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Safety Relief Valve

NSN: 4820-00-040-3134 | Model: 571973

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.

NSN Properties and Flags
NATO Stock Number
4820-00-040-3134
DEMIL
NO
Thread Class
2b 1st end
Thread Direction
Right-hand 4th end
Flow Control Device
Poppet
Disk Loading Method
Spring
Renewable Seat Ring Type
Bonded
Connection Style
Gasket sea (boss) 2nd end
Valve Operation Method
Automatic
Connection Type
Threaded internal tube 1st end
Mounting Facility
Bracket
Thread Size
0.875 inches 4th end
Outside Diameter Tube Accommodated
0.500 inches 1st end
Material
Steel seat
Surface Treatment
Anodize
Style Designator
Angle
Thread Series Designator
Unf 4th end

Pricing and Availability

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NSN 4820-00-040-3134 Datasheet

Supply Class (FSC):
Nonpowered Valves
Cross Reference:
  • 571973
  • 906004
  • 222784
  • 571973
  • 571973
  • 222784
  • 571973
Cage Codes:
  • Lutron Electronics Co., Inc. (CAGE 31322)
  • Essex Industries, Inc. (CAGE 55469)
  • Turbo Power & Marine System Inc (CAGE 11449)
  • Stewart Industries Inc Bossert (CAGE 03113)
  • United Technologies Corporation (CAGE 77445)
Schedule B & Trade:
  • Schedule B: 8481400000 (NAICS 332911)

    Safety or relief valves

  • SITC: 74740

    Safety or relief valves

  • End Use: 21180

    Industrial machines, other

Identification:
HMIC

N - Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

PMIC

U - Precious metal content is unknown

CRITL

- The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Freight Information:
  • NMFC:

    127220 - Pressure reg/red/relief valves noi

  • WCC:

    594 - Pumps and parts, (machinery and parts),(less than 35 feet)

  • SHC:

    9 - Other or no special handling required (sh)

  • ADC:

    A - Shipment is not a consolidation and does not exceed 84 inches in any dimension.

  • ACC:

    B - Construction materials: includes paint and related materials, prefabricated building, wood products, metal and composition mater

  • LTL:

    P - 77.5

  • TCC:

    Z - No special type of cargo code applicable

NSN Management Codes:
  • SOS
    Sms
  • AAC
    J
  • Quantity per pack
    1
  • Unit of Measure
    Ea
  • Shelf Life
    N/A
  • Classification Control
    U
  • MGMT_CTL
    9b-----
  • Repariability

Questions & Answers:

What are the historical prices recorded for this stock number?
Historical data shows pricing from $2,499.09 to $4,165.16..
Does NSN 4820-00-040-3134 have a shelf life?
No. There is no shelf life applicable for this NSN.
What NATO entities are users of this NSN?
Department Of The Navy, and Spain
What is the NIIN of NSN 4820-00-040-3134?
000403134 or 00-040-3134
Does NSN 4820-00-040-3134 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 4820-00-040-3134?
No solicitations for this NSN.
When was this national stock number assigned to the federal catalog?
Jan 01, 1963