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Last Modified: Nov 12, 2019

NSN 4820-00-001-6553 Valve, Safety Relief

MFG Part Numbers: A51K56028-1, A51K56028-1

Cross Reference Parts for NSN 4820-00-001-6553

MFG Part Number ISC RNVC RNCC HCC MSDS SADC DAC

A51K56028-1

2 9 5 1

A51K56028-1

2 2 3 1

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Part Information for NSN 4820-00-001-6553 (4820000016553)

Item Name: VALVE,SAFETY RELIEF
Federal Supply Class (FSC): 4820
NIIN: 00-001-6553 (000016553)
Definition: 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.
NMF Description: PRESSURE REG/RED/RELIEF VALVES NOI

Item Specifics

Federal Supply Class (FSC)
Valves Nonpowered
Connection Style
External seat for gasket seal (boss) 1st end AHNC
Connection Type
Threaded external boss 1st end AWLS
Disk Loading Method
Spring ADSU
Features Provided
Pressure tight outlet side CBBL
Flow Control Device
Poppet ADQU
Material
Steel overall MATT
Nominal Outside Diameter Tube Accommodated
0.875 inches 1st end CWFD
Nominal Thread Size
1.187 inches 1st end CQJX
Style Designator
Straight thru STYL
Thread Class
3a 1st end AAJD
Thread Direction
Right-hand 1st end AAJF
Thread Quantity Per Inch
16 1st end CMLP
Thread Series Designator
Unj 1st end THSD
Valve Operation Method
Automatic AQLR

Trade Control Compliance Schedule B Export Code: A ten position numeric code that identifies an item exported overseas. this unique identification code is assigned by the U.S. Census Bureau.

Schedule B Sch. B Description Demilitarization Classification ITAR Regulation
8481400000 Safety or relief valves Non-usml/non-ccli - no demil or dod tsc required. department of commerce may impose licensing requirements to certain destinations. (note 9). Unclassified Not ITAR Controlled

MOE / End Users Represents the subdivisions of a US governmental organization or an agency of the North Atlantic Treaty Organization (NATO), and other friendly governments and international organizations participating in the federal catalog program.

Country / Entity Name MOE
Department Of The Navy
Department Of The Navy ZZ

Material & Special Handling Item material and handling information

Code Description Value Meaning
HMIRS 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 Indicator U Precious metal content is unknown
Criticality Code 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 NMFC: A six position numeric code, which divides articles into groups or classes according to physical characteristics. The classification is based on truckloads vs. less than truckload.

Code Description Code Value Meaning
NMF Description NMFC 127220 Pressure Reg/red/relief Valves Noi
Less than a truck load rating LTL P 77.5
Water Commodity WCC 594 Pumps and parts, (machinery and parts),(less than 35 feet)
Type of Cargo TCC Z No special type of cargo code applicable
Special Handling SHC 9 Other or no special handling required (sh)
Air Dimension Code ADC A Shipment is not a consolidation and does not exceed 84 inches in any dimension.
Air Commodity ACC V Trailers, vehicles, machinery, shop and warehouse equipment and supplies including special tools and equipment, ground servicing and special purpose vehicles, trailers, marine equipment and supplies, repair and maintenance parts for the above.
Air Special Handling ASH Array No special handling required.

Item Identification | Valves, Nonpowered

4820-00-001-6553, 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.

Supply Class (FSC)NSN AssignmentNIINItem Name Code (INC)
4820 Sep 29, 1972 000016553 05488 (Valve, Safety Relief)

Safety Relief Valves Cross Reference

A51K56028-1 Cage Code 61174
A51K56028-1 Cage Code 26512

Codes

COUNTRY CODE: 00
CIIC: U
DML: A
HMIC: N
MGMT CTRL: -------
SOS: SMS
INC: 5488
WEAPON SYSTEM: AIRCRAFT, TOMCAT F-14
AAC: J
CRITL CODE: X
DEMIL CODE: A
S A: DS
MGMT CTL: -------
NIIN ASGMT: 29-SEP-72
QUP: 1
SLC: 0
UI: EA
CAGE: 26512
RNCC: 5
RNVC: 9

Management

Navy Flag

Navy

Cognizance 9B – Naval inventory control point, mechanicsburg
Special Material
Requisition Restriction
Special Material Content
Navy Flag

Navy Management Code Definition

Cognizance (COG) Identifies the inventory manager (IM) and inventory control point (ICP).
Special Material (SMIC) Categorizes material on the basis of requirements for source or quality control, technical design, or configuration control, procurement, stocking and issue control, special receipt, inspection, testing, storage, or handling
Req. Restriction (IRRC) Item requisition instructions.
Special Material (SMCC) Indicated that an item represents or contains peculiar material requiring special treatment, precautions, or management.
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