The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-914-5394, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 14 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. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-914-5394 |
| Primary Part Number | 491691 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| FSC Application Data | CONTROL ASSY,ENGINE ACFT P/N 544050 |
| First Step Diameter | 1.0900 INCHES NOMINAL IN |
| Material Hardness Rating | 38.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM |
| End Diameter | 0.3900 INCHES MINIMUM AND 0.4100 INCHES MAXIMUM IN |
| Second End Diameter | 0.8400 INCHES MINIMUM AND 0.8440 INCHES MAXIMUM IN |
| Distance From End to First Step | 0.0500 INCHES MINIMUM AND 0.0700 INCHES MAXIMUM IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Counterbore Length | 0.1200 INCHES NOMINAL IN |
| Counterbore Diameter | 0.6700 INCHES MINIMUM AND 0.6900 INCHES MAXIMUM IN |
| First Step Length | 0.0700 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE |
| Bore Diameter | 0.2490 INCHES MINIMUM AND 0.2510 INCHES MAXIMUM IN |
| Material | STEEL |
| 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 |
|---|---|
| 491691 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
NSN 5340-00-914-5394 is a Seat,helical Compression Spring, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-914-5394 has 1 manufacturer part number on file: 491691 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 491691: Overall Height: 0.2600 INCHES NOMINAL IN; FSC Application Data: CONTROL ASSY,ENGINE ACFT P/N 544050; First Step Diameter: 1.0900 INCHES NOMINAL IN; Material Hardness Rating: 38.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM. 14 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.