PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

110800Valve,check

Sealco Air Controls Inc · NSN 4820-01-521-9920 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-521-9920 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-521-9920. Primary manufacturer part number: 110800.
Features
  • Valve,check — FSC 4820
  • 2 verified cross-references
  • Primary manufacturer: Sealco Air Controls Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,check, cataloged under National Stock Number 4820-01-521-9920, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Sealco Air Controls Inc. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-521-9920
Primary Part Number110800
Item NameValve,check
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerSealco Air Controls Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5310-00-209-4935 INTERCHANGEABLE
Washer,lock
5310-00-530-9106SLW01108CP INTERCHANGEABLE
Washer,lock
Honeywell Intl Inc Defense Avionics Systems
5310-00-596-7693 INTERCHANGEABLE
Washer,lock
6685-00-871-7264361-519-9001 INTERCHANGEABLE
Gage,pressure,dial Indicating
Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix
5120-01-017-9473 INTERCHANGEABLE
Pliers,retaining Ring
5365-01-156-8946110800 INTERCHANGEABLE
Spacer,ring
Dana Commercial Vehicle Products, Llc
6910-01-295-0787 INTERCHANGEABLE
Ventilation-Compression Unit,man
5895-01-493-9991110800 INTERCHANGEABLE
Interference Cancellation Unit
Edo Communications and Countermeasures Systems Inc
5930-01-584-1678110800 INTERCHANGEABLE
Switch,sensitive
Itt Mcdonnell-Miller a Unit of Itt Fluid Handling Div
6635-01-604-1875110800 INTERCHANGEABLE
Tester,density Moisture
Troxler Electronic Laboratories, Inc.
Cross-Reference Index
Part NumberManufacturer
450-31M-020 Link Suspension of Canada Lp (CAN)
110800 PRIMARY Sealco Air Controls Inc (USA)
Related Parts
5310-00-209-4935INTERCHANGEABLE
WASHER,LOCK
5310-00-530-9106INTERCHANGEABLE
WASHER,LOCK
SLW01108CP
5310-00-596-7693INTERCHANGEABLE
WASHER,LOCK
6685-00-871-7264INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
361-519-9001
5120-01-017-9473INTERCHANGEABLE
PLIERS,RETAINING RING
5365-01-156-8946INTERCHANGEABLE
SPACER,RING
110800
6910-01-295-0787INTERCHANGEABLE
VENTILATION-COMPRESSION UNIT,MAN
5895-01-493-9991INTERCHANGEABLE
INTERFERENCE CANCELLATION UNIT
110800
5930-01-584-1678INTERCHANGEABLE
SWITCH,SENSITIVE
110800
6635-01-604-1875INTERCHANGEABLE
TESTER,DENSITY MOISTURE
110800

Frequently Asked Questions

What is NSN 4820-01-521-9920?

NSN 4820-01-521-9920 is a Valve,check, manufactured by Sealco Air Controls Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-521-9920?

NSN 4820-01-521-9920 has 2 cross-referenced part numbers: 450-31M-020 (Link Suspension of Canada Lp), 110800 (Sealco Air Controls Inc).

What NSN replaces 4820-01-521-9920?

There are 10 known substitutes for 4820-01-521-9920: 5310-00-209-4935, 5310-00-530-9106, 5310-00-596-7693 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 110800?

Key specifications for 110800: End Item Identification: M872A4 NSN 2330-01-497-0706. 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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