The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-054-2456, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Brinkley Technology Group Llc Dba Hercules Manufacturing. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-054-2456 |
| Primary Part Number | 255023 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Brinkley Technology Group Llc Dba Hercules Manufacturing |
| Status | ACTIVE |
| Countersink Angle in Deg | 45.0 |
| First Step Diameter | 0.9320 INCHES NOMINAL IN |
| End Diameter | 0.6300 INCHES NOMINAL IN |
| Seat Angle in Deg | 52.0 |
| Countersink Diameter | 0.5620 INCHES NOMINAL IN |
| Second End Diameter | 0.8400 INCHES NOMINAL IN |
| Distance From End to First Step | 0.0510 INCHES NOMINAL IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Second Step Diameter | 1.1880 INCHES NOMINAL IN |
| Bore Taper in Deg | 6.0 |
| First Step Length | 0.1880 INCHES NOMINAL IN |
| Bore Diameter | 0.5000 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 |
|---|---|
| 255023 PRIMARY | Brinkley Technology Group Llc Dba Hercules Manufacturing (USA) |
| Reference | Meaning |
|---|---|
| 255023 | 5/9 Secondary reference Hercules Engine Co Inc |
NSN 5340-01-054-2456 is a Seat,helical Compression Spring, manufactured by Brinkley Technology Group Llc Dba Hercules Manufacturing, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-054-2456 has 1 manufacturer part number on file: 255023 (Brinkley Technology Group Llc Dba Hercules Manufacturing).
Key specifications for 255023: Overall Height: 0.3480 INCHES NOMINAL IN; Countersink Angle in Deg: 45.0; First Step Diameter: 0.9320 INCHES NOMINAL IN; End Diameter: 0.6300 INCHES NOMINAL IN. 14 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.