The Breather, cataloged under National Stock Number 3040-01-733-2131, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Appleton Marine Inc. The record lists 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Breather |
| FSC / FSG | 3040 — Miscellaneous Power Transmission Equipment (FSG 30) |
| Manufacturers | Ldi Industries, Inc. Dba Ldi Industries Inc (CAGE 24346); Appleton Marine Inc (CAGE 70433) |
| Parameter | Value |
|---|---|
| NSN | 3040-01-733-2131 |
| Primary Part Number | YMD-12890 |
| Item Name | Breather |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Appleton Marine Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| CS9999-367942 | Ldi Industries, Inc. Dba Ldi Industries Inc (USA) |
| 419029900 | Appleton Marine Inc (USA) |
| YMD-12890 PRIMARY | Appleton Marine Inc (USA) |
| Reference | Meaning |
|---|---|
| AMD-2874 ITEM 33 | C/1 Advisory reference — outside the item-of-supply concept Appleton Marine Inc |
| AMD-2874 | D/9 Drawing number reference only Appleton Marine Inc |
NSN 3040-01-733-2131 is a Breather, manufactured by Appleton Marine Inc, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-733-2131 has 3 manufacturer part numbers on file: CS9999-367942 (Ldi Industries, Inc. Dba Ldi Industries Inc), 419029900 (Appleton Marine Inc), YMD-12890 (Appleton Marine Inc).
2 possible matches (shared part number, not a government interchangeability claim): 5330-01-733-2238, 5930-01-733-3502. Verify interchangeability with system specifications before substitution.
No hazard code in the DLA record (HMIC N). 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.