The Retainer,helical Compression Spr, cataloged under National Stock Number 5340-00-789-9178, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road). Government technical data includes 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-789-9178 |
| Primary Part Number | 664279-1 |
| Item Name | Retainer,helical Compression Spr |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) |
| Status | ACTIVE |
| Flange Thickness | 0.155 INCHES NOMINAL IN |
| Body Outside Diameter | 1.120 INCHES NOMINAL IN |
| Style Designator | IRREGULAR |
| Mounting Hole Diameter | 0.220 INCHES NOMINAL IN |
| Body Inside Diameter | 0.640 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Bolt Circle Diameter | 1.750 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 664279-1 PRIMARY | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) (USA) |
| Reference | Meaning |
|---|---|
| 664279-1 | 5/9 Secondary reference Alliedsignal Inc Dba Allied-Signal Aerospace Co |
| 664279-1 | 5/9 Secondary reference U.S. Government activity |
NSN 5340-00-789-9178 is a Retainer,helical Compression Spr, manufactured by Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road), classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-789-9178 has 1 manufacturer part number on file: 664279-1 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road)).
Key specifications for 664279-1: Overall Height: 3.160 INCHES NOMINAL IN; Flange Thickness: 0.155 INCHES NOMINAL IN; Body Outside Diameter: 1.120 INCHES NOMINAL IN; Style Designator: IRREGULAR. 8 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.