The Stud,recessed and Stepped, cataloged under National Stock Number 5307-01-326-0050, 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20 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-01-326-0050 |
| Item Name | Stud,recessed and Stepped |
| FSC / FSG | 5307 / 53 — Studs |
| Status | ACTIVE |
| Surface Treatment Document and Classification | ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.463 INCHES NOMINAL NUT THREAD IN |
| Thread Length | 0.667 INCHES NOMINAL STUD THREAD IN |
| Style Designator | RECESSED AND STEPPED |
| Material Document and Classification | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE |
| Diameter of Recessed Portion of Shank | 0.280 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.312 INCHES NUT THREAD IN |
| Nominal Thread Size | 0.375 INCHES STUD THREAD IN |
| Length of Recessed Portion of Shank | 0.080 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 2A STUD THREAD A |
| Thread Class | 2A NUT THREAD A |
| Thread Quantity Per Inch | 18 NUT THREAD |
| Thread Quantity Per Inch | 16 STUD THREAD |
| Material | STEEL COMP 303 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) STUD THREAD |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) NUT THREAD |
| Plain Shank Diameter | 0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN |
| 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 |
|---|---|
| C5088380-2 | 3/9 Design control — primary reference Us Army Combat Surveillance and Target Acquisition Laboratory |
| C5088380-2 | 5/9 Secondary reference U.S. Government activity |
NSN 5307-01-326-0050 is a Stud,recessed and Stepped, classified under FSC 5307, Studs. Status: active.
Key specifications for 5307-01-326-0050: Surface Treatment Document and Classification: ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.463 INCHES NOMINAL NUT THREAD IN; Thread Length: 0.667 INCHES NOMINAL STUD THREAD IN; Style Designator: RECESSED AND STEPPED. 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.