The Stud,stepped, cataloged under National Stock Number 5307-01-104-8261, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Allison Transmission Inc Dba Allison Transmission, Inc. Government technical data includes 17 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-01-104-8261 |
| Primary Part Number | ST-1228P012 |
| Item Name | Stud,stepped |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Allison Transmission Inc Dba Allison Transmission, Inc |
| Status | ACTIVE |
| Shank Diameter | 0.203 INCHES NOMINAL IN |
| Thread Length | 0.500 INCHES NOMINAL NUT THREAD IN |
| Thread Length | 0.500 INCHES NOMINAL STUD THREAD IN |
| Hardness Rating | 32.0 ROCKWELL C MAXIMUM |
| Style Designator | STEPPED |
| Thread Pitch Diameters | +0.2899 TO 0.2914 INCHES STUD THREAD IN |
| Material Document and Classification | EMS85010,FSCM 24617 MFR REF SINGLE MATERIAL RESPONSE |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.250 INCHES NUT THREAD IN |
| Nominal Thread Size | 0.313 INCHES STUD THREAD IN |
| Thread Class | 3A NUT THREAD A |
| Thread Quantity Per Inch | 18 STUD THREAD |
| Thread Quantity Per Inch | 28 NUT THREAD |
| Material | STEEL |
| Thread Series Designator | UNF NUT THREAD |
| Thread Series Designator | UNS 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 |
|---|---|
| ST-1228P012 PRIMARY | Allison Transmission Inc Dba Allison Transmission, Inc (USA) |
NSN 5307-01-104-8261 is a Stud,stepped, manufactured by Allison Transmission Inc Dba Allison Transmission, Inc, classified under FSC 5307, Studs. Status: active.
NSN 5307-01-104-8261 has 1 manufacturer part number on file: ST-1228P012 (Allison Transmission Inc Dba Allison Transmission, Inc).
Key specifications for ST-1228P012: Shank Diameter: 0.203 INCHES NOMINAL IN; Thread Length: 0.500 INCHES NOMINAL NUT THREAD IN; Thread Length: 0.500 INCHES NOMINAL STUD THREAD IN; Hardness Rating: 32.0 ROCKWELL C MAXIMUM. 17 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.