NSN 4820-01-666-2539 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-666-2539. Manufacturer of record part number: 055928A2.
Supply Items and Quantities: 1CHECK VALVE; 1 GASKET (B/W CASING AND CHECK VALVE); 1 GASKET (B/W CHECK VALVE AND SUCTION VALVE)
2 manufacturer part numbers on file
Manufacturer of record: Hartford Compressors Inc
Identification
NSN: 4820-01-666-2539
NIIN: 016662539
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 055928A2
Manufacturer: Hartford Compressors Inc
General Description
The Parts Kit,check Valve, cataloged under National Stock Number 4820-01-666-2539, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hartford Compressors Inc. Government technical data includes 2 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. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-01-666-2539
Primary Part Number
055928A2
Item Name
Parts Kit,check Valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Hartford Compressors Inc
Status
ACTIVE
Component Quantity
3
Supply Items and Quantities
1CHECK VALVE; 1 GASKET (B/W CASING AND CHECK VALVE); 1 GASKET (B/W CHECK VALVE AND SUCTION VALVE)
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097
4820-00-000-0097 · Item name not on file
4820-00-001-0010
VALVE,ROTARY,SELECTOR
4820-00-001-0020
4820-00-001-0020 · Item name not on file
4820-00-001-0021
4820-00-001-0021 · Item name not on file
4820-00-001-0032
4820-00-001-0032 · Item name not on file
4820-00-001-0037
VALVE,SAFETY RELIEF
4820-00-001-0042
4820-00-001-0042 · Item name not on file
4820-00-001-1230
4820-00-001-1230 · Item name not on file
Frequently Asked Questions
What is NSN 4820-01-666-2539?
NSN 4820-01-666-2539 is a Parts Kit,check Valve, manufactured by Hartford Compressors Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-666-2539?
NSN 4820-01-666-2539 has 2 manufacturer part numbers on file: 4227-020-P01-11 (Hartford Compressors Inc), 055928A2 (Hartford Compressors Inc).
What are the specifications of 055928A2?
Key specifications for 055928A2: Component Quantity: 3; Supply Items and Quantities: 1CHECK VALVE; 1 GASKET (B/W CASING AND CHECK VALVE); 1 GASKET (B/W CHECK VALVE AND SUCTION VALVE); Part Name Assigned by Controlling Agency: CHECK VALVE. 2 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-666-2539 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.