The Stud,recessed and Stepped, cataloged under National Stock Number 5307-01-231-1373, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5307-01-231-1373 |
| Primary Part Number | 12325711 |
| Item Name | Stud,recessed and Stepped |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE UNDERCUTS |
| Thread Length | 0.750 INCHES MINIMUM NUT THREAD IN |
| Thread Length | 0.810 INCHES NOMINAL STUD THREAD IN |
| Material Document and Classification | ASTM A322 ASSN STD ALL MATERIAL RESPONSES OR ASTM 331 ASSN STD ALL MATERIAL RESPONSES |
| Diameter of Recessed Portion of Shank | 0.399 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.625 INCHES STUD THREAD IN |
| Nominal Thread Size | 0.500 INCHES NUT THREAD IN |
| Length of Recessed Portion of Shank | 0.231 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM AND CHROMATE UNDERCUTS |
| Thread Class | 2A STUD THREAD A |
| Thread Class | 2A NUT THREAD A |
| Thread Quantity Per Inch | 13 NUT THREAD |
| Thread Quantity Per Inch | 18 STUD THREAD |
| Material | STEEL COMP 4140 OR STEEL COMP 4340 |
| Thread Series Designator | UNF STUD THREAD |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 12325711 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 10087966 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5307-01-231-1373 is a Stud,recessed and Stepped, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5307, Studs. Status: active.
NSN 5307-01-231-1373 has 1 manufacturer part number on file: 12325711 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12325711: Surface Treatment Document and Classification: QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE UNDERCUTS; Thread Length: 0.750 INCHES MINIMUM NUT THREAD IN; Thread Length: 0.810 INCHES NOMINAL STUD THREAD IN; Material Document and Classification: ASTM A322 ASSN STD ALL MATERIAL RESPONSES OR ASTM 331 ASSN STD ALL MATERIAL RESPONSES. 18 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.