PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5021-4 PT. NO. 6Disk,valve

Hunt Valve Company, Inc. · NSN 4820-01-521-8601 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-521-8601 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-521-8601. Primary manufacturer part number: 5021-4 PT. NO. 6.
Features
  • Disk,valve — FSC 4820
  • 3 verified cross-references
  • Primary manufacturer: Hunt Valve Company, Inc.
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Disk,valve, cataloged under National Stock Number 4820-01-521-8601, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Hunt Valve Company, 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 NameDisk,valve
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersHunt Valve Company, Inc. (CAGE 11859); Pima Valve, Llc (CAGE 30263)
Technical Specifications
ParameterValue
NSN4820-01-521-8601
Primary Part Number5021-4 PT. NO. 6
Item NameDisk,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerHunt Valve Company, Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
3040-00-356-3286SC-B-70100 INTERCHANGEABLE
Bell Crank
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5935-00-497-0938SMC2007114 INTERCHANGEABLE
Insert,electrical Connector
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5930-01-186-506550214 INTERCHANGEABLE
Switch,electrical
Setra Systems, Inc. Dba Gems Sensors
5995-01-214-1257300826-1 INTERCHANGEABLE
Lead,electrical
Moog Inc.
4820-01-521-61454805 INTERCHANGEABLE
Valve,stop-Check
Hunt Valve Company, Inc.
4820-01-521-8610 INTERCHANGEABLE
Stem,fluid Valve
4820-01-521-86185021-4 PT. NO. 17 INTERCHANGEABLE
Seat,valve
Hunt Valve Company, Inc.
4820-01-521-8619C202016263F INTERCHANGEABLE
Hinge,swing Check Valve
Hunt Valve Company, Inc.
5365-01-522-1302 INTERCHANGEABLE
Plug,machine Thread
5945-01-562-721150214 INTERCHANGEABLE
Relay,electromagnetic
Crispaire Corp Dba Marvair Co
Cross-Reference Index
Part NumberManufacturer
5021-4 PT. NO. 6 PRIMARY Hunt Valve Company, Inc. (USA)
5021-4 PT. NO. 6 Pima Valve, Llc (USA)
5021-4 Pima Valve, Llc (USA)
Related Parts
3040-00-356-3286INTERCHANGEABLE
BELL CRANK
SC-B-70100
5935-00-497-0938INTERCHANGEABLE
INSERT,ELECTRICAL CONNECTOR
SMC2007114
5930-01-186-5065INTERCHANGEABLE
SWITCH,ELECTRICAL
50214
5995-01-214-1257INTERCHANGEABLE
LEAD,ELECTRICAL
300826-1
4820-01-521-6145INTERCHANGEABLE
VALVE,STOP-CHECK
4805
4820-01-521-8610INTERCHANGEABLE
STEM,FLUID VALVE
4820-01-521-8618INTERCHANGEABLE
SEAT,VALVE
5021-4 PT. NO. 17
4820-01-521-8619INTERCHANGEABLE
HINGE,SWING CHECK VALVE
C202016263F
5365-01-522-1302INTERCHANGEABLE
PLUG,MACHINE THREAD
5945-01-562-7211INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
50214
7490-01-679-4717INTERCHANGEABLE
SHREDDING MACHINE,PAPER
50214

Frequently Asked Questions

What is NSN 4820-01-521-8601?

NSN 4820-01-521-8601 is a Disk,valve, manufactured by Hunt Valve Company, Inc., classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-521-8601?

NSN 4820-01-521-8601 has 3 cross-referenced part numbers: 5021-4 PT. NO. 6 (Hunt Valve Company, Inc.), 5021-4 PT. NO. 6 (Pima Valve, Llc), 5021-4 (Pima Valve, Llc).

What NSN replaces 4820-01-521-8601?

There are 11 known substitutes for 4820-01-521-8601: 3040-00-356-3286, 5935-00-497-0938, 5930-01-186-5065 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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