The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-887-0447, 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 9 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-887-0447 |
| Primary Part Number | 418852 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Countersink Angle in Deg | 45.0 |
| FSC Application Data | CONTROL ASSY,PRESSURE RATIO BLEED,ACFT ENGINE ACCESSORY,2995004356898 730565 |
| First Step Diameter | 0.7460 INCHES MINIMUM AND 0.7480 INCHES MAXIMUM IN |
| Material Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM |
| End Diameter | 0.1400 INCHES MINIMUM AND 0.1600 INCHES MAXIMUM IN |
| Design Type | SOLID |
| Surface Treatment | CADMIUM |
| Bore Diameter | 0.1200 INCHES MINIMUM AND 0.1300 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 |
NSN 5340-00-887-0447 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 5340-00-887-0447 has 2 manufacturer part numbers on file: 418852 (Rtx Corporation Div Pratt & Whitney), 418852 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 418852: Overall Height: 0.7900 INCHES MINIMUM AND 0.8100 INCHES MAXIMUM IN; Countersink Angle in Deg: 45.0; FSC Application Data: CONTROL ASSY,PRESSURE RATIO BLEED,ACFT ENGINE ACCESSORY,2995004356898 730565; First Step Diameter: 0.7460 INCHES MINIMUM AND 0.7480 INCHES MAXIMUM IN. 9 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.