NSN 4820-01-374-2926 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-374-2926. Manufacturer of record part number: 63983-90086.
Connection Style: PLAIN (SCREW-IN CARTRIDGE) ALL ENDS
Connection Type: THREADED CARTRIDGE ALL ENDS
Style Designator: SCREW-IN CARTRIDGE
Operating Pressure: 1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Adjustable Pressure Range: +50.0 TO 1500.0 POUNDS PER SQUARE INCH LBS
Material: ALUMINUM AND IRON BODY
Identification
NSN: 4820-01-374-2926
NIIN: 013742926
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 63983-90086
Manufacturer: Aai Systems Management Inc
General Description
The Valve,safety Relief, cataloged under National Stock Number 4820-01-374-2926, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Aai Systems Management Inc. Government technical data includes 8 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
4820-01-374-2926
Primary Part Number
63983-90086
Item Name
Valve,safety Relief
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Aai Systems Management Inc
Status
ACTIVE
Flow Control Device
DISK
Connection Style
PLAIN (SCREW-IN CARTRIDGE) ALL ENDS
Connection Type
THREADED CARTRIDGE ALL ENDS
Style Designator
SCREW-IN CARTRIDGE
Operating Pressure
1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
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 4820-01-374-2926?
NSN 4820-01-374-2926 is a Valve,safety Relief, manufactured by Aai Systems Management Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-374-2926?
NSN 4820-01-374-2926 has 2 manufacturer part numbers on file: 63983-90086 (Aai Systems Management Inc), RPEC-FBN-FBC (Sun Hydraulics Corporation).
What are the specifications of 63983-90086?
Key specifications for 63983-90086: Flow Control Device: DISK; Connection Style: PLAIN (SCREW-IN CARTRIDGE) ALL ENDS; Connection Type: THREADED CARTRIDGE ALL ENDS; Style Designator: SCREW-IN CARTRIDGE. 8 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-374-2926 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.