The Cap,protective,dust and Moisture, cataloged under National Stock Number 5340-00-173-2668, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Brp Us Inc. Government technical data includes 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5340-00-173-2668 |
| Primary Part Number | 301122 |
| Item Name | Cap,protective,dust and Moisture |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Brp Us Inc |
| Status | ACTIVE |
| Design Type | THREADED |
| Overall Diameter | 4.750 INCHES NOMINAL IN |
| Thread Pitch Diameters | +2.9970 TO 3.0130 INCHES IN |
| Surface Treatment | ANODIZE |
| Material | ALUMINUM |
| Thread Size and Series/type Designator | 2-1/2-7-1/2 NPSH |
| Inside Diameter Length | 0.9375 INCHES NOMINAL 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 |
NSN 5340-00-173-2668 is a Cap,protective,dust and Moisture, manufactured by Brp Us Inc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-173-2668 has 2 manufacturer part numbers on file: 301122 (Brp Us Inc), 301122 (Hale Products, Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 5915-01-330-3450, 3040-01-645-7147. Verify interchangeability with system specifications before substitution.
Key specifications for 301122: Design Type: THREADED; Overall Diameter: 4.750 INCHES NOMINAL IN; Thread Pitch Diameters: +2.9970 TO 3.0130 INCHES IN; Special Features: OUTSIDE SURFACE W/2 RIBS 0.312 IN. WIDE,180.0 DEGREE APART,0.296 IN. MIN. 0.300 IN. MAX HOLE IN TOP IN. 8 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.