The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-00-321-4622, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 9 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-321-4622 |
| Primary Part Number | 68A450752-2001 |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.156 INCHES NOMINAL IN |
| Fastener Length | 3.530 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | PS13102 FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.355 INCHES MINIMUM AND 0.365 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.141 INCHES MINIMUM AND 0.151 INCHES MAXIMUM FIRST HOLE IN |
| Style Designator | CONCENTRIC HOLE UNTHREADED |
| Material Document and Classification | MIL-S-5626 COND B MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | ROUND W/WRENCH FLATS CHAMFERED |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.870 INCHES NOMINAL IN |
| Shoulder Diameter | 0.623 INCHES MINIMUM AND 0.624 INCHES MAXIMUM IN |
| Concentric Hole Diameter | 0.280 INCHES NOMINAL IN |
| Surface Treatment | CHROMIUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 4140 OVERALL |
| Shoulder Length | 3.090 INCHES MINIMUM AND 3.100 INCHES MAXIMUM IN |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 3.375 INCHES NOMINAL FIRST HOLE IN |
| Head Diameter | 1.000 INCHES NOMINAL 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 |
|---|---|
| 68A450752-2001 | Hdi Landing Gear Usa Inc (USA) |
| 68A450752-2001 | Machine Specialties, Llc (USA) |
| 68A450752-2001 | Alta Precision Inc (CAN) |
| 68A450752-2001 | Preci-Manufacturing, Incorporated (USA) |
| 68A450752-2001 | Quality Socket Screw Manufacturing Corp (USA) |
| 68A450752-2001 | Es3 Prime Logistics Group Inc Dba Es3 Plg (USA) |
| 68A450752-2001 | Heroux-Devtek Inc (CAN) |
| 68A450752-2001 | Cm Manufacturing Inc Dba Cm Manufacturing Inc (USA) |
| 68A450752-2001 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 68A450752-2001 | 5/9 Secondary reference All Tools, Inc. Dba E2 Precision Products |
| 68A450752-2001 | 5/9 Secondary reference U.S. Government activity |
| 68A450752-2001 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-00-321-4622 is a Bolt,internally Relieved Body, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-321-4622 has 9 manufacturer part numbers on file: 68A450752-2001 (Hdi Landing Gear Usa Inc), 68A450752-2001 (Machine Specialties, Llc), 68A450752-2001 (Alta Precision Inc), 68A450752-2001 (Preci-Manufacturing, Incorporated), 68A450752-2001 (Quality Socket Screw Manufacturing Corp) and 4 more.
Key specifications for 68A450752-2001: Head Height: 0.156 INCHES NOMINAL IN; Fastener Length: 3.530 INCHES NOMINAL IN; Surface Treatment Document and Classification: PS13102 FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.355 INCHES MINIMUM AND 0.365 INCHES MAXIMUM 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.