The Stud,locked in, cataloged under National Stock Number 5307-01-486-0348, 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5307-01-486-0348 |
| Primary Part Number | KNS10278-4-28 |
| Item Name | Stud,locked in |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Howmet Global Fastening Systems Inc. Div Tridair Products |
| Status | ACTIVE |
| Distance From Serrated Portion to Nut End | 1.720 INCHES MINIMUM AND 1.780 INCHES MAXIMUM IN |
| Thread Length | 0.375 INCHES NOMINAL STUD THREAD IN |
| Thread Length | 0.372 INCHES NOMINAL NUT THREAD IN |
| Style Designator | LOCKED IN |
| Material Document and Classification | AMS5662 ASSN STD SINGLE MATERIAL RESPONSE |
| Distance From Serrated Portion to End of Stud Thread | 0.175 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED |
| Nominal Thread Size | 0.375 INCHES STUD THREAD IN |
| Nominal Thread Size | 0.250 INCHES NUT THREAD IN |
| Distance From Serrated Portion to Stud End | 0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN |
| Locking Feature | KEY INSERTS |
| Thread Class | 2A STUD THREAD A |
| Thread Class | 3A NUT THREAD A |
| Thread Quantity Per Inch | 16 STUD THREAD |
| Thread Quantity Per Inch | 28 NUT THREAD |
| Material | NICKEL ALLOY 718 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) STUD THREAD |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) NUT THREAD |
| Furnished Items and Quantity | 2 SELF BROACHING LOCKING KEYS |
| 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 |
|---|---|
| KNS10278-4-28 | Howmet Global Fastening Systems Inc. Div Tridair Products (USA) |
| ST5035-28 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| KNS10278-4-28 | 5/9 Secondary reference Howmet Global Fastening Systems Inc. Div Microdot Products |
| ST5036-28 | 5/9 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| TR28036-28 | 3/2 Design control — primary reference U.S. Government activity |
| ST5034-28 | 5/1 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
NSN 5307-01-486-0348 is a Stud,locked in, manufactured by Howmet Global Fastening Systems Inc. Div Tridair Products, classified under FSC 5307, Studs. Status: active.
NSN 5307-01-486-0348 has 2 manufacturer part numbers on file: KNS10278-4-28 (Howmet Global Fastening Systems Inc. Div Tridair Products), ST5035-28 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
1 possible match (shared part number, not a government interchangeability claim): 5307-01-486-1339. Verify interchangeability with system specifications before substitution.
Key specifications for KNS10278-4-28: Distance From Serrated Portion to Nut End: 1.720 INCHES MINIMUM AND 1.780 INCHES MAXIMUM IN; Thread Length: 0.375 INCHES NOMINAL STUD THREAD IN; Thread Length: 0.372 INCHES NOMINAL NUT THREAD IN; Style Designator: LOCKED IN. 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.