NSN 4820-00-957-6749

Check Valve

DEMIL

Shelf Life

UOM

NIIN

Demil:

Shelf Life:

N/A

UOM:

1 EA

NIIN:

009576749

Pricing & Availability Check

Submit this form for stock availability and pricing.

Inventory

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

NS: 1
AR: 1
NE: 1
SV: 1

Please note that inventory for this NSN was updated 12/08/2025 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,CHECK"

A valve permitting flow in one direction only. It does not have a stem, except when equipped with a lever and weight and has no pressure adjustment. It may be inline or cartridge (manifold) design.

4820-00-957-6749 Spec. NSN part characteristics

MRC

Name

Detail

MRC:

AAAR

Pipe Size Accommodated

0.500 inches 2nd end

MRC:

AAJD

Thread Class

3b 2nd end

MRC:

AAJF

Thread Direction

Right-hand 1st end

MRC:

ADQU

Flow Control Device

Poppet

MRC:

ADSU

Disk Loading Method

Spring

MRC:

ADZH

Renewable Seat Ring Type

Pressed-in

MRC:

AHNC

Connection Style

Gasket seal (boss) 2nd end

MRC:

AWLS

Connection Type

Threaded internal boss 2nd end

MRC:

CMLP

Thready Qty Per Inch (tpi)

16 2nd end

MRC:

CQJX

Thread Size

0.750 inches 2nd end

MRC:

CQRB

Seat Angle

45.0 degrees 2nd end

MRC:

CWFD

Outside Diameter Tube Accommodated

0.500 inches 1st end

MRC:

MEDA

Media For Which Designed

Fuel/oil, hydrocarbon single response

MRC:

SFTT

Surface Treatment

Anodize

MRC:

STDC

Surface Treatment Specification

Mil-a-8625 military specification single treatment response

MRC:

THSD

Thread Series Designator

Unf 2nd end

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:

8C163

Cage Code:

82829

RNCC:

RNVC:

DAC:

RNAAC:

Status:

MSDS:

SADC:

Part Number:

3C4296

Cage Code:

99240

RNCC:

RNVC:

DAC:

RNAAC:

Status:

MSDS:

SADC:

Part Number:

369A8326

Cage Code:

8V613

RNCC:

RNVC:

DAC:

RNAAC:

Status:

MSDS:

SADC:

Part Number:

369A8326

Cage Code:

02731

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Inidicates part number has been superseded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:

05487

FIIG:

A530B0

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.

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:

77.5

WCC:

594

TCC:

SHC:

ADC:

ACC:

Freight Codes Definitions:

Cargo Type (TCC) Z

No special type of cargo code applicable.

Water Commodity (WCC) 594

Pumps and parts, (machinery and parts),(less than 35 feet).

Air Commodity (ACC) V

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

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)