The Stud,shouldered and Stepped, cataloged under National Stock Number 5307-00-810-9568, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 21 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. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-00-810-9568 |
| Primary Part Number | 405551 |
| Item Name | Stud,shouldered and Stepped |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Nut End Shank Diameter | 0.592 INCHES MINIMUM AND 0.593 INCHES MAXIMUM IN |
| Thread Length | 0.510 INCHES NOMINAL STUD THREAD IN |
| Thread Length | 0.805 INCHES NOMINAL NUT THREAD IN |
| Criticality Code Justification | FEAT |
| Style Designator | SHOULDERED AND STEPPED |
| Material Document and Classification | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.375 INCHES NUT THREAD IN |
| Nominal Thread Size | 0.438 INCHES STUD THREAD IN |
| Surface Treatment | CADMIUM OVERALL |
| Nut End Shank Length | 0.393 INCHES NOMINAL IN |
| Thread Class | 3A NUT THREAD A |
| Thread Class | 3A STUD THREAD A |
| Thread Quantity Per Inch | 24 NUT THREAD |
| Thread Quantity Per Inch | 20 STUD THREAD |
| Material | STEEL COMP 8740 |
| Distance Across Flats | 0.928 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN |
| Shoulder Length | 0.198 INCHES NOMINAL IN |
| Thread Series Designator | UNF STUD THREAD |
| Thread Series Designator | UNF NUT THREAD |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
NSN 5307-00-810-9568 is a Stud,shouldered and Stepped, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5307, Studs. Status: active.
NSN 5307-00-810-9568 has 2 manufacturer part numbers on file: 405551 (Union Machine Co of Lynn, Inc), 405551 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
2 possible matches (shared part number, not a government interchangeability claim): 2915-00-983-1060, 6220-01-613-1580. Verify interchangeability with system specifications before substitution.
Key specifications for 405551: Nut End Shank Diameter: 0.592 INCHES MINIMUM AND 0.593 INCHES MAXIMUM IN; Thread Length: 0.510 INCHES NOMINAL STUD THREAD IN; Thread Length: 0.805 INCHES NOMINAL NUT THREAD IN; Criticality Code Justification: FEAT. 21 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.