The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-202-3312, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Hamilton Sundstrand Corporation Dba Collins Aerospace. Government technical data includes 8 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 | 5340-01-202-3312 |
| Primary Part Number | 788079-1 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| FSC Application Data | VALVE,PRESSURE REGULATOR |
| First Step Diameter | 0.5910 INCHES MINIMUM AND 0.6010 INCHES MAXIMUM IN |
| Material Hardness Rating | 23.0 ROCKWELL C MAXIMUM |
| End Diameter | 0.3800 INCHES NOMINAL IN |
| Second End Diameter | 0.4290 INCHES MINIMUM AND 0.4390 INCHES MAXIMUM IN |
| Material Document and Classification | UNS S21800 ASSN STD SINGLE MATERIAL RESPONSE |
| Counterbore Diameter | 0.3390 INCHES MINIMUM AND 0.3490 INCHES MAXIMUM IN |
| Material | STEEL UNS S21800 |
| 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 |
|---|---|
| 788079-1 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
NSN 5340-01-202-3312 is a Seat,helical Compression Spring, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-202-3312 has 1 manufacturer part number on file: 788079-1 (Hamilton Sundstrand Corporation Dba Collins Aerospace).
Key specifications for 788079-1: FSC Application Data: VALVE,PRESSURE REGULATOR; First Step Diameter: 0.5910 INCHES MINIMUM AND 0.6010 INCHES MAXIMUM IN; Material Hardness Rating: 23.0 ROCKWELL C MAXIMUM; End Diameter: 0.3800 INCHES NOMINAL IN. 8 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.