The Cap,protective,dust and Moisture, cataloged under National Stock Number 5340-01-640-6603, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Sinclair and Rush Inc. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-640-6603 |
| Primary Part Number | 508213 |
| Item Name | Cap,protective,dust and Moisture |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Sinclair and Rush Inc |
| Status | ACTIVE |
| Design Type | FRICTION |
| Opening Inside Diameter for Which Designed | 0.250 INCHES NOMINAL IN |
| Material | RUBBER SYNTHETIC |
| Round Cap Outside Surface Condition | SMOOTH |
| 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 |
NSN 5340-01-640-6603 is a Cap,protective,dust and Moisture, manufactured by Sinclair and Rush Inc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-640-6603 has 2 manufacturer part numbers on file: 508213 (Sinclair and Rush Inc), 6448K77 (Mcmaster-Carr Supply Company).
Key specifications for 508213: Overall Height: 1.000 INCHES NOMINAL IN; Design Type: FRICTION; Opening Inside Diameter for Which Designed: 0.250 INCHES NOMINAL IN; Special Features: MATERIAL IS EPDM;HEIGHT LISTED IS INSIDE HEIGHT;COLOR IS BLCK;DUROMETER IS 40A-70A;CHEMICAL RESISTANT;MAX TEMPERATURE IS 200.0 DEGREES F A. 4 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.