The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-01-050-2077, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-050-2077 |
| Primary Part Number | 12266025 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Head Height | 0.328 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN |
| Fastener Length | 3.576 INCHES MINIMUM AND 3.596 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,CLASS 1,TYPE 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.670 INCHES NOMINAL IN |
| Hardness Rating | 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | MIL-S-5626,COND C OR D MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-6049,COND C OR D MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-6098,COND C OR D MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-8503,COND C OR D MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.390 INCHES MINIMUM AND 0.400 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.928 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.050 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL |
| 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 | X |
| Part Number | Manufacturer |
|---|---|
| 12266025 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 666803-3 | 5/9 Secondary reference Drs Sustainment Systems, Inc. |
NSN 5306-01-050-2077 is a Bolt,externally Relieved Body, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-050-2077 has 1 manufacturer part number on file: 12266025 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12266025: Head Height: 0.328 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN; Fastener Length: 3.576 INCHES MINIMUM AND 3.596 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,CLASS 1,TYPE 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.670 INCHES NOMINAL IN. 18 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.