Safety Relief Valve

NSN: 4820-00-034-5877 | Model: MC7543-1

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

4820-00-034-5877

DEMIL

Yes - ITAR Controlled (Code B)

Thread Class

3a 1st end

Thread Direction

Right-hand 1st end

Flow Control Device

Poppet

Disk Loading Method

Spring

Connection Style

Flared (tube) 1st end

Valve Operation Method

Automatic

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

Parts List for Safety Relief Valve

Other components in the assembly of NSN 4820-00-034-5877

Valve Indicator-blowout
NSN 4820-00-188-1928

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.

Certified Quality Assurance

ISO 9001:2015 + AS9120B
Counterfeit Parts Prevention
100% Product Inspections
7 Year Record Retention
On Time Delivery
HAZMAT Certified
Worldwide Shipping

NSN 4820-00-034-5877 Datasheet

Supply Class (FSC):

Nonpowered Valves

Cross Reference:

MC7543-1
53-720057-1

Cage Codes:

Eaton Aerospace Llc (CAGE 76050)
Boeing Company, The (CAGE 76301)

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

A - Item does not contain precious metal.

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:

593 - Motors 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.
LTL:

P - 77.5
ACC:

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

Z - Other or no special handling required (sh)
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
Sf9bf-n
Repariability

Questions & Answers:
What are the historical prices recorded for this stock number?
Historical data shows pricing from $15,547.35 to $25,912.25..
Does NSN 4820-00-034-5877 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, Israel, Germany, Republic Of Korea, Greece, and Turkey
What is the NIIN of NSN 4820-00-034-5877?
000345877 or 00-034-5877
Does NSN 4820-00-034-5877 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 4820-00-034-5877?
No solicitations for this NSN.
When was this national stock number assigned to the federal catalog?
Nov 03, 1972