The Cap,protective,dust and Moisture, cataloged under National Stock Number 5340-01-139-4200, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Prestolite Electric Inc. 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 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 | 5340-01-139-4200 |
| Primary Part Number | 78990 |
| Item Name | Cap,protective,dust and Moisture |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Prestolite Electric Inc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416, TYPE 1, CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE |
| Design Type | FRICTION |
| Overall Diameter | 1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM IN |
| Tube Outside Diameter for Which Designed | 0.917 INCHES MINIMUM AND 0.920 INCHES MAXIMUM IN |
| Material Document and Classification | SAE 1010 ASSN STD SINGLE MATERIAL RESPONSE |
| Surface Treatment | CADMIUM |
| Material | STEEL |
| Inside Diameter Length | 0.150 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 78990 PRIMARY | Prestolite Electric Inc (USA) |
NSN 5340-01-139-4200 is a Cap,protective,dust and Moisture, manufactured by Prestolite Electric Inc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-139-4200 has 1 manufacturer part number on file: 78990 (Prestolite Electric Inc).
2 possible matches (shared part number, not a government interchangeability claim): 6210-01-161-2183, 4820-01-657-1857. Verify interchangeability with system specifications before substitution.
Key specifications for 78990: Surface Treatment Document and Classification: QQ-P-416, TYPE 1, CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE; Design Type: FRICTION; Overall Diameter: 1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM IN; Tube Outside Diameter for Which Designed: 0.917 INCHES MINIMUM AND 0.920 INCHES MAXIMUM 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.