The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-00-281-2863, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 21 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-281-2863 |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.120 INCHES NOMINAL IN |
| Fastener Length | 1.830 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | LC+77-1061,CLASS 2,TYPE 2,FSCM 36659 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Concentric Hole Depth | 1.190 INCHES NOMINAL IN |
| Thread Length | 0.427 INCHES MINIMUM AND 0.466 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.110 INCHES MINIMUM AND 0.115 INCHES MAXIMUM FIRST HOLE IN |
| Style Designator | CONCENTRIC HOLE UNTHREADED |
| Material Document and Classification | MIL-S-6758,COND D MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.053 INCHES MINIMUM AND 1.066 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.748 INCHES MINIMUM AND 0.749 INCHES MAXIMUM IN |
| Concentric Hole Diameter | 0.374 INCHES MINIMUM AND 0.381 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Test Data Document | 36659-LC+72-1072 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 4130 OVERALL |
| Shoulder Length | 1.310 INCHES MINIMUM AND 1.320 INCHES MAXIMUM IN |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.640 INCHES NOMINAL FIRST HOLE IN |
| Head Diameter | 1.250 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 |
| Reference | Meaning |
|---|---|
| 1292922-103 | 3/2 Design control — primary reference U.S. Government activity |
| 1292922-101 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-00-281-2863 is a Bolt,internally Relieved Body, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-281-2863: Head Height: 0.120 INCHES NOMINAL IN; Fastener Length: 1.830 INCHES NOMINAL IN; Surface Treatment Document and Classification: LC+77-1061,CLASS 2,TYPE 2,FSCM 36659 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Concentric Hole Depth: 1.190 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.