The Breather Crankcase, cataloged under National Stock Number 2805-00-734-7637, is classified within Federal Supply Class 2805 (Gasoline Reciprocating Engines, Except Aircraft; and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Brinkley Technology Group Llc Dba Hercules Manufacturing. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Breather Crankcase |
| FSC / FSG | 2805 — Gasoline Reciprocating Engines, Except Aircraft; and Components (FSG 28) |
| Manufacturers | U S Army Tank Automotive Command Amsta-Im-Mm (CAGE 19207); Brinkley Technology Group Llc Dba Hercules Manufacturing (CAGE 1ML14); Falls Filtration Technologies, Inc. (CAGE 00736) |
| Parameter | Value |
|---|---|
| NSN | 2805-00-734-7637 |
| Primary Part Number | 403912 |
| Item Name | Breather Crankcase |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | Brinkley Technology Group Llc Dba Hercules Manufacturing |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 7347637 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 403912 PRIMARY | Brinkley Technology Group Llc Dba Hercules Manufacturing (USA) |
| B16033A | Falls Filtration Technologies, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 403912 | 5/9 Secondary reference Hercules Engine Co Inc |
NSN 2805-00-734-7637 is a Breather Crankcase, manufactured by Brinkley Technology Group Llc Dba Hercules Manufacturing, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-00-734-7637 has 3 manufacturer part numbers on file: 7347637 (U S Army Tank Automotive Command Amsta-Im-Mm), 403912 (Brinkley Technology Group Llc Dba Hercules Manufacturing), B16033A (Falls Filtration Technologies, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 2915-00-798-8513. 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.
NSN 2805-00-734-7637 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.