The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-042-9555, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Cummins Inc.. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers 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 | 5340-01-042-9555 |
| Primary Part Number | 205094 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Cummins Inc. |
| Status | ACTIVE |
| Countersink Angle in Deg | 45.0 |
| First Step Diameter | 1.3120 INCHES NOMINAL IN |
| End Diameter | 0.9060 INCHES NOMINAL IN |
| Seat Angle in Deg | 15.0 |
| Countersink Diameter | 1.1250 INCHES NOMINAL IN |
| Third Step Diameter | 1.7810 INCHES NOMINAL IN |
| Second End Diameter | 1.4380 INCHES NOMINAL IN |
| Distance From End to First Step | 0.2500 INCHES NOMINAL IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Features Provided | CASEHARDENED |
| Second Step Diameter | 1.7810 INCHES NOMINAL IN |
| Bore Taper in Deg | 7.0 |
| First Step Length | 0.1880 INCHES NOMINAL IN |
| Bore Diameter | 0.6880 INCHES NOMINAL IN |
| Material | STEEL |
| 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 |
|---|---|
| 330030305 | S.d.m.o. Industries (FRA) |
| 205094 | Cummins Ltd (GBR) |
| 02.01 OPTION PP6188/2 | Cummins Ltd (GBR) |
| 205094 PRIMARY | Cummins Inc. (USA) |
| 02.01 OPTION PP6188 REFERENCE 2 | Cummins Ltd (GBR) |
NSN 5340-01-042-9555 is a Seat,helical Compression Spring, manufactured by Cummins Inc., classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-042-9555 has 5 manufacturer part numbers on file: 330030305 (S.d.m.o. Industries), 205094 (Cummins Ltd), 02.01 OPTION PP6188/2 (Cummins Ltd), 205094 (Cummins Inc.), 02.01 OPTION PP6188 REFERENCE 2 (Cummins Ltd).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-687-6298. Verify interchangeability with system specifications before substitution.
Key specifications for 205094: Overall Height: 0.5620 INCHES NOMINAL IN; Countersink Angle in Deg: 45.0; First Step Diameter: 1.3120 INCHES NOMINAL IN; End Diameter: 0.9060 INCHES NOMINAL IN. 16 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.