The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-075-2012, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Meggitt North Hollywood Inc. Government technical data includes 10 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-075-2012 |
| Primary Part Number | 221617-1 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Meggitt North Hollywood Inc |
| Status | ACTIVE |
| Countersink Angle in Deg | 86.0 |
| First Step Diameter | 0.4800 INCHES MINIMUM AND 0.4900 INCHES MAXIMUM IN |
| End Diameter | 0.3350 INCHES MINIMUM AND 0.3450 INCHES MAXIMUM IN |
| Countersink Diameter | 0.2600 INCHES MINIMUM AND 0.2900 INCHES MAXIMUM IN |
| Distance From End to First Step | 0.0650 INCHES MINIMUM AND 0.0950 INCHES MAXIMUM IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Surface Treatment | ANODIZE |
| Bore Diameter | 0.1180 INCHES MINIMUM AND 0.1250 INCHES MAXIMUM IN |
| Material | ALUMINUM ALLOY |
| 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 |
|---|---|
| 221617-1 PRIMARY | Meggitt North Hollywood Inc (USA) |
NSN 5340-01-075-2012 is a Seat,helical Compression Spring, manufactured by Meggitt North Hollywood Inc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-075-2012 has 1 manufacturer part number on file: 221617-1 (Meggitt North Hollywood Inc).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-373-0343. Verify interchangeability with system specifications before substitution.
Key specifications for 221617-1: Overall Height: 0.1300 INCHES MINIMUM AND 0.1500 INCHES MAXIMUM IN; Countersink Angle in Deg: 86.0; First Step Diameter: 0.4800 INCHES MINIMUM AND 0.4900 INCHES MAXIMUM IN; End Diameter: 0.3350 INCHES MINIMUM AND 0.3450 INCHES MAXIMUM IN. 10 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.