The Stud,welding, cataloged under National Stock Number 5307-01-686-8409, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-01-686-8409 |
| Item Name | Stud,welding |
| FSC / FSG | 5307 / 53 — Studs |
| Status | ACTIVE |
| Thread Length | 0.750 INCHES NOMINAL STUD THREAD IN |
| Style Designator | WELDING |
| Unthreaded End Diameter | 0.21 INCHES MINIMUM AND 0.22 INCHES MAXIMUM IN |
| Length Excluding Fluxed Welding Tip | 2.969 INCHES MINIMUM AND 3.031 INCHES MAXIMUM IN |
| Unthreaded End Length | 2.157 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Nominal Thread Size | 0.2500 INCHES STUD THREAD IN |
| Specification/standard Data | 81349-MIL-S-24149/1D GOVERNMENT SPECIFICATION |
| Shoulder Diameter | 0.495 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN |
| Thread Class | 2A STUD THREAD A |
| Thread Quantity Per Inch | 20 STUD THREAD |
| Material | STEEL |
| Shoulder Length | 0.093 INCHES NOMINAL IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) 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 |
|---|---|
| M24149/1-513 | 2/2 Government specification standardization U.S. Government activity |
| MIL-S-24149/1D | 5/9 Secondary reference U.S. Government activity |
| MIL-S-24149/1 | 4/1 Identification reference U.S. Government activity |
NSN 5307-01-686-8409 is a Stud,welding, classified under FSC 5307, Studs. Status: active.
7 possible matches (shared part number, not a government interchangeability claim): 5307-01-686-8456, 5307-01-686-8477, 5307-01-686-8486. Verify interchangeability with system specifications before substitution.
Key specifications for 5307-01-686-8409: Thread Length: 0.750 INCHES NOMINAL STUD THREAD IN; Style Designator: WELDING; Unthreaded End Diameter: 0.21 INCHES MINIMUM AND 0.22 INCHES MAXIMUM IN; Length Excluding Fluxed Welding Tip: 2.969 INCHES MINIMUM AND 3.031 INCHES MAXIMUM IN. 14 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.