The Stud,recessed and Stepped, cataloged under National Stock Number 5307-01-142-9978, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-01-142-9978 |
| Primary Part Number | 74D750008-2031 |
| Item Name | Stud,recessed and Stepped |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Thread Length | 0.500 INCHES NOMINAL STUD THREAD IN |
| Thread Length | 0.249 INCHES NOMINAL NUT THREAD IN |
| Style Designator | RECESSED AND STEPPED |
| Material Document and Classification | MIL-S-6758 COND F MIL SPEC SINGLE MATERIAL RESPONSE |
| Diameter of Recessed Portion of Shank | 0.127 INCHES MINIMUM AND 0.137 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.250 INCHES STUD THREAD IN |
| Nominal Thread Size | 0.190 INCHES NUT THREAD IN |
| Length of Recessed Portion of Shank | 0.101 INCHES MINIMUM AND 0.116 INCHES MAXIMUM IN |
| Thread Class | 3A NUT THREAD A |
| Thread Class | 3A STUD THREAD A |
| Thread Quantity Per Inch | 32 NUT THREAD |
| Thread Quantity Per Inch | 20 STUD THREAD |
| Material | STEEL COMP 4130 |
| Thread Series Designator | UNF NUT THREAD |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) STUD THREAD |
| Plain Shank Diameter | 0.218 INCHES NOMINAL IN |
| 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 |
|---|---|
| 74D750008-2031 PRIMARY | The Boeing Company Div Defense (USA) |
| 74D750008-2031 | The Boeing Company Div Services (USA) |
| Reference | Meaning |
|---|---|
| 74D750008-2031 | 5/9 Secondary reference Pioneer Machine Products Inc. |
| 74D750008-2031 | 5/9 Secondary reference U.S. Government activity |
NSN 5307-01-142-9978 is a Stud,recessed and Stepped, manufactured by The Boeing Company Div Defense, classified under FSC 5307, Studs. Status: active.
NSN 5307-01-142-9978 has 2 manufacturer part numbers on file: 74D750008-2031 (The Boeing Company Div Defense), 74D750008-2031 (The Boeing Company Div Services).
Key specifications for 74D750008-2031: Thread Length: 0.500 INCHES NOMINAL STUD THREAD IN; Thread Length: 0.249 INCHES NOMINAL NUT THREAD IN; Style Designator: RECESSED AND STEPPED; Material Document and Classification: MIL-S-6758 COND F MIL SPEC SINGLE MATERIAL RESPONSE. 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.