The Stud,stepped, cataloged under National Stock Number 5307-01-024-4924, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Rolls-Royce Corporation. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-01-024-4924 |
| Primary Part Number | 37931P012 |
| Item Name | Stud,stepped |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Rolls-Royce Corporation |
| Status | ACTIVE |
| Shank Diameter | 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Surface Finish | 63.0 MICROINCHES OVERALL |
| Surface Treatment Document and Classification | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE NUT THD |
| Surface Treatment Document and Classification | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE SHANK |
| Cotter Pin Hole Diameter | 0.070 INCHES NOMINAL FIRST HOLE IN |
| Thread Length | 0.500 INCHES NOMINAL NUT THREAD IN |
| Thread Length | 0.500 INCHES NOMINAL STUD THREAD IN |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| Style Designator | STEPPED |
| Thread Pitch Diameters | +0.2899 TO 0.2914 INCHES STUD THREAD 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 |
| Surface Treatment | CADMIUM SHANK |
| Surface Treatment | CADMIUM NUT THD |
| Thread Class | 3A NUT THREAD A |
| Thread Quantity Per Inch | 18 STUD THREAD |
| Thread Quantity Per Inch | 28 NUT THREAD |
| Thread Series Designator | UNF NUT THREAD |
| Thread Series Designator | UNS STUD THREAD |
| Distance From Cotter Pin Hole Centerline to Nut End | 0.141 INCHES NOMINAL FIRST HOLE IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5307-01-024-4924 is a Stud,stepped, manufactured by Rolls-Royce Corporation, classified under FSC 5307, Studs. Status: active.
NSN 5307-01-024-4924 has 2 manufacturer part numbers on file: 37931P012 (Allison Transmission Inc Dba Allison Transmission, Inc), 37931P012 (Rolls-Royce Corporation).
Key specifications for 37931P012: Shank Diameter: 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN; Surface Finish: 63.0 MICROINCHES OVERALL; Surface Treatment Document and Classification: AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE NUT THD; Surface Treatment Document and Classification: AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE SHANK. 22 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.