The Stud,shouldered, cataloged under National Stock Number 5307-00-438-4125, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Ontic Engineering & Manufacturing, Inc Dba Ontic Us. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-00-438-4125 |
| Primary Part Number | 818703-1 |
| Item Name | Stud,shouldered |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Ontic Engineering & Manufacturing, Inc Dba Ontic Us |
| Status | ACTIVE |
| Style Designator | SHOULDERED |
| Nominal Thread Size | 0.138 INCHES NUT THREAD IN |
| Nominal Thread Size | 0.138 INCHES STUD THREAD IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 2A STUD THREAD A |
| Thread Class | 2A NUT THREAD A |
| Thread Quantity Per Inch | 32 STUD THREAD |
| Thread Quantity Per Inch | 32 NUT THREAD |
| Material | COPPER ALLOY |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) 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 |
|---|---|
| 818703-1 PRIMARY | Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA) |
| Reference | Meaning |
|---|---|
| 818703-1 | 5/9 Secondary reference U.S. Government activity |
NSN 5307-00-438-4125 is a Stud,shouldered, manufactured by Ontic Engineering & Manufacturing, Inc Dba Ontic Us, classified under FSC 5307, Studs. Status: active.
NSN 5307-00-438-4125 has 1 manufacturer part number on file: 818703-1 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us).
2 possible matches (shared part number, not a government interchangeability claim): 6610-00-872-2582, 5998-01-594-3389. Verify interchangeability with system specifications before substitution.
Key specifications for 818703-1: Style Designator: SHOULDERED; Nominal Thread Size: 0.138 INCHES NUT THREAD IN; Nominal Thread Size: 0.138 INCHES STUD THREAD IN; Surface Treatment: CADMIUM OVERALL. 11 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.