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Safety Relief Valve

NSN: 4820-01-045-5742 | Model: 577A-4D-100
ITAR Registered seal

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
Yes - ITAR Controlled (Code B)
End Application
Acft, type f-16a-d
Supplementary Features
Nha p/n 16p004-1
Fsc Application Data
Part of the cenfter fuselage fuel system defuel tubes and adapter
Recent Solicitations
Solicitation Return by Date Buyer Code Quantity
SPE7MC20T3592 2020-01-17 PMCMU 139 EA
SPE7MC19T2229 2018-11-26 PMCMU 72 EA
SPE7MC18T8230 2018-04-09 PMCMU 100 EA
SPE7MC17TQ521 2017-07-24 PMCMU 107 EA

Inventory Check

The last inventory check on this NSN was done on 10/12/2021. Due to rapid changes in inventory this may not be the current stock qty.

  • Serviceable: 1
  • New: 1
  • New Surplus: 1

Pricing and Availability

Send us a request for quote using the form below. Our team will contact you with an up to date pricing and availability quote ASAP.

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NSN 4820-01-045-5742 Datasheet

Supply Class (FSC):
Nonpowered Valves
Cross Reference:
  • 577A-4D-100
  • C577A-4D-100
  • Z02RV04-24
  • C225-9
  • Z02RV04-24
Cage Codes:
  • Circor Aerospace, Inc. (CAGE 91816)
  • Lockheed Martin Corporation (CAGE 81755)
  • Zevco Inc (CAGE 62701)
Schedule B & Trade:
  • Schedule B: 8481400000 (NAICS 332911)

    Safety or relief valves

  • SITC: 74740

    Safety or relief valves

  • End Use: 21180

    Industrial machines, other


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


A - Item does not contain precious metal.


- Represents items with no adp components


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

Freight Information:
  • NMFC:

    051080 - Faucets, bibcocks, gates valves

  • WCC:

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

  • ADC:

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

  • LCL:

    P - 77.5

  • ACC:

    V - Trailers, vehicles, machinery, shop and warehouse equipment and supplies including special tools and equipment, ground servicing

  • LTL:

    W - Rating variable

  • SHC:

    Z - Other or no special handling required (sh)

  • TCC:

    Z - No special type of cargo code applicable

NSN Management Codes:
  • SOS
  • AAC
  • Quantity per pack
  • Unit of Measure
  • Shelf Life
  • Classification Control
  • Repariability

Questions & Answers:

What are the historical prices recorded for this stock number?
Historical data shows pricing from $298.97 to $498.29..
Does NSN 4820-01-045-5742 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 Air Force, Department Of The Navy, Poland, Israel, Singapore, Belgium, Republic Of Korea, Netherlands, Portugal, Denmark, Norway, Greece, and Turkey
What is the NIIN of NSN 4820-01-045-5742?
010455742 or 01-045-5742
Does NSN 4820-01-045-5742 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 4820-01-045-5742?
Solicitation SPE7MC20T3592 for qty 139 on 01/07/2020
When was this national stock number assigned to the federal catalog?
Aug 04, 1977