The Retainer,helical Compression Spr, cataloged under National Stock Number 5340-01-499-2926, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5340-01-499-2926 |
| Primary Part Number | 563-6984943-43 |
| Item Name | Retainer,helical Compression Spr |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Flange Diameter | 0.750 INCHES NOMINAL IN |
| Flange Thickness | 0.266 INCHES NOMINAL IN |
| Body Outside Diameter | 0.625 INCHES NOMINAL IN |
| Body Inside Diameter | 0.484 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Lip Thickness | 0.266 INCHES NOMINAL IN |
| Bolt Circle Diameter | 0.188 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| End Hole Diameter | 0.250 INCHES NOMINAL IN |
| 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 |
|---|---|
| 563-6984943-43 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| H552-0405-43 | 3/2 Design control — primary reference U.S. Government activity |
| 6984943 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 5340-01-499-2926 is a Retainer,helical Compression Spr, manufactured by Naval Sea Systems Command, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-499-2926 has 1 manufacturer part number on file: 563-6984943-43 (Naval Sea Systems Command).
3 possible matches (shared part number, not a government interchangeability claim): 5340-01-499-5161, 3110-01-499-8556, 3110-01-499-8558. Verify interchangeability with system specifications before substitution.
Key specifications for 563-6984943-43: Flange Diameter: 0.750 INCHES NOMINAL IN; Overall Height: 0.938 INCHES NOMINAL IN; Flange Thickness: 0.266 INCHES NOMINAL IN; Body Outside Diameter: 0.625 INCHES NOMINAL IN. 9 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.