The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-134-4754, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Div Pratt & Whitney. Government technical data includes 11 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 | 5340-01-134-4754 |
| Primary Part Number | 77-0544 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Rtx Corporation Div Pratt & Whitney |
| Status | ACTIVE |
| First Step Diameter | 0.5200 INCHES NOMINAL IN |
| End Diameter | 0.3925 INCHES NOMINAL IN |
| Countersink Diameter | 0.2535 INCHES NOMINAL IN |
| Distance From End to First Step | 0.0700 INCHES NOMINAL IN |
| Design Type | SOLID |
| Material Document and Classification | QQ-A-250/5, ALLOY 2024, T4 FED SPEC SINGLE MATERIAL RESPONSE |
| Counterbore Length | 0.0300 INCHES NOMINAL IN |
| Counterbore Diameter | 0.3925 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE |
| Bore Diameter | 0.2535 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 2024 |
| 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 5340-01-134-4754 is a Seat,helical Compression Spring, manufactured by Rtx Corporation Div Pratt & Whitney, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-134-4754 has 2 manufacturer part numbers on file: 77-0544 (Rtx Corporation Div Pratt & Whitney), 77-0544 (Department of Defense Project Manager-Mobile Electric Power).
Key specifications for 77-0544: Overall Height: 0.1250 INCHES NOMINAL IN; First Step Diameter: 0.5200 INCHES NOMINAL IN; End Diameter: 0.3925 INCHES NOMINAL IN; Countersink Diameter: 0.2535 INCHES NOMINAL IN. 11 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.