The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-471-0766, 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 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-471-0766 |
| Primary Part Number | 637769 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| First Step Diameter | 0.9750 INCHES MINIMUM AND 0.9850 INCHES MAXIMUM IN |
| Material Hardness Rating | 25.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM |
| End Diameter | 0.3700 INCHES MINIMUM AND 0.3800 INCHES MAXIMUM IN |
| Distance From End to First Step | 0.0780 INCHES MINIMUM AND 0.1020 INCHES MAXIMUM IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Material Document and Classification | AMS 5613 ASSN STD SINGLE MATERIAL RESPONSE |
| Counterbore Length | 0.1920 INCHES MINIMUM AND 0.1980 INCHES MAXIMUM IN |
| Second Step Diameter | 1.1800 INCHES MINIMUM AND 1.2000 INCHES MAXIMUM IN |
| Counterbore Diameter | 0.8000 INCHES MINIMUM AND 0.8200 INCHES MAXIMUM IN |
| First Step Length | 0.1880 INCHES MINIMUM AND 0.2080 INCHES MAXIMUM IN |
| Bore Diameter | 0.2510 INCHES MINIMUM AND 0.2530 INCHES MAXIMUM IN |
| Material | STEEL COMP 410 |
| 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 5340-00-471-0766 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 5340-00-471-0766 has 3 manufacturer part numbers on file: 637769 (J.t. Slocomb Corp), 637769 (Triumph Engine Control Systems Llc), 637769 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 637769: Overall Height: 0.3500 INCHES MINIMUM AND 0.3600 INCHES MAXIMUM IN; First Step Diameter: 0.9750 INCHES MINIMUM AND 0.9850 INCHES MAXIMUM IN; Material Hardness Rating: 25.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM; End Diameter: 0.3700 INCHES MINIMUM AND 0.3800 INCHES MAXIMUM IN. 13 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.