The Boot,dust and Moisture Seal, cataloged under National Stock Number 5340-01-138-6801, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Triumph Controls, Llc Dba Triumph Controls, Llc. 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. 1 item shares 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 | 5340-01-138-6801 |
| Primary Part Number | 37800-1 |
| Item Name | Boot,dust and Moisture Seal |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Triumph Controls, Llc Dba Triumph Controls, Llc |
| Status | ACTIVE |
| FSC Application Data | A-10A AIRCRAFT ENGINE A |
| Opening Inside Diameter | 0.625 INCHES NOMINAL IN |
| Body Outside Diameter | 1.344 INCHES NOMINAL IN |
| Body Height | 3.375 INCHES NOMINAL IN |
| Style Designator | THRU-HOLE, EXPANDABLE |
| Material Document and Classification | B6657-1 MFR REF SINGLE MATERIAL RESPONSE BODY |
| Material Thickness | 0.037 INCHES MINIMUM AND 0.047 INCHES MAXIMUM IN |
| Material | RUBBER 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 |
NSN 5340-01-138-6801 is a Boot,dust and Moisture Seal, manufactured by Triumph Controls, Llc Dba Triumph Controls, Llc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-138-6801 has 2 manufacturer part numbers on file: 3780001-1 (Triumph Controls, Llc Dba Triumph Controls, Llc), 37800-1 (Triumph Controls, Llc Dba Triumph Controls, Llc).
1 possible match (shared part number, not a government interchangeability claim): 5120-01-567-4335. Verify interchangeability with system specifications before substitution.
Key specifications for 37800-1: Overall Height: 4.000 INCHES NOMINAL IN; FSC Application Data: A-10A AIRCRAFT ENGINE A; Opening Inside Diameter: 0.625 INCHES NOMINAL IN; Body Outside Diameter: 1.344 INCHES NOMINAL 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.