PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20520Valve,check

Cooper Surgical · NSN 4820-01-439-3515 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-439-3515 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-439-3515. Primary manufacturer part number: 20520.
Features
  • Valve,check — FSC 4820
  • 1 verified cross-reference
  • Primary manufacturer: Cooper Surgical
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,check, cataloged under National Stock Number 4820-01-439-3515, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Cooper Surgical. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-439-3515
Primary Part Number20520
Item NameValve,check
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerCooper Surgical
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
5325-00-232-921882-11-520-16 INTERCHANGEABLE
Stud,turnlock Fastener
Southco Inc
5935-00-259-3299QRE34S INTERCHANGEABLE
Connector,receptacle,electrical
Winchester Interconnect Corporation Dba Winchester Interconnect Div Winchester Interconnect
4820-00-393-428820520 INTERCHANGEABLE
Stem,needle Valve
Grove Valve Operations
5935-00-678-5997 INTERCHANGEABLE
Connector,electrica
5930-01-115-6944142-4 INTERCHANGEABLE
Switch Section,rotary
Tabet Manufacturing Company, Inc. Dba Tabet Manufacturing Co Inc
5920-01-162-455320-520 INTERCHANGEABLE
Fuse,cartridge
Rapid Power Technologies Inc
4520-01-194-6448STD1580 INTERCHANGEABLE
Heating Element,electrical,nonim
Basic American Inc
5120-01-349-1450 INTERCHANGEABLE
Wrench,box and Open End,combinat
5330-01-386-274220520 INTERCHANGEABLE
Seal,plain Encased
Skf Usa Inc. Dba Skf Aerospace Sealing Solutions
6545-01-607-339720520 INTERCHANGEABLE
Medical Equipment Set,physical T
The Hygenic Corporation
Cross-Reference Index
Part NumberManufacturer
20520 PRIMARY Cooper Surgical (USA)
Related Parts
5325-00-232-9218INTERCHANGEABLE
STUD,TURNLOCK FASTENER
82-11-520-16
5935-00-259-3299INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
QRE34S
4820-00-393-4288INTERCHANGEABLE
STEM,NEEDLE VALVE
20520
5935-00-678-5997INTERCHANGEABLE
CONNECTOR,ELECTRICA
5930-01-115-6944INTERCHANGEABLE
SWITCH SECTION,ROTARY
142-4
5920-01-162-4553INTERCHANGEABLE
FUSE,CARTRIDGE
20-520
4520-01-194-6448INTERCHANGEABLE
HEATING ELEMENT,ELECTRICAL,NONIM
STD1580
5120-01-349-1450INTERCHANGEABLE
WRENCH,BOX AND OPEN END,COMBINAT
5330-01-386-2742INTERCHANGEABLE
SEAL,PLAIN ENCASED
20520
6545-01-607-3397INTERCHANGEABLE
MEDICAL EQUIPMENT SET,PHYSICAL T
20520
3460-01-670-9436INTERCHANGEABLE
CHUCK,DRILL
20-520

Frequently Asked Questions

What is NSN 4820-01-439-3515?

NSN 4820-01-439-3515 is a Valve,check, manufactured by Cooper Surgical, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-439-3515?

NSN 4820-01-439-3515 has 1 cross-referenced part number: 20520 (Cooper Surgical).

What NSN replaces 4820-01-439-3515?

There are 11 known substitutes for 4820-01-439-3515: 5325-00-232-9218, 5935-00-259-3299, 4820-00-393-4288 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20520?

Key specifications for 20520: Special Features: END ITEM APPLICATION 6515-01-414-3607; CRYOSURGICAL SYSTEM; MODEL GE-2000. 1 total characteristics are documented in the Federal Logistics Information System.

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