The Stud,recessed and Stepped, cataloged under National Stock Number 5307-01-252-4603, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corp. Government technical data includes 15 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-01-252-4603 |
| Primary Part Number | 863C1011170-028 |
| Item Name | Stud,recessed and Stepped |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Lockheed Martin Corp |
| Status | ACTIVE |
| Thread Length | 1.000 INCHES NOMINAL STUD THREAD IN |
| Thread Length | 2.750 INCHES NOMINAL NUT THREAD IN |
| Style Designator | RECESSED AND STEPPED |
| Diameter of Recessed Portion of Shank | 0.750 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.750 INCHES NUT THREAD IN |
| Nominal Thread Size | 2.000 INCHES STUD THREAD IN |
| Length of Recessed Portion of Shank | 1.410 INCHES NOMINAL IN |
| Thread Class | 2A NUT THREAD A |
| Thread Quantity Per Inch | 10 NUT THREAD |
| Thread Quantity Per Inch | 11.5 STUD THREAD |
| Material | STEEL |
| Distance Across Flats | 0.600 INCHES NOMINAL IN |
| 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 |
|---|---|
| 863C1011170-028 PRIMARY | Lockheed Martin Corp (USA) |
NSN 5307-01-252-4603 is a Stud,recessed and Stepped, manufactured by Lockheed Martin Corp, classified under FSC 5307, Studs. Status: active.
NSN 5307-01-252-4603 has 1 manufacturer part number on file: 863C1011170-028 (Lockheed Martin Corp).
Key specifications for 863C1011170-028: Thread Length: 1.000 INCHES NOMINAL STUD THREAD IN; Thread Length: 2.750 INCHES NOMINAL NUT THREAD IN; Style Designator: RECESSED AND STEPPED; Overall Length: 6.160 INCHES NOMINAL IN. 15 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.