PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20421Valve,ball

United States Plastic Corp · NSN 4820-01-672-6818 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-672-6818 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-672-6818. Primary manufacturer part number: 20421.
Features
  • Valve,ball — FSC 4820
  • Operating Pressure: 150.00 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
  • Valve Size: 0.500 INCHES IN
  • 2 verified cross-references
  • Primary manufacturer: United States Plastic Corp
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,ball, cataloged under National Stock Number 4820-01-672-6818, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is United States Plastic Corp. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 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.

Technical Specifications
ParameterValue
NSN4820-01-672-6818
Primary Part Number20421
Item NameValve,ball
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerUnited States Plastic Corp
StatusACTIVE
Operating Pressure150.00 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Valve Size0.500 INCHES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
6210-00-223-64652042-1 INTERCHANGEABLE
Light Assembly,indicator
Safran Electronics & Defense, Avionics Usa, Llc
5940-00-503-6368245004 INTERCHANGEABLE
Terminal,stud
Cae Usa Inc.
5815-00-600-2685 INTERCHANGEABLE
Plug,connector
6210-00-776-1661 INTERCHANGEABLE
Lens,light
5999-00-790-16168513216 INTERCHANGEABLE
Contact,electrical
Us Army Aviation and Missile Command
5330-01-017-153520421 INTERCHANGEABLE
Gasket
Parker-Hannifin Corporation Dba Parker Hannifin Advanced Products Co Div Composite Sealing Systems Division
5310-01-391-4277 INTERCHANGEABLE
Washer,lock
6550-01-408-4901R20421 INTERCHANGEABLE
Reference Standard Set,latex Par
Remel Inc.
5120-01-430-7993 INTERCHANGEABLE
Wrench,box and Open End,combinat
7920-01-585-41502042-1 INTERCHANGEABLE
Brush,scrub
Tech Spray Inc
Cross-Reference Index
Part NumberManufacturer
QVC1005SSEG Haywardindl. Products, Inc. (USA)
20421 PRIMARY United States Plastic Corp (USA)
Related Parts
6210-00-223-6465INTERCHANGEABLE
LIGHT ASSEMBLY,INDICATOR
2042-1
5940-00-503-6368INTERCHANGEABLE
TERMINAL,STUD
245004
5815-00-600-2685INTERCHANGEABLE
PLUG,CONNECTOR
6210-00-776-1661INTERCHANGEABLE
LENS,LIGHT
5999-00-790-1616INTERCHANGEABLE
CONTACT,ELECTRICAL
8513216
5330-01-017-1535INTERCHANGEABLE
GASKET
20421
5310-01-391-4277INTERCHANGEABLE
WASHER,LOCK
6550-01-408-4901INTERCHANGEABLE
REFERENCE STANDARD SET,LATEX PAR
R20421
5120-01-430-7993INTERCHANGEABLE
WRENCH,BOX AND OPEN END,COMBINAT
7920-01-585-4150INTERCHANGEABLE
BRUSH,SCRUB
2042-1
4310-01-706-2918INTERCHANGEABLE
RING,PISTON
18-20417-12R1

Frequently Asked Questions

What is NSN 4820-01-672-6818?

NSN 4820-01-672-6818 is a Valve,ball, manufactured by United States Plastic Corp, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-672-6818?

NSN 4820-01-672-6818 has 2 cross-referenced part numbers: QVC1005SSEG (Haywardindl. Products, Inc.), 20421 (United States Plastic Corp).

What NSN replaces 4820-01-672-6818?

There are 11 known substitutes for 4820-01-672-6818: 6210-00-223-6465, 5940-00-503-6368, 5815-00-600-2685 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20421?

Key specifications for 20421: Operating Pressure: 150.00 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Valve Size: 0.500 INCHES IN; Part Name Assigned by Controlling Agency: 1/2 INCHES SOCKET GRAY HAYWARD QVC SERIES COMPACT PVC BALL VALVE IN; Special Features: THERE IS NO DANGER OF LEAKAGE THROUGH ASSEMBLED PARTS; 73 DEGREES FAHRENHEIT; ETHYLENE PROPYLENE RUBBER (EPDM) O-RINGS. 4 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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