The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-00-753-8301, 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 24 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-00-753-8301 |
| Primary Part Number | 7538301 |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Head Height | 0.625 INCHES NOMINAL IN |
| Fastener Length | 1.406 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | 4252-M,CL A FSCM 24617 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Internal Thread Length | 0.219 INCHES NOMINAL COUNTERBORE IN |
| Thread Series | UNS COUNTERBORE |
| Internal Thread Direction | RIGHT-HAND COUNTERBORE |
| Thread Length | 0.531 INCHES MINIMUM IN |
| Threads Per Inch | 24 COUNTERBORE |
| Style Designator | COUNTERBORE THREADED |
| Material Document and Classification | 1280-MO GM FSCM 24617 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.437 INCHES COUNTERBORE IN |
| Width Between Flats | 0.500 INCHES NOMINAL IN |
| Nonstandard Internal Thread Pitch Diameter | +0.4104 TO 0.4128 INCHES COUNTERBORE IN |
| Shoulder Diameter | 0.371 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Concentric Hole Diameter | 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN |
| Surface Treatment | ZINC OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL OVERALL |
| Shoulder Length | 0.750 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 |
|---|---|
| 7538301 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 2136015 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
| 2136015 | 5/9 Secondary reference General Motors Corp |
NSN 5306-00-753-8301 is a Bolt,internally Relieved Body, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-753-8301 has 1 manufacturer part number on file: 7538301 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 7538301: Head Height: 0.625 INCHES NOMINAL IN; Fastener Length: 1.406 INCHES NOMINAL IN; Surface Treatment Document and Classification: 4252-M,CL A FSCM 24617 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Internal Thread Length: 0.219 INCHES NOMINAL COUNTERBORE IN. 24 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.