PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

50-CValve,flow Control

Exair Llc · NSN 4820-01-527-1991 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-527-1991 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-527-1991. Primary manufacturer part number: 50-C.
Features
  • Valve,flow Control — FSC 4820
  • Stem Material: PLASTIC
  • Body Material: PLASTIC
  • End Connection Quantity: 1
  • 1 verified cross-reference
  • Primary manufacturer: Exair Llc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,flow Control, cataloged under National Stock Number 4820-01-527-1991, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Exair Llc. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-527-1991
Primary Part Number50-C
Item NameValve,flow Control
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerExair Llc
StatusACTIVE
Stem MaterialPLASTIC
Body MaterialPLASTIC
End Connection Quantity1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
4130-00-100-3344E2812-8450-1 INTERCHANGEABLE
Cooling Coil,air,duct Type
Fluid Handling Llc
6685-00-452-61201124988 INTERCHANGEABLE
Thermostat,flow Control
Chrysler Realty Company Llc Dba Daimler Chrysler
3455-00-516-4042 INTERCHANGEABLE
Reamer,machine
5999-00-518-8333 INTERCHANGEABLE
Clip,electrical
6625-00-805-710250C INTERCHANGEABLE
Detecting Element,directional Co
Bird Electronic Corporation Div Bird Electronic Corp
6685-00-811-9327080-000853 INTERCHANGEABLE
Thermometer,indicating,capillary
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple
5950-00-946-2074P38500212 INTERCHANGEABLE
Transformer,power
Entron Industries Limited Partnership Dba Entron Industries Property Div
5985-00-947-8906335-270 INTERCHANGEABLE
Coupler,directional
Raytheon Company Dba Raytheon Co
5975-01-406-329450C INTERCHANGEABLE
Coupling Rod
Abb Installation Products Inc
Cross-Reference Index
Part NumberManufacturer
50-C PRIMARY Exair Llc (USA)
Related Parts
4130-00-100-3344INTERCHANGEABLE
COOLING COIL,AIR,DUCT TYPE
E2812-8450-1
6685-00-452-6120INTERCHANGEABLE
THERMOSTAT,FLOW CONTROL
1124988
3455-00-516-4042INTERCHANGEABLE
REAMER,MACHINE
5999-00-518-8333INTERCHANGEABLE
CLIP,ELECTRICAL
6625-00-805-7102INTERCHANGEABLE
DETECTING ELEMENT,DIRECTIONAL CO
50C
6685-00-811-9327INTERCHANGEABLE
THERMOMETER,INDICATING,CAPILLARY
080-000853
5950-00-946-2074INTERCHANGEABLE
TRANSFORMER,POWER
P38500212
5985-00-947-8906INTERCHANGEABLE
COUPLER,DIRECTIONAL
335-270
5975-01-406-3294INTERCHANGEABLE
COUPLING ROD
50C

Frequently Asked Questions

What is NSN 4820-01-527-1991?

NSN 4820-01-527-1991 is a Valve,flow Control, manufactured by Exair Llc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-527-1991?

NSN 4820-01-527-1991 has 1 cross-referenced part number: 50-C (Exair Llc).

What NSN replaces 4820-01-527-1991?

There are 9 known substitutes for 4820-01-527-1991: 4130-00-100-3344, 6685-00-452-6120, 3455-00-516-4042 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 50-C?

Key specifications for 50-C: Stem Material: PLASTIC; Body Material: PLASTIC; Part Name Assigned by Controlling Agency: GENERATOR; End Connection Quantity: 1. 6 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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