The Breather, cataloged under National Stock Number 4310-00-003-8392, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Falls Filtration Technologies, Inc.. Government technical data includes 4 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.
| Parameter | Value |
|---|---|
| NSN | 4310-00-003-8392 |
| Primary Part Number | HSGK |
| Item Name | Breather |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Falls Filtration Technologies, Inc. |
| Status | ACTIVE |
| Outside Diameter | 3.740 INCHES MAXIMUM IN |
| Connection Type | THREADED |
| Body Material | STEEL |
| Thread Size and Series/type Designator | 1 1/2-11 1/2 NPT |
| 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 |
|---|---|
| HSGK PRIMARY | Falls Filtration Technologies, Inc. (USA) |
| 001-013059-999 | Tritan Corp (USA) |
NSN 4310-00-003-8392 is a Breather, manufactured by Falls Filtration Technologies, Inc., classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-00-003-8392 has 2 manufacturer part numbers on file: HSGK (Falls Filtration Technologies, Inc.), 001-013059-999 (Tritan Corp).
1 possible match (shared part number, not a government interchangeability claim): 3040-01-302-3010. Verify interchangeability with system specifications before substitution.
Key specifications for HSGK: Outside Diameter: 3.740 INCHES MAXIMUM IN; Connection Type: THREADED; Overall Length: 4.500 INCHES MAXIMUM IN; Body Material: STEEL. 4 specifications are documented in the U.S. Government catalog.
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.