The Flapper,valve,compressor Air, cataloged under National Stock Number 4820-00-353-2022, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 4820-00-353-2022 |
| Primary Part Number | 1F3079 |
| Item Name | Flapper,valve,compressor Air |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| General Characteristics Item Description | SWEDISH FLAPPER VALVE QUALITY STEEL;1.422 IN. O/A LG,0.374 IN. W,0.015 IN. MATERIAL THICKNESS,W/ONE HOLE IN SQ END 0.088 IN. DIA 0.127 IN. FROM END TO HOLE CENTER 0.185 IN. FROM SIDE TO HOLE CENTER,OTHER END ROUNDED;ITEM TO BE DEMAGNETIZED AFTER TUMBLING IN |
| 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 |
|---|---|
| 7350502 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 1F3079 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| P26723 | 5/9 Secondary reference Koehring Cranes and Excavators Inc Sub of Northwest Engineering Co |
| N1137 | 5/9 Secondary reference Haldex Brake Products Corporation |
| P26723 | 5/9 Secondary reference Koehring Co Lorain Div |
NSN 4820-00-353-2022 is a Flapper,valve,compressor Air, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-353-2022 has 2 manufacturer part numbers on file: 7350502 (U S Army Tank Automotive Command Amsta-Im-Mm), 1F3079 (Caterpillar Inc Div Caterpillar Defense).
2 possible matches (shared part number, not a government interchangeability claim): 5305-00-903-8287, 4910-01-669-0982. Verify interchangeability with system specifications before substitution.
Key specifications for 1F3079: General Characteristics Item Description: SWEDISH FLAPPER VALVE QUALITY STEEL;1.422 IN. O/A LG,0.374 IN. W,0.015 IN. MATERIAL THICKNESS,W/ONE HOLE IN SQ END 0.088 IN. DIA 0.127 IN. FROM END TO HOLE CENTER 0.185 IN. FROM SIDE TO HOLE CENTER,OTHER END ROUNDED;ITEM TO BE DEMAGNETIZED AFTER TUMBLING IN. 1 specification is 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.