The Stud,recessed and Stepped, cataloged under National Stock Number 5307-00-479-4540, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is General Motors Llc Dba General Motors Llc. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5307-00-479-4540 |
| Primary Part Number | ST1229P003 |
| Item Name | Stud,recessed and Stepped |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | General Motors Llc Dba General Motors Llc |
| Status | ACTIVE |
| Thread Length | 0.500 INCHES MAXIMUM NUT THREAD IN |
| Thread Length | 0.500 INCHES MAXIMUM STUD THREAD IN |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| Style Designator | RECESSED AND STEPPED |
| Thread Pitch Diameters | +0.2819 TO 0.2834 INCHES STUD THREAD IN |
| Material Document and Classification | AMS 6320 ASSN STD SINGLE MATERIAL RESPONSE |
| Diameter of Recessed Portion of Shank | 0.203 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.250 INCHES NUT THREAD IN |
| Nominal Thread Size | 0.312 INCHES STUD THREAD IN |
| Length of Recessed Portion of Shank | 0.469 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A NUT THREAD A |
| Thread Quantity Per Inch | 18 STUD THREAD |
| Thread Quantity Per Inch | 28 NUT THREAD |
| Material | STEEL COMP 8735 |
| Thread Series Designator | UNF NUT THREAD |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) STUD THREAD |
| 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 |
|---|---|
| ST1229P3 | Allison Transmission Inc Dba Allison Transmission, Inc (USA) |
| ST1229P003 | Allison Transmission Inc Dba Allison Transmission, Inc (USA) |
| ST1229P3 | General Motors Llc Dba General Motors Llc (USA) |
| ST1229P003 PRIMARY | General Motors Llc Dba General Motors Llc (USA) |
| Reference | Meaning |
|---|---|
| ST1229P3 | 5/9 Secondary reference General Motors Corp |
| ST1229P003 | 3/9 Design control — primary reference General Motors Corp |
NSN 5307-00-479-4540 is a Stud,recessed and Stepped, manufactured by General Motors Llc Dba General Motors Llc, classified under FSC 5307, Studs. Status: active.
NSN 5307-00-479-4540 has 4 manufacturer part numbers on file: ST1229P3 (Allison Transmission Inc Dba Allison Transmission, Inc), ST1229P003 (Allison Transmission Inc Dba Allison Transmission, Inc), ST1229P3 (General Motors Llc Dba General Motors Llc), ST1229P003 (General Motors Llc Dba General Motors Llc).
Key specifications for ST1229P003: Thread Length: 0.500 INCHES MAXIMUM NUT THREAD IN; Thread Length: 0.500 INCHES MAXIMUM STUD THREAD IN; Hardness Rating: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM; Style Designator: RECESSED AND STEPPED. 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.