The Stud,stepped, cataloged under National Stock Number 5307-00-721-5990, is classified within Federal Supply Class 5307 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Allison Transmission Inc Dba Allison Transmission, Inc. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-00-721-5990 |
| Primary Part Number | ST1263 |
| Item Name | Stud,stepped |
| FSC / FSG | 5307 / 53 — No Item Name Available |
| Manufacturer | Allison Transmission Inc Dba Allison Transmission, Inc |
| Status | ACTIVE |
| Thread Class | 3A NUT THREAD A |
| Thread Series Designator | UNF NUT THREAD |
| Material | STEEL |
| Nominal Thread Size | 0.312 INCHES NUT THREAD IN |
| Shank Diameter | 0.312 INCHES NOMINAL IN |
| Nominal Thread Size | 0.375 INCHES STUD THREAD IN |
| Surface Treatment | CADMIUM OVERALL |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Quantity Per Inch | 16 STUD THREAD |
| Thread Class | 3A STUD THREAD A |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) STUD THREAD |
| Thread Quantity Per Inch | 24 NUT THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Thread Length | 0.625 INCHES MINIMUM STUD THREAD IN |
| Style Designator | STEPPED |
| Thread Length | 0.531 INCHES MINIMUM NUT THREAD IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 5307-00-721-5990 is a Stud,stepped, manufactured by Allison Transmission Inc Dba Allison Transmission, Inc, classified under FSC 5307 (No Item Name Available). Status: active.
NSN 5307-00-721-5990 has 3 cross-referenced part numbers: ST1263 (Allison Transmission Inc Dba Allison Transmission, Inc), ST1263 (General Motors Corp), ST1263 (General Motors Llc Dba General Motors Llc).
There is 1 known substitute for 5307-00-721-5990: 5961-00-177-3577. Verify interchangeability with system specifications before substitution.
Key specifications for ST1263: Thread Class: 3A NUT THREAD A; Thread Series Designator: UNF NUT THREAD; Material: STEEL; Overall Length: 1.438 INCHES NOMINAL IN. 18 total characteristics are documented in the Federal Logistics Information System.