The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-223-3258, 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 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-223-3258 |
| Primary Part Number | 27228351 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Rtx Corporation Div Pratt & Whitney |
| Status | ACTIVE |
| First Step Diameter | 0.3133 INCHES MINIMUM AND 0.3137 INCHES MAXIMUM IN |
| End Diameter | 0.3133 INCHES MINIMUM AND 0.3137 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE |
| Distance From End to First Step | 0.1920 INCHES MINIMUM AND 0.1950 INCHES MAXIMUM IN |
| Design Type | SOLID |
| Material Document and Classification | AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE |
| Second Step Diameter | 0.4950 INCHES MINIMUM AND 0.4990 INCHES MAXIMUM IN |
| First Step Length | 0.0620 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE |
| Bore Diameter | 0.0920 INCHES MINIMUM AND 0.0960 INCHES MAXIMUM IN |
| Material | STEEL COMP 630 |
| 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 |
|---|---|
| 27228351 PRIMARY | Rtx Corporation Div Pratt & Whitney (USA) |
| Reference | Meaning |
|---|---|
| 27228351 | 5/9 Secondary reference U.S. Government activity |
NSN 5340-01-223-3258 is a Seat,helical Compression Spring, manufactured by Rtx Corporation Div Pratt & Whitney, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-223-3258 has 1 manufacturer part number on file: 27228351 (Rtx Corporation Div Pratt & Whitney).
Key specifications for 27228351: Overall Height: 0.4100 INCHES MINIMUM AND 0.4170 INCHES MAXIMUM IN; First Step Diameter: 0.3133 INCHES MINIMUM AND 0.3137 INCHES MAXIMUM IN; End Diameter: 0.3133 INCHES MINIMUM AND 0.3137 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE. 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.