The Stud,locked in, cataloged under National Stock Number 5307-00-025-8306, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-00-025-8306 |
| Item Name | Stud,locked in |
| FSC / FSG | 5307 / 53 — Studs |
| Status | ACTIVE |
| Distance From Serrated Portion to Nut End | 1.000 INCHES NOMINAL IN |
| Thread Length | 0.630 INCHES NOMINAL STUD THREAD IN |
| Thread Length | 0.812 INCHES NOMINAL NUT THREAD IN |
| Style Designator | LOCKED IN |
| Thread Pitch Diameters | +0.5097 TO 0.5122 INCHES STUD THREAD IN |
| Material Document and Classification | MIL-S-6758,COND C4 MIL SPEC SINGLE MATERIAL RESPONSE |
| Distance From Serrated Portion to End of Stud Thread | 0.245 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.500 INCHES NUT THREAD IN |
| Nominal Thread Size | 0.562 INCHES STUD THREAD IN |
| Distance From Serrated Portion to Stud End | 0.875 INCHES NOMINAL IN |
| Locking Feature | SELF-CLINCHING HEAD |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A NUT THREAD A |
| Thread Quantity Per Inch | 12 STUD THREAD |
| Thread Quantity Per Inch | 20 NUT THREAD |
| Material | STEEL COMP 4130 |
| Thread Series Designator | UNF 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 |
| Reference | Meaning |
|---|---|
| SF141-14SA16A | 3/2 Design control — primary reference U.S. Government activity |
| BACS21S12-1 | 5/2 Secondary reference U.S. Government activity |
| BACS21S14-16A | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 5307-00-025-8306 is a Stud,locked in, classified under FSC 5307, Studs. Status: active.
Key specifications for 5307-00-025-8306: Distance From Serrated Portion to Nut End: 1.000 INCHES NOMINAL IN; Thread Length: 0.630 INCHES NOMINAL STUD THREAD IN; Thread Length: 0.812 INCHES NOMINAL NUT THREAD IN; Style Designator: LOCKED IN. 20 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.