The Stud,locked in, cataloged under National Stock Number 5307-01-123-6504, 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 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-01-123-6504 |
| Primary Part Number | SFJ121-17SA20A |
| 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 | 1.235 INCHES MINIMUM AND 1.265 INCHES MAXIMUM IN |
| Thread Length | 0.505 INCHES MINIMUM AND 0.535 INCHES MAXIMUM STUD THREAD IN |
| Thread Length | 0.605 INCHES MINIMUM AND 0.635 INCHES MAXIMUM NUT THREAD IN |
| Style Designator | LOCKED IN |
| Distance From Serrated Portion to End of Stud Thread | 0.512 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Distance From Serrated Portion to Stud End | 1.047 INCHES MINIMUM AND 1.077 INCHES MAXIMUM IN |
| Locking Feature | RING, LOCK SERRATED |
| Serration Quantity | 24 |
| Thread Class | 3A NUT THREAD A |
| 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 |
|---|---|
| SFJ121-17SA20A | Howmet Global Fastening Systems Inc. Div Tridair Products (USA) |
| Reference | Meaning |
|---|---|
| SFJ121-17SA20A | 3/2 Design control — primary reference U.S. Government activity |
NSN 5307-01-123-6504 is a Stud,locked in, manufactured by Howmet Global Fastening Systems Inc. Div Tridair Products, classified under FSC 5307, Studs. Status: active.
NSN 5307-01-123-6504 has 1 manufacturer part number on file: SFJ121-17SA20A (Howmet Global Fastening Systems Inc. Div Tridair Products).
Key specifications for SFJ121-17SA20A: Distance From Serrated Portion to Nut End: 1.235 INCHES MINIMUM AND 1.265 INCHES MAXIMUM IN; Thread Length: 0.505 INCHES MINIMUM AND 0.535 INCHES MAXIMUM STUD THREAD IN; Thread Length: 0.605 INCHES MINIMUM AND 0.635 INCHES MAXIMUM NUT THREAD IN; Style Designator: LOCKED IN. 9 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.