The Stud,shouldered and Stepped, cataloged under National Stock Number 5307-00-348-0225, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Div Pratt & Whitney. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-00-348-0225 |
| Primary Part Number | 4028971P12 |
| Item Name | Stud,shouldered and Stepped |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Rtx Corporation Div Pratt & Whitney |
| Status | ACTIVE |
| Thread Length | 0.323 INCHES MINIMUM AND 0.405 INCHES MAXIMUM NUT THREAD IN |
| Thread Length | 0.346 INCHES MINIMUM AND 0.386 INCHES MAXIMUM STUD THREAD IN |
| Style Designator | SHOULDERED AND STEPPED |
| Thread Pitch Diameters | +0.2064 TO 0.2590 INCHES STUD THREAD IN |
| Material Document and Classification | AMS 7481 ASSN STD SINGLE MATERIAL RESPONSE |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.250 INCHES STUD THREAD IN |
| Nominal Thread Size | 0.190 INCHES NUT THREAD IN |
| Shoulder Diameter | 0.390 INCHES MINIMUM AND 0.410 INCHES MAXIMUM IN |
| Stud End Shank Diameter | 0.169 INCHES NOMINAL IN |
| Thread Class | 3A NUT THREAD A |
| Thread Quantity Per Inch | 32 NUT THREAD |
| Thread Quantity Per Inch | 20 STUD THREAD |
| Material | STEEL |
| Shoulder Length | 0.265 INCHES MINIMUM AND 0.275 INCHES MAXIMUM IN |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) 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 | F |
| Part Number | Manufacturer |
|---|---|
| 4028971P12 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 4028971P12 | Aircraft Components and Fasteners Inc (USA) |
| 4028971P12 | Thompson Aerospace, Llc Dba Thompson Aerospace Llc (USA) |
| 4028971P12 PRIMARY | Rtx Corporation Div Pratt & Whitney (USA) |
| Reference | Meaning |
|---|---|
| 4028971P12 | 5/2 Secondary reference U.S. Government activity |
| 5307PL0896274 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5307-00-348-0225 is a Stud,shouldered and Stepped, manufactured by Rtx Corporation Div Pratt & Whitney, classified under FSC 5307, Studs. Status: active.
NSN 5307-00-348-0225 has 4 manufacturer part numbers on file: 4028971P12 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 4028971P12 (Aircraft Components and Fasteners Inc), 4028971P12 (Thompson Aerospace, Llc Dba Thompson Aerospace Llc), 4028971P12 (Rtx Corporation Div Pratt & Whitney).
Key specifications for 4028971P12: Thread Length: 0.323 INCHES MINIMUM AND 0.405 INCHES MAXIMUM NUT THREAD IN; Thread Length: 0.346 INCHES MINIMUM AND 0.386 INCHES MAXIMUM STUD THREAD IN; Style Designator: SHOULDERED AND STEPPED; Thread Pitch Diameters: +0.2064 TO 0.2590 INCHES STUD THREAD IN. 18 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.