The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-903-0986, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Army, United States Department of the Dba Rock Island Arsenal Jmtc. Government technical data includes 15 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 | 5340-00-903-0986 |
| Primary Part Number | 8430288 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Army, United States Department of the Dba Rock Island Arsenal Jmtc |
| Status | ACTIVE |
| First Step Diameter | 5.2400 INCHES NOMINAL IN |
| End Diameter | 3.8150 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-A-8625, TYPE 2, CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE |
| Second End Diameter | 4.7500 INCHES NOMINAL IN |
| Distance From End to First Step | 0.6000 INCHES NOMINAL IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Material Document and Classification | QQ-A-200/8, 6061, T651 FED SPEC SINGLE MATERIAL RESPONSE |
| Counterbore Length | 0.3000 INCHES NOMINAL IN |
| Counterbore Diameter | 3.7700 INCHES NOMINAL IN |
| First Step Length | 0.4400 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE |
| Spherical Seat Top Radius | 3.5040 INCHES NOMINAL IN |
| Bore Diameter | 3.5040 INCHES NOMINAL 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 |
|---|---|
| 8430288 PRIMARY | Army, United States Department of the Dba Rock Island Arsenal Jmtc (USA) |
NSN 5340-00-903-0986 is a Seat,helical Compression Spring, manufactured by Army, United States Department of the Dba Rock Island Arsenal Jmtc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-903-0986 has 1 manufacturer part number on file: 8430288 (Army, United States Department of the Dba Rock Island Arsenal Jmtc).
Key specifications for 8430288: Overall Height: 1.4000 INCHES NOMINAL IN; First Step Diameter: 5.2400 INCHES NOMINAL IN; End Diameter: 3.8150 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-A-8625, TYPE 2, CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE. 15 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.