The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-01-333-6389, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is D. M. T Inc. Government technical data includes 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-333-6389 |
| Primary Part Number | 66673-1281-001 |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | D. M. T Inc |
| Status | ACTIVE |
| Head Height | 0.070 INCHES NOMINAL IN |
| Fastener Length | 0.735 INCHES NOMINAL IN |
| Thread Length | 0.580 INCHES NOMINAL IN |
| Style Designator | CONCENTRIC HOLE UNTHREADED |
| Material Document and Classification | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | DISHED HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.302 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Concentric Hole Diameter | 0.171 INCHES MINIMUM AND 0.177 INCHES MAXIMUM IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 40 |
| Material | STEEL COMP 303 OVERALL |
| Thread Series Designator | UNS |
| 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 |
|---|---|
| 66673-1281-001 PRIMARY | D. M. T Inc (USA) |
| Reference | Meaning |
|---|---|
| 717511281-001 | 7/2 Vendor item drawing reference Lockheed Martin Corporation |
| 66673-1281 | 5/9 Secondary reference D. M. T Inc |
NSN 5306-01-333-6389 is a Bolt,internally Relieved Body, manufactured by D. M. T Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-333-6389 has 1 manufacturer part number on file: 66673-1281-001 (D. M. T Inc).
Key specifications for 66673-1281-001: Head Height: 0.070 INCHES NOMINAL IN; Fastener Length: 0.735 INCHES NOMINAL IN; Thread Length: 0.580 INCHES NOMINAL IN; Style Designator: CONCENTRIC HOLE UNTHREADED. 14 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.