The Insert,screw Thread, cataloged under National Stock Number 5325-00-340-4639, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-00-340-4639 |
| Primary Part Number | S1565-64179-001 |
| Item Name | Insert,screw Thread |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Width Across Flats | 0.553 INCHES MINIMUM AND 0.565 INCHES MAXIMUM IN |
| Length | 0.593 INCHES MINIMUM AND 0.598 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Flange Thickness | 0.093 INCHES NOMINAL IN |
| Insert Size | 0.375-24 UNF 3A A |
| Style Designator | FLANGE |
| Nominal Thread Size | 0.250 INCHES IN |
| Surface Treatment | ANODIZE OVERALL |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| S1565-64179-001 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| S1565-64179-1 | Edr Industries, Inc. Dba Edr Industries (USA) |
| S1565-64179-1 | Airbus Deutschland Gmbh -Werk Bremen- (DEU) |
| Reference | Meaning |
|---|---|
| S1565-64179-1 | 5/9 Secondary reference Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
NSN 5325-00-340-4639 is a Insert,screw Thread, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-340-4639 has 3 manufacturer part numbers on file: S1565-64179-001 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp), S1565-64179-1 (Edr Industries, Inc. Dba Edr Industries), S1565-64179-1 (Airbus Deutschland Gmbh -Werk Bremen-).
Key specifications for S1565-64179-001: Width Across Flats: 0.553 INCHES MINIMUM AND 0.565 INCHES MAXIMUM IN; Length: 0.593 INCHES MINIMUM AND 0.598 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Flange Thickness: 0.093 INCHES NOMINAL IN. 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.