PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21643Valve,expansion

Traulsen and Co Inc · NSN 4820-01-180-0756 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-180-0756 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-180-0756. Primary manufacturer part number: 21643.
Features
  • Valve,expansion — FSC 4820
  • 1 verified cross-reference
  • Primary manufacturer: Traulsen and Co Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,expansion, cataloged under National Stock Number 4820-01-180-0756, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Traulsen and Co Inc. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameValve,expansion
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersTraulsen and Co Inc (CAGE 88715)
Technical Specifications
ParameterValue
NSN4820-01-180-0756
Primary Part Number21643
Item NameValve,expansion
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerTraulsen and Co Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5950-00-647-832332357 INTERCHANGEABLE
Transformer,power
Freed Transformer Co
5330-00-834-868021643 INTERCHANGEABLE
Retainer,packing
Schneider Electric Systems Usa Inc
2910-01-171-884227950 INTERCHANGEABLE
Guard,carburetor
Stone Construction Equipment, Inc.
1650-01-327-395821643 INTERCHANGEABLE
Pad,hanger Arm
Parker Hannifin Corporation Div Hydraulic Systems Division
5355-01-329-3454 INTERCHANGEABLE
Knob
Cross-Reference Index
Part NumberManufacturer
21643 PRIMARY Traulsen and Co Inc (USA)
Related Parts
5950-00-647-8323INTERCHANGEABLE
TRANSFORMER,POWER
32357
5330-00-834-8680INTERCHANGEABLE
RETAINER,PACKING
21643
2910-01-171-8842INTERCHANGEABLE
GUARD,CARBURETOR
27950
1650-01-327-3958INTERCHANGEABLE
PAD,HANGER ARM
21643
5355-01-329-3454INTERCHANGEABLE
KNOB

Frequently Asked Questions

What is NSN 4820-01-180-0756?

NSN 4820-01-180-0756 is a Valve,expansion, manufactured by Traulsen and Co Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-180-0756?

NSN 4820-01-180-0756 has 1 cross-referenced part number: 21643 (Traulsen and Co Inc).

What NSN replaces 4820-01-180-0756?

There are 5 known substitutes for 4820-01-180-0756: 5950-00-647-8323, 5330-00-834-8680, 2910-01-171-8842 and 2 more. Verify interchangeability with system specifications before substitution.

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