The Receptacle,turnlock Fastener, cataloged under National Stock Number 5325-01-184-0371, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5325-01-184-0371 |
| Primary Part Number | HS4495-1 |
| Item Name | Receptacle,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Receptacle Overall Length | 0.928 INCHES MINIMUM AND 0.948 INCHES MAXIMUM IN |
| Receptacle Thread Size and Series/type Designator | 0.164-32 UNIFIED NATIONAL COARSE (UNC) |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Center to Center Distance Between Mounting Holes | 0.682 INCHES MINIMUM AND 0.692 INCHES MAXIMUM IN |
| Mounting Style | PLAIN W/MOUNTING HOLE |
| Material Document and Classification | AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE STUD |
| Material Document and Classification | ASTM A582 ASSN STD ALL MATERIAL RESPONSES HOUSING |
| Turnlock Receptacle Style | RECEPTACLE |
| Receptacle Width | 0.425 INCHES MINIMUM AND 0.455 INCHES MAXIMUM IN |
| Turnlock Mounting Hole Diameter | 0.095 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Receptacle Height | 0.545 INCHES MINIMUM AND 0.575 INCHES MAXIMUM IN |
| Material | IRON ALLOY 660 STUD |
| Material | STEEL COMP 303 OR STEEL COMP 303SE HOUSING |
| 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 |
|---|---|
| GR520W1 | Northrop Grumman Systems Corporation (USA) |
| HS4495-1 PRIMARY | The Boeing Company (USA) |
| CA1810 PRIMARY | Howmet Global Fastening Systems Inc. Div Tridair Products (USA) |
| Reference | Meaning |
|---|---|
| HS4495-1 | 5/9 Secondary reference Mcdonnell Douglas Helicopter Co Inc |
NSN 5325-01-184-0371 is a Receptacle,turnlock Fastener, manufactured by The Boeing Company, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-184-0371 has 3 manufacturer part numbers on file: GR520W1 (Northrop Grumman Systems Corporation), HS4495-1 (The Boeing Company), CA1810 (Howmet Global Fastening Systems Inc. Div Tridair Products).
2 possible matches (shared part number, not a government interchangeability claim): 5325-01-630-6026, 5325-01-669-4418. Verify interchangeability with system specifications before substitution.
Key specifications for HS4495-1: Receptacle Overall Length: 0.928 INCHES MINIMUM AND 0.948 INCHES MAXIMUM IN; Receptacle Thread Size and Series/type Designator: 0.164-32 UNIFIED NATIONAL COARSE (UNC); Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Center to Center Distance Between Mounting Holes: 0.682 INCHES MINIMUM AND 0.692 INCHES MAXIMUM IN. 14 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.