NSN 4820-00-173-1834

Safety Relief Valve

DEMIL

Shelf Life

UOM

NIIN

Demil:

Shelf Life:

N/A

UOM:

1 EA

NIIN:

001731834

Pricing & Availability Check

Submit this form for stock availability and pricing.

Inventory

This product may be available in the following quantities and conditions.

NS: 94
NE: 1

Please note that inventory for this NSN was updated 06/17/2025 and may have changed since then. Request a quote for up to date pricing and availability.

Product Definition Definition of approved item name (AIN): "VALVE,SAFETY RELIEF"

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.

4820-00-173-1834 Spec. NSN part characteristics

MRC

Name

Detail

MRC:

AAJF

Thread Direction

Right-hand all ends

MRC:

ADQU

Flow Control Device

Diaphragm

MRC:

ADSR

Bonnet Type

Inside spring

MRC:

ADST

Bonnet Attachment Method

Threaded

MRC:

ADSU

Disk Loading Method

Spring

MRC:

ADZH

Renewable Seat Ring Type

Threaded

MRC:

AEHZ

Maximum Operating Temp

150.0 degrees fahrenheit single response

MRC:

AHNC

Connection Style

Plain, optional en (pipe) all ends

MRC:

AQLR

Valve Operation Method

Automatic

MRC:

AWLS

Connection Type

Threaded internal pipe all ends

MRC:

AZGM

Mounting Facility

Bulkhead

MRC:

CBBL

Features Provided

Pressure tight outlet side

MRC:

CQCY

Adjustable Pressure Range

+1.0 to 50.0 pounds per square inch

MRC:

CQGM

Maximum Operating Pressure

50.0 pounds per square inch single response

MRC:

CQJX

Thread Size

0.250 inches all ends

MRC:

MATT

Material

Rubber butadiene-acrylonitrile class nbr flow control device

MRC:

MEDA

Media For Which Designed

Air 1st response

MRC:

STYL

Style Designator

Angle

MRC:

THSD

Thread Series Designator

Npt all ends

Cross Reference Parts Part numbers that meet the specification outlined on this page and set by the OEM

Part Number

Cage

RNCC

RNVC

DAC

RNAAC

Status

MSDS

SADC

Part Number:

142C687H01

Cage Code:

97942

RNCC:

RNVC:

DAC:

RNAAC:

Status:

MSDS:

SADC:

Part Number:

V06-221-NNEA

Cage Code:

43990

RNCC:

RNVC:

DAC:

RNAAC:

Status:

MSDS:

SADC:

Part Number:

35510

Cage Code:

51805

RNCC:

RNVC:

DAC:

RNAAC:

Status:

MSDS:

SADC:

Part Number:

V06-221-NNEA

Cage Code:

57824

RNCC:

RNVC:

DAC:

RNAAC:

Status:

MSDS:

SADC:

Part Number:

V06-221NNEAU

Cage Code:

43990

RNCC:

RNVC:

DAC:

RNAAC:

Status:

MSDS:

SADC:

Indicates a design/source control reference item

Inidicates part number has been superseded

Identification Item Identification Guide (IIG) and Item Name Code (INC)

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

05488

FIIG:

A046B0

Concept No.:

App. Key:

Cond. Code:

Status:

Special material and handling

HMIC

PMIC

ESD

ENAC

ADPE

CRITL

HMIC:

PMIC:

ESD:

ADPE:

CRITL:

Hazmat (HMIC) N

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

Precious Metals (PMIC) U

Precious metal content is unknown

Criticality X

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

Import and Export

Schedule B

NAIC

End Use

SITC

USDA

HITECH

Schedule B:

8481400000

NAICS:

332911

End Use Class:

21180

SITC:

74740

USDA:

HITECH:

Schedule B Codes Definitions:

Schedule B 8481400000

Safety Or Relief Valves

End Use Code 21180

Industrial Machines, Other

Standard Intl. Trade Class (SITC) 74740

Safety Or Relief Valves

National motor freight and handling

NMFC

Class

UFC

LTL

LCL

WCC

TCC

SHC

ADC

ACC

NMFC:

127220

NMF Description:

Pressure Reg/red/relief Valves Noi

UFC:

64490

LTL:

77.5

LCL:

WCC:

576

TCC:

SHC:

ADC:

ACC:

Freight Codes Definitions:

Cargo Type (TCC) Z

No special type of cargo code applicable.

Water Commodity (WCC) 576

Metal and metal products, nos, (less than 35 feet).

Air Commodity (ACC) B

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

Air Dimensions (ADC) A

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

Air Special Handling (SHC) 9

Other or no special handling required (sh)