The Stud,locked in, cataloged under National Stock Number 5307-01-497-4181, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Rolls Royce Corp. Government technical data includes 19 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 | 5307-01-497-4181 |
| Primary Part Number | MS51833A201-8 |
| Item Name | Stud,locked in |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Rolls Royce Corp |
| Status | ACTIVE |
| Surface Treatment Document and Classification | ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.380 INCHES MINIMUM AND 0.440 INCHES MAXIMUM NUT THREAD IN |
| Thread Length | 0.297 INCHES MINIMUM AND 0.327 INCHES MAXIMUM STUD THREAD IN |
| Criticality Code Justification | AGAV |
| Style Designator | LOCKED IN |
| Material Document and Classification | AMS 5734 ASSN STD SINGLE MATERIAL RESPONSE |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Distance From End of Stud End Threads to Nut End | 0.500 INCHES NOMINAL IN |
| Nominal Thread Size | 0.312 INCHES STUD THREAD IN |
| Nominal Thread Size | 0.190 INCHES NUT THREAD IN |
| Locking Feature | KEY INSERTS |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 2A STUD THREAD A |
| Thread Class | 3A NUT THREAD A |
| Thread Quantity Per Inch | 32 NUT THREAD |
| Thread Quantity Per Inch | 18 STUD THREAD |
| Material | IRON ALLOY 660 |
| 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 | Y |
| Part Number | Manufacturer |
|---|---|
| MS51833A201-8 PRIMARY | Rolls Royce Corp (USA) |
NSN 5307-01-497-4181 is a Stud,locked in, manufactured by Rolls Royce Corp, classified under FSC 5307, Studs. Status: active.
NSN 5307-01-497-4181 has 1 manufacturer part number on file: MS51833A201-8 (Rolls Royce Corp).
Key specifications for MS51833A201-8: Surface Treatment Document and Classification: ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.380 INCHES MINIMUM AND 0.440 INCHES MAXIMUM NUT THREAD IN; Thread Length: 0.297 INCHES MINIMUM AND 0.327 INCHES MAXIMUM STUD THREAD IN; Criticality Code Justification: AGAV. 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.