The Stud,locked in, cataloged under National Stock Number 5307-01-309-8824, 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 18 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-01-309-8824 |
| Primary Part Number | TR28009-18 |
| Item Name | Stud,locked in |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Howmet Global Fastening Systems Inc. Div Tridair Products |
| Status | ACTIVE |
| Thread Length | 1.110 INCHES MINIMUM AND 1.140 INCHES MAXIMUM NUT THREAD IN |
| Style Designator | LOCKED IN |
| Material Document and Classification | AMS 5698 ASSN STD SINGLE MATERIAL RESPONSE AND AMS 5737 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 | 1.110 INCHES MINIMUM AND 1.140 INCHES MAXIMUM IN |
| Thread Quantity Per Inch | 28 STUD THREAD |
| Thread Quantity Per Inch | 32 NUT THREAD |
| Material | NICKEL ALLOY AND STEEL |
| 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 |
|---|---|
| TR28009-18 PRIMARY | Howmet Global Fastening Systems Inc. Div Tridair Products (USA) |
| ST2665-18 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 5307PL1870521 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 5307PL0896737 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| ST2665 | D/9 Drawing number reference only Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
NSN 5307-01-309-8824 is a Stud,locked in, manufactured by Howmet Global Fastening Systems Inc. Div Tridair Products, classified under FSC 5307, Studs. Status: active.
NSN 5307-01-309-8824 has 2 manufacturer part numbers on file: TR28009-18 (Howmet Global Fastening Systems Inc. Div Tridair Products), ST2665-18 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
1 possible match (shared part number, not a government interchangeability claim): 5307-01-309-8825. Verify interchangeability with system specifications before substitution.
Key specifications for TR28009-18: Thread Length: 1.110 INCHES MINIMUM AND 1.140 INCHES MAXIMUM NUT THREAD IN; Style Designator: LOCKED IN; Material Document and Classification: AMS 5698 ASSN STD SINGLE MATERIAL RESPONSE AND AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE; Overall Length: 1.375 INCHES NOMINAL 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.