NSN 4820-00-034-5877

Velocity Fuse

About this product

Poppet flow control device, spring disk loading method, flared (tube) 1st end connection style, valve operation method: automatic.

Manufacturer part number MC7543-1 for national stock number 4820000345877.


  • Product description

    Safety Relief Valve NSN 4820-00-034-5877.

  • MPN or Model


  • Schedule B
    8481.40.0000 (Safety or relief valves)
  • NMF (National Motor Freight)
    127220 - Pressure Reg/red/relief Valves NOI
  • Unit Weight (Est.)
    0.4 lb
  • Thread Class
    3a 1st end
  • Thread Direction
    Right-hand 1st end
  • Flow Control Device
  • Disk Loading Method
  • Connection Style
    Flared (tube) 1st end
  • Valve Operation Method
  • Connection Type
    Threaded external tube 1st end
  • Thready Qty Per Inch (tpi)
    20 1st end
  • Maximum Operating Pressure
    290.0 pounds per square inch single response
  • Thread Size
    0.437 inches 1st end
  • Seat Angle
    37.0 degrees 1st end
  • Opening Pressure Setting
    23.0 pounds per square inch
  • Outside Diameter Tube Accommodated
    0.250 inches 1st end
  • Media For Which Designed
    Air single response
  • Style Designator
    Straight thru
  • Thread Series Designator
    Unf 1st end
More from these suppliers
Safety Relief Valve

A valve designed to automatically release excessive pressures. It is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. It is not designed for regulation of continuously fluctuating loads. It may be inline or cartridge (manifold) design. Excludes valve (1), relief, pressure and temperature.

Mechanic Bill explains Velocity Fuse

Pricing and Availability

Get a quote for 4820-00-034-5877 safety relief valve
Your Email:
Your Name:
Company Name:
Optional reference:
NSN 4820000345877

We do not share, sell, or distribute your information to any third party.
Privacy | Terms

All major credit cards accepted as well as gov. p-cards
Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
MC7543-1 Eaton Aerospace Llc
53-720057-1 Boeing Company, The
Stock Check
Availability of this NSN has not been updated recently. Submit the pricing and availbility form above to receive an up to date quote.