The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-01-057-6683, 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 19 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-057-6683 |
| Primary Part Number | 12266666 |
| 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 | 0.200 INCHES NOMINAL IN |
| Fastener Length | 3.200 INCHES NOMINAL IN |
| Thread Length | 0.900 INCHES NOMINAL IN |
| Material Document and Classification | ASTMA582 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.190 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 2.500 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.3120 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 3.200 INCHES NOMINAL IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.150 INCHES MINIMUM AND 0.152 INCHES MAXIMUM IN |
| Width Between Flats | 0.312 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 1.500 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 3 |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 303 OVERALL |
| Third Diameter From Head | 0.190 INCHES NOMINAL IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 12266666 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 6695-555 | 5/9 Secondary reference Recon/optical, Inc. |
| 6695-555 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-057-6683 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 5306-01-057-6683 has 1 manufacturer part number on file: 12266666 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12266666: Head Height: 0.200 INCHES NOMINAL IN; Fastener Length: 3.200 INCHES NOMINAL IN; Thread Length: 0.900 INCHES NOMINAL IN; Material Document and Classification: ASTMA582 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 19 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.