The Stud,welding, cataloged under National Stock Number 5307-01-221-9979, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5307-01-221-9979 |
| Item Name | Stud,welding |
| FSC / FSG | 5307 / 53 — Studs |
| Status | ACTIVE |
| Thread Length | 0.657 INCHES NOMINAL AND 0.781 INCHES MAXIMUM NUT THREAD IN |
| Style Designator | WELDING |
| Unthreaded End Diameter | 0.210 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN |
| Length Excluding Fluxed Welding Tip | 1.094 INCHES MINIMUM AND 1.156 INCHES MAXIMUM IN |
| Features Provided | HEAT SHIELD |
| Unthreaded End Length | 0.375 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.250 INCHES NUT THREAD IN |
| Nondefinitive Spec/std Data | 5 TYPE OR 1 CLASS |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Quantity Per Inch | 20 NUT THREAD |
| Material | STEEL CORROSION RESISTING |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) 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 |
| Reference | Meaning |
|---|---|
| M24149/3-4 | 4/1 Identification reference U.S. Government activity |
| MIL-S-24149/3 TY 5 CL 1 | 2/2 Government specification standardization U.S. Government activity |
| M24149/3D-4 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 5307-01-221-9979 is a Stud,welding, classified under FSC 5307, Studs. Status: active.
Key specifications for 5307-01-221-9979: Thread Length: 0.657 INCHES NOMINAL AND 0.781 INCHES MAXIMUM NUT THREAD IN; Style Designator: WELDING; Unthreaded End Diameter: 0.210 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN; Length Excluding Fluxed Welding Tip: 1.094 INCHES MINIMUM AND 1.156 INCHES MAXIMUM IN. 13 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.