The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-349-4675, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Trw Inc Trw Intl Trade Government Sales Dept. Government technical data includes 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5340-00-349-4675 |
| Primary Part Number | SR297 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Trw Inc Trw Intl Trade Government Sales Dept |
| Status | ACTIVE |
| Countersink Angle in Deg | 15.0 |
| First Step Diameter | 1.3400 INCHES NOMINAL IN |
| End Diameter | 0.9810 INCHES NOMINAL IN |
| Countersink Diameter | 0.7250 INCHES NOMINAL IN |
| Distance From End to First Step | 0.3750 INCHES NOMINAL IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Counterbore Length | 0.3750 INCHES NOMINAL IN |
| Features Provided | CASEHARDENED |
| Counterbore Diameter | 0.6330 INCHES NOMINAL IN |
| Chamfer Angle in Deg | 15.0 |
| Bore Diameter | 0.4530 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 |
| Part Number | Manufacturer |
|---|---|
| SR297 | Trw Inc Trw Intl Trade Government Sales Dept (USA) |
| Reference | Meaning |
|---|---|
| B5Q6514A | 3/9 Design control — primary reference Ford Motor Co Ford Parts and Service Div Government Part Sales |
| B5Q6514A | 5/9 Secondary reference Ford Motor Company |
NSN 5340-00-349-4675 is a Seat,helical Compression Spring, manufactured by Trw Inc Trw Intl Trade Government Sales Dept, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-349-4675 has 1 manufacturer part number on file: SR297 (Trw Inc Trw Intl Trade Government Sales Dept).
Key specifications for SR297: Overall Height: 0.4860 INCHES NOMINAL IN; Countersink Angle in Deg: 15.0; First Step Diameter: 1.3400 INCHES NOMINAL IN; End Diameter: 0.9810 INCHES NOMINAL IN. 13 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.