The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-00-142-4932, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 26 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-142-4932 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Fourth Diameter From Head | 0.253 INCHES MINIMUM AND 0.258 INCHES MAXIMUM IN |
| Head Height | 0.180 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN |
| Fastener Length | 3.460 INCHES MINIMUM AND 3.480 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Precious Material | SILVER |
| Thread Length | 0.440 INCHES MINIMUM AND 0.460 INCHES MAXIMUM IN |
| Hardness Rating | 37.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | -3603,FSCM 91547 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.311 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 1.520 INCHES MINIMUM AND 1.540 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 1.720 INCHES MINIMUM AND 1.740 INCHES MAXIMUM IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.253 INCHES MINIMUM AND 0.258 INCHES MAXIMUM IN |
| Width Between Flats | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 4 |
| Surface Treatment | SILVER OVERALL |
| Thread Class | 3A A |
| Test Data Document | +6808-P-191547 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 CORROSION RESISTING OVERALL |
| Distance From Largest Bearing Surface of Head to End of Fourth Diameter | 3.010 INCHES MINIMUM AND 3.030 INCHES MAXIMUM IN |
| Third Diameter From Head | 0.311 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN |
| Thread Series Designator | UNF |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Reference | Meaning |
|---|---|
| 2-121-026-04 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-00-142-4932 is a Bolt,externally Relieved Body, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-142-4932: Fourth Diameter From Head: 0.253 INCHES MINIMUM AND 0.258 INCHES MAXIMUM IN; Head Height: 0.180 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN; Fastener Length: 3.460 INCHES MINIMUM AND 3.480 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 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.