The Boot,dust and Moisture Seal, cataloged under National Stock Number 5340-01-541-5331, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Oshkosh Defense Llc. Government technical data includes 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-541-5331 |
| Primary Part Number | 4HB961 |
| Item Name | Boot,dust and Moisture Seal |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| Opening Inside Diameter | 3.312 INCHES NOMINAL IN |
| Supplementary Features | MAT OVERLAP IS MIN OF 5/8 INCHES AND MAX OF 3/4 INCHES, TOP IS 66 DEGREES CURVE, TOP IS RADUS OF 9 1/16 AND BOTTOM RADUS IS 16 1/16 IN |
| Style Designator | THRU-HOLE |
| Base Inside Diameter | 5.875 INCHES NOMINAL IN |
| Material | COTTON BODY |
| 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 |
|---|---|
| 4HB961 | Oshkosh Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| 4HB961 | 5/9 Secondary reference Oshkosh Corp |
| 3352859 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5340-01-541-5331 is a Boot,dust and Moisture Seal, manufactured by Oshkosh Defense Llc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-541-5331 has 1 manufacturer part number on file: 4HB961 (Oshkosh Defense Llc).
Key specifications for 4HB961: Overall Height: 7.000 INCHES NOMINAL IN; Opening Inside Diameter: 3.312 INCHES NOMINAL IN; Supplementary Features: MAT OVERLAP IS MIN OF 5/8 INCHES AND MAX OF 3/4 INCHES, TOP IS 66 DEGREES CURVE, TOP IS RADUS OF 9 1/16 AND BOTTOM RADUS IS 16 1/16 IN; Style Designator: THRU-HOLE. 5 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.