal Thread Length | 0.250 INCHES NOMINAL COUNTERBORE IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) COUNTERBORE |
| Concentric Hole Depth | 0.437 INCHES MINIMUM AND 0.467 INCHES MAXIMUM IN |
| Internal Thread Direction | RIGHT-HAND COUNTERBORE |
| Thread Length | 0.375 INCHES NOMINAL IN |
| Hardness Rating | 35.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| Threads Per Inch | 32 COUNTERBORE |
| Style Designator | COUNTERBORE THREADED |
| Material Document and Classification | ASTM A322 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A331 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.138 INCHES COUNTERBORE IN |
| Width Between Flats | 0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Internal Thread Class | 2B COUNTERBORE |
| Concentric Hole Diameter | 0.113 INCHES NOMINAL IN |
| Surface Treatment | PHOSPHATE MANGANESE OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 4140 OVERALL |
| Shoulder Length | 0.870 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 2689475 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 5306-01-169-6763 is a Bolt,internally Relieved Body, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-169-6763 has 1 manufacturer part number on file: 2689475 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 2689475: Head Height: 0.187 INCHES NOMINAL IN; Fastener Length: 1.313 INCHES NOMINAL IN; Surface Treatment Document and Classification: DOD-P-16232 TY M CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Internal Thread Length: 0.250 INCHES NOMINAL COUNTERBORE 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.