The Stud,recessed and Stepped, cataloged under National Stock Number 5307-01-157-8409, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Rolls-Royce Plc Div Defense (europe). Government technical data includes 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-01-157-8409 |
| Primary Part Number | B493567 |
| Item Name | Stud,recessed and Stepped |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Rolls-Royce Plc Div Defense (europe) |
| Status | ACTIVE |
| Thread Length | 0.650 INCHES NOMINAL STUD THREAD IN |
| Thread Length | 0.880 INCHES NOMINAL NUT THREAD IN |
| Style Designator | RECESSED AND STEPPED |
| Diameter of Recessed Portion of Shank | 0.190 INCHES MINIMUM AND 0.195 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.375 INCHES STUD THREAD IN |
| Nominal Thread Size | 0.250 INCHES NUT THREAD IN |
| Length of Recessed Portion of Shank | 0.300 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN |
| Thread Class | 3A NUT THREAD A |
| Thread Class | 3A STUD THREAD A |
| Thread Quantity Per Inch | 24 STUD THREAD |
| Thread Quantity Per Inch | 28 NUT THREAD |
| Material | STEEL CORROSION RESISTING |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) STUD THREAD |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) NUT 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 |
|---|---|
| B493567 PRIMARY | Rolls-Royce Plc Div Defense (europe) (GBR) |
| Reference | Meaning |
|---|---|
| 99-971-5634 | 6/9 Informative reference only U.S. Government activity |
NSN 5307-01-157-8409 is a Stud,recessed and Stepped, manufactured by Rolls-Royce Plc Div Defense (europe), classified under FSC 5307, Studs. Status: active.
NSN 5307-01-157-8409 has 1 manufacturer part number on file: B493567 (Rolls-Royce Plc Div Defense (europe)).
Key specifications for B493567: Thread Length: 0.650 INCHES NOMINAL STUD THREAD IN; Thread Length: 0.880 INCHES NOMINAL NUT THREAD IN; Style Designator: RECESSED AND STEPPED; Overall Length: 2.180 INCHES NOMINAL IN. 16 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.