The Stud,locked in, cataloged under National Stock Number 5307-01-159-1178, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Sae International Dba Sae International. Government technical data includes 24 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-01-159-1178 |
| Primary Part Number | MS51992E803-12 |
| Item Name | Stud,locked in |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES STUD THD |
| Surface Finish | 32.0 MICROINCHES NUT THD |
| Distance From Serrated Portion to Nut End | 0.735 INCHES MINIMUM AND 0.765 INCHES MAXIMUM IN |
| Thread Length | 0.579 INCHES MINIMUM AND 0.609 INCHES MAXIMUM NUT THREAD IN |
| Thread Length | 0.496 INCHES MINIMUM AND 0.546 INCHES MAXIMUM STUD THREAD IN |
| Hardness Rating | 35.0 ROCKWELL C MINIMUM |
| Style Designator | LOCKED IN |
| Thread Pitch Diameters | +0.3358 TO 0.3378 INCHES STUD THREAD IN |
| Material Document and Classification | AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE |
| Distance From Serrated Portion to End of Stud Thread | 0.127 INCHES MINIMUM AND 0.157 INCHES MAXIMUM IN |
| Serration Included Angle | 85.0 DEGREES MINIMUM AND 88.0 DEGREES MAXIMUM |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| 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 | 0.653 INCHES MINIMUM AND 0.673 INCHES MAXIMUM IN |
| Locking Feature | RING, LOCK SERRATED |
| Serration Quantity | 17 |
| Thread Class | 3A NUT THREAD A |
| Thread Quantity Per Inch | 24 STUD THREAD |
| Thread Quantity Per Inch | 28 NUT THREAD |
| Material | TITANIUM ALLOY UNS R56400 |
| 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 | X |
| Part Number | Manufacturer |
|---|---|
| MS51992E803-12 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| MS51992E803-12 | 5/9 Secondary reference U.S. Government activity |
| SF5902E803-12 | 5/9 Secondary reference U.S. Government activity |
| MS51992E803-12 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5307-01-159-1178 is a Stud,locked in, manufactured by Sae International Dba Sae International, classified under FSC 5307, Studs. Status: active.
NSN 5307-01-159-1178 has 1 manufacturer part number on file: MS51992E803-12 (Sae International Dba Sae International).
Key specifications for MS51992E803-12: Surface Finish: 63.0 MICROINCHES STUD THD; Surface Finish: 32.0 MICROINCHES NUT THD; Distance From Serrated Portion to Nut End: 0.735 INCHES MINIMUM AND 0.765 INCHES MAXIMUM IN; Thread Length: 0.579 INCHES MINIMUM AND 0.609 INCHES MAXIMUM NUT THREAD IN. 24 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.