The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-147-4321, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-147-4321 |
| Primary Part Number | 630AS133-1 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| First Step Diameter | 1.1250 INCHES NOMINAL IN |
| End Diameter | 0.8125 INCHES NOMINAL IN |
| Second End Diameter | 0.8730 INCHES MINIMUM AND 0.8750 INCHES MAXIMUM IN |
| Distance From End to First Step | 0.4375 INCHES NOMINAL IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Material Document and Classification | QQ-A-225/8, ALLOY 6061, T6 FED SPEC SINGLE MATERIAL RESPONSE |
| First Step Length | 0.0312 INCHES NOMINAL IN |
| Spherical Seat Top Radius | 0.0312 INCHES MAXIMUM IN |
| Bore Diameter | 0.6250 INCHES MINIMUM AND 0.6280 INCHES MAXIMUM IN |
| Material | ALUMINUM ALLOY 6061 |
| 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 |
|---|---|
| 630AS133-1 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| E159-324 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5340-01-147-4321 is a Seat,helical Compression Spring, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-147-4321 has 1 manufacturer part number on file: 630AS133-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for 630AS133-1: Overall Height: 0.7500 INCHES NOMINAL IN; First Step Diameter: 1.1250 INCHES NOMINAL IN; End Diameter: 0.8125 INCHES NOMINAL IN; Second End Diameter: 0.8730 INCHES MINIMUM AND 0.8750 INCHES MAXIMUM 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.