The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-00-520-2751, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Cm Manufacturing Inc Dba Cm Manufacturing Inc. Government technical data includes 17 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-520-2751 |
| Primary Part Number | 4P03023-103A |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Cm Manufacturing Inc Dba Cm Manufacturing Inc |
| Status | ACTIVE |
| Head Height | 0.270 INCHES NOMINAL IN |
| Fastener Length | 4.080 INCHES NOMINAL IN |
| Thread Length | 0.658 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN |
| Style Designator | CONCENTRIC HOLE UNTHREADED |
| Material Document and Classification | MIL-S-5000 COND E1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 1.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 2.110 INCHES MINIMUM AND 2.124 INCHES MAXIMUM IN |
| Shoulder Diameter | 1.623 INCHES MINIMUM AND 1.624 INCHES MAXIMUM IN |
| Concentric Hole Diameter | 0.625 INCHES MINIMUM AND 0.627 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 195000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 12 |
| Material | STEEL OVERALL |
| Shoulder Length | 3.132 INCHES MINIMUM AND 3.142 INCHES MAXIMUM 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 |
|---|---|
| 4P03023-103A | Cm Manufacturing Inc Dba Cm Manufacturing Inc (USA) |
| Reference | Meaning |
|---|---|
| 4P03023-103A | 3/2 Design control — primary reference U.S. Government activity |
| 4P03023-101B | 5/9 Secondary reference U.S. Government activity |
NSN 5306-00-520-2751 is a Bolt,internally Relieved Body, manufactured by Cm Manufacturing Inc Dba Cm Manufacturing Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-520-2751 has 1 manufacturer part number on file: 4P03023-103A (Cm Manufacturing Inc Dba Cm Manufacturing Inc).
Key specifications for 4P03023-103A: Head Height: 0.270 INCHES NOMINAL IN; Fastener Length: 4.080 INCHES NOMINAL IN; Thread Length: 0.658 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN; Style Designator: CONCENTRIC HOLE UNTHREADED. 17 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.