PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A-55321Seat,valve

Teikoku Usa Inc. Div Chempump, a Division of Teikoku Usa Inc · NSN 4820-01-202-8525 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-202-8525 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-202-8525. Primary manufacturer part number: A-55321.
Features
  • Seat,valve — FSC 4820
  • 3 verified cross-references
  • Primary manufacturer: Teikoku Usa Inc. Div Chempump, a Division of Teikoku Usa Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-202-8525, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Teikoku Usa Inc. Div Chempump, a Division of Teikoku Usa Inc. This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameSeat,valve
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersTeikoku Usa Inc. Div Chempump, a Division of Teikoku Usa Inc (CAGE 99827)
Technical Specifications
ParameterValue
NSN4820-01-202-8525
Primary Part NumberA-55321
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerTeikoku Usa Inc. Div Chempump, a Division of Teikoku Usa Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
3020-01-151-3524KG004 INTERCHANGEABLE
Gear Set,worm and G
Teikoku Usa Inc. Div Chempump, a Division of Teikoku Usa Inc
4730-01-232-711956176A010 INTERCHANGEABLE
Plug,pipe
Teikoku Usa Inc. Div Chempump, a Division of Teikoku Usa Inc
4730-01-232-7120A-38321 INTERCHANGEABLE
Plug,pipe
Teikoku Usa Inc. Div Chempump, a Division of Teikoku Usa Inc
4320-01-233-483955317A050 INTERCHANGEABLE
Rod,locking,pump
Teikoku Usa Inc. Div Chempump, a Division of Teikoku Usa Inc
6145-01-288-947685231 INTERCHANGEABLE
Cable,power,electrical
Belden Wire & Cable Company Llc Dba Belden Cdt Electronics Division
4320-01-509-1684202SM86-TE302 INTERCHANGEABLE
Pump Unit,reciprocating
Teikoku Usa Inc. Div Chempump, a Division of Teikoku Usa Inc
4820-01-509-219255048C290 INTERCHANGEABLE
Ball,check
Teikoku Usa Inc. Div Chempump, a Division of Teikoku Usa Inc
Cross-Reference Index
Part NumberManufacturer
55693 ITEM 37 Teikoku Usa Inc. Div Chempump, a Division of Teikoku Usa Inc (USA)
A-55321 PRIMARY Teikoku Usa Inc. Div Chempump, a Division of Teikoku Usa Inc (USA)
55693 Teikoku Usa Inc. Div Chempump, a Division of Teikoku Usa Inc (USA)
Related Parts
3020-01-151-3524INTERCHANGEABLE
GEAR SET,WORM AND G
KG004
4730-01-232-7119INTERCHANGEABLE
PLUG,PIPE
56176A010
4730-01-232-7120INTERCHANGEABLE
PLUG,PIPE
A-38321
4320-01-233-4839INTERCHANGEABLE
ROD,LOCKING,PUMP
55317A050
6145-01-288-9476INTERCHANGEABLE
CABLE,POWER,ELECTRICAL
85231
4320-01-509-1684INTERCHANGEABLE
PUMP UNIT,RECIPROCATING
202SM86-TE302
4820-01-509-2192INTERCHANGEABLE
BALL,CHECK
55048C290

Frequently Asked Questions

What is NSN 4820-01-202-8525?

NSN 4820-01-202-8525 is a Seat,valve, manufactured by Teikoku Usa Inc. Div Chempump, a Division of Teikoku Usa Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-202-8525?

NSN 4820-01-202-8525 has 3 cross-referenced part numbers: 55693 ITEM 37 (Teikoku Usa Inc. Div Chempump, a Division of Teikoku Usa Inc), A-55321 (Teikoku Usa Inc. Div Chempump, a Division of Teikoku Usa Inc), 55693 (Teikoku Usa Inc. Div Chempump, a Division of Teikoku Usa Inc).

What NSN replaces 4820-01-202-8525?

There are 7 known substitutes for 4820-01-202-8525: 3020-01-151-3524, 4730-01-232-7119, 4730-01-232-7120 and 4 more. Verify interchangeability with system specifications before substitution.

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