The Stud,positive Lock, cataloged under National Stock Number 5325-01-641-1812, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government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 | 5325-01-641-1812 |
| Primary Part Number | 167-8278267 ITEM 12 |
| Item Name | Stud,positive Lock |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Undercut Length | 0.110 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN |
| Positive Lock Stud Shank Style | STUD SHANK |
| Major Diameter Length | 0.280 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN |
| End Overall Length | 0.420 INCHES NOMINAL IN |
| Shank Minor Diameter | 0.501 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Stud Shank Overall Height | 1.080 INCHES NOMINAL IN |
| Thread Size and Series/type Designator | 0.625-18UNF-2A UNF A |
| Positive Lock Stud Head Style | STUD HEAD |
| Head Diameter | 0.625 INCHES NOMINAL IN |
| Shank Major Diameter | 0.732 INCHES MINIMUM AND 0.734 INCHES MAXIMUM 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 |
|---|---|
| 167-8278268 ITEM 28 | Naval Sea Systems Command (USA) |
| 167-8278275 ITEM 26 | Naval Sea Systems Command (USA) |
| 167-8278267 ITEM 12 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 167-8278275 | D/9 Drawing number reference only Naval Sea Systems Command |
| 167-8278267 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 5325-01-641-1812 is a Stud,positive Lock, manufactured by Naval Sea Systems Command, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-641-1812 has 3 manufacturer part numbers on file: 167-8278268 ITEM 28 (Naval Sea Systems Command), 167-8278275 ITEM 26 (Naval Sea Systems Command), 167-8278267 ITEM 12 (Naval Sea Systems Command).
6 possible matches (shared part number, not a government interchangeability claim): 5325-01-641-4973, 5340-01-641-4976, 5325-01-641-7422. Verify interchangeability with system specifications before substitution.
Key specifications for 167-8278267 ITEM 12: Undercut Length: 0.110 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN; Positive Lock Stud Shank Style: STUD SHANK; Major Diameter Length: 0.280 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN; End Overall Length: 0.420 INCHES NOMINAL IN. 10 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.