The Stud,locked in, cataloged under National Stock Number 5307-01-320-9966, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Div Tridair Products. Government technical data includes 19 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-01-320-9966 |
| Primary Part Number | TR28009-8 |
| Item Name | Stud,locked in |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Howmet Global Fastening Systems Inc. Div Tridair Products |
| Status | ACTIVE |
| Thread Length | 0.500 INCHES NOMINAL NUT THREAD IN |
| Thread Length | 0.212 INCHES NOMINAL STUD THREAD IN |
| Style Designator | LOCKED IN |
| Material Document and Classification | AMS 5698 ASSN STD SINGLE MATERIAL RESPONSE AND AMS 7482 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 | 0.180 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN |
| Locking Feature | KEY INSERTS |
| Thread Class | 3A NUT THREAD A |
| Thread Class | 3A STUD THREAD A |
| Distance From Shoulder Portion to Nut End | 0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN |
| Thread Quantity Per Inch | 28 STUD THREAD |
| Thread Quantity Per Inch | 32 NUT THREAD |
| Material | NICKEL ALLOY AND STEEL CORROSION RESISTING |
| Shoulder Length | 0.032 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN |
| 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 |
|---|---|
| ST2665-08 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| TR28009-8 PRIMARY | Howmet Global Fastening Systems Inc. Div Tridair Products (USA) |
| Reference | Meaning |
|---|---|
| 5307PL0896827 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| STS5178-1032-8V | 5/2 Secondary reference U.S. Government activity |
NSN 5307-01-320-9966 is a Stud,locked in, manufactured by Howmet Global Fastening Systems Inc. Div Tridair Products, classified under FSC 5307, Studs. Status: active.
NSN 5307-01-320-9966 has 2 manufacturer part numbers on file: ST2665-08 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), TR28009-8 (Howmet Global Fastening Systems Inc. Div Tridair Products).
Key specifications for TR28009-8: Thread Length: 0.500 INCHES NOMINAL NUT THREAD IN; Thread Length: 0.212 INCHES NOMINAL STUD THREAD IN; Style Designator: LOCKED IN; Material Document and Classification: AMS 5698 ASSN STD SINGLE MATERIAL RESPONSE AND AMS 7482 ASSN STD SINGLE MATERIAL RESPONSE. 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.