The Stud,locked in, cataloged under National Stock Number 5307-01-559-2724, 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 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5307-01-559-2724 |
| Primary Part Number | MS51989-105-28 |
| Item Name | Stud,locked in |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Distance From Serrated Portion to Nut End | 1.750 INCHES NOMINAL IN |
| Style Designator | LOCKED IN |
| Distance From Serrated Portion to End of Stud Thread | 0.080 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.250 INCHES NUT THREAD IN |
| Distance From Serrated Portion to Stud End | 0.560 INCHES NOMINAL IN |
| Locking Feature | RING, LOCK SERRATED |
| Thread Class | 3A NUT THREAD A |
| Thread Quantity Per Inch | 28 NUT THREAD |
| Material | STEEL COMP 4130 |
| Thread Series Designator | UNF 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 |
|---|---|
| MS51989-105-28 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| MS51989-105-28 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5307-01-559-2724 is a Stud,locked in, manufactured by Sae International Dba Sae International, classified under FSC 5307, Studs. Status: active.
NSN 5307-01-559-2724 has 1 manufacturer part number on file: MS51989-105-28 (Sae International Dba Sae International).
Key specifications for MS51989-105-28: Distance From Serrated Portion to Nut End: 1.750 INCHES NOMINAL IN; Style Designator: LOCKED IN; Overall Length: 2.310 INCHES NOMINAL IN; Distance From Serrated Portion to End of Stud Thread: 0.080 INCHES NOMINAL IN. 12 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.