PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A-2557Valve,check

Kay Laboratories Inc · NSN 4820-01-286-1961 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-286-1961 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-286-1961. Primary manufacturer part number: A-2557.
Features
  • Valve,check — FSC 4820
  • 3 verified cross-references
  • Primary manufacturer: Kay Laboratories Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,check, cataloged under National Stock Number 4820-01-286-1961, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Kay Laboratories Inc. This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameValve,check
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersKay Laboratories Inc (CAGE 15499); Jet Spray Corp Jet Spray Customer Services Div (CAGE 15498)
Technical Specifications
ParameterValue
NSN4820-01-286-1961
Primary Part NumberA-2557
Item NameValve,check
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerKay Laboratories Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
3805-00-024-243112557 INTERCHANGEABLE
Shaft,control Lever
Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.
2910-00-164-38031255A7 INTERCHANGEABLE
Cap Assembly,tank,fuel
Protectoseal Co Container Div
2915-00-302-428312-557 INTERCHANGEABLE
Cap,internal Outlet,booster Pump
Ontic Engineering & Manufacturing, Inc Dba Ontic Us
1650-00-347-1278 INTERCHANGEABLE
Rotor Assy,valve
4935-00-350-6335 INTERCHANGEABLE
Wearplate,pump Assy
4320-00-410-902412557 INTERCHANGEABLE
Wearplate,pump
Itt Jabsco Products
5331-01-143-8257 INTERCHANGEABLE
O-Ring
5965-01-170-879912557 INTERCHANGEABLE
Loudspeaker,permanent Magnet
Edo-Aire
5305-01-273-498312557 INTERCHANGEABLE
Screw,cap,socket Head
Sps Technologies, Llc Dba PB Fasteners
6625-01-281-399412557 INTERCHANGEABLE
Indicator,electrical Potential
Auto Vehicle Parts Co Dba Au-Ve-Co
Cross-Reference Index
Part NumberManufacturer
A-2557 Kay Laboratories Inc (USA)
12557 Jet Spray Corp Jet Spray Customer Services Div (USA)
A-2557 Jet Spray Corp Jet Spray Customer Services Div (USA)
Related Parts
3805-00-024-2431INTERCHANGEABLE
SHAFT,CONTROL LEVER
12557
2910-00-164-3803INTERCHANGEABLE
CAP ASSEMBLY,TANK,FUEL
1255A7
2915-00-302-4283INTERCHANGEABLE
CAP,INTERNAL OUTLET,BOOSTER PUMP
12-557
1650-00-347-1278INTERCHANGEABLE
ROTOR ASSY,VALVE
4935-00-350-6335INTERCHANGEABLE
WEARPLATE,PUMP ASSY
4320-00-410-9024INTERCHANGEABLE
WEARPLATE,PUMP
12557
5331-01-143-8257INTERCHANGEABLE
O-RING
5965-01-170-8799INTERCHANGEABLE
LOUDSPEAKER,PERMANENT MAGNET
12557
5305-01-273-4983INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
12557
6625-01-281-3994INTERCHANGEABLE
INDICATOR,ELECTRICAL POTENTIAL
12557
5930-01-287-3751INTERCHANGEABLE
SWITCH,ROTARY
1-2557

Frequently Asked Questions

What is NSN 4820-01-286-1961?

NSN 4820-01-286-1961 is a Valve,check, manufactured by Kay Laboratories Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-286-1961?

NSN 4820-01-286-1961 has 3 cross-referenced part numbers: A-2557 (Kay Laboratories Inc), 12557 (Jet Spray Corp Jet Spray Customer Services Div), A-2557 (Jet Spray Corp Jet Spray Customer Services Div).

What NSN replaces 4820-01-286-1961?

There are 11 known substitutes for 4820-01-286-1961: 3805-00-024-2431, 2910-00-164-3803, 2915-00-302-4283 and 8 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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