Product Details | VACUUM BREAKING VALVE

4820-01-442-6144 An item designed to automatically relieve vacuum, by the intake of air, when the internal pressure falls below atmospheric pressure. See also VALVE, VACUUM REGULATING.

Part Alternates: BMC3479A, 4820-01-442-6144, 01-442-6144, 4820014426144, 014426144

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 19 MAR 1997 01-442-6144

Drawings & Photos | NSN 4820-01-442-6144


Demand History | NSN 4820-01-442-6144

Part Number Request Date QTY Origin
BMC3479A 2025-07-205 2 DIBBS
BMC3479A 2024-09-263 2 DIBBS
BMC3479A 2023-04-110 3 DIBBS
BMC3479A 2022-06-181 4 DIBBS
BMC3479A 2020-10-294 4 DIBBS
BMC3479A 2020-03-90 12 DIBBS
BMC3479A 2020-03-79 12 DIBBS
BMC3479A 2019-02-56 7 DIBBS
BMC3479A 2019-02-45 7 DIBBS
4820-01-442-6144 2018-02-46 7 DIBBS
4820-01-442-6144 2017-09-271 5 DIBBS
4820-01-442-6144 2014-09-245 15 DIBBS
4820-01-442-6144 2014-08-232 15 DIBBS
4820-01-442-6144 2013-08-216 10 DIBBS
4820-01-442-6144 2013-04-112 9 DIBBS
4820-01-442-6144 2012-04-97 3 DIBBS
4820-01-442-6144 2012-03-79 4 DIBBS
4820-01-442-6144 2011-04-101 3 DIBBS
4820-01-442-6144 2011-04-91 3 DIBBS
4820-01-442-6144 2010-11-306 3 DIBBS
4820-01-442-6144 2010-10-302 2 DIBBS
4820-01-442-6144 2010-08-216 2 DIBBS
4820-01-442-6144 2010-02-41 4 DIBBS
4820-01-442-6144 2009-09-244 6 DIBBS

Cross Reference | NSN 4820-01-442-6144

Part Number Cage Code Manufacturer
BMC3479A 23798 BIDORO MFG CO PO BOX 103 HUNTINGTON STA NY 11746

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Technical Data | NSN 4820-01-442-6144

Characteristic Specifications
BODY MATERIAL COPPER ALLOY
SEAT MATERIAL RUBBER, BUNA-N
FLOW CONTROL DEVICE POPPET
FLOW CONTROL DEVICE MATERIAL COPPER ALLOY
END CONNECTION QUANTITY 2
FIRST END CONNECTION TYPE UNTHREADED INTERNAL TUBE
FIRST END STYLE DESIGNATOR H2 STREAMLINED WITH ONE BRAZING RING
FIRST END OUTSIDE DIAMETER TUBE ACCOMMODATED 0.750 INCHES NOMINAL
SECOND END RELATIONSHIP WITH FIRST END IDENTICAL
MEDIA FOR WHICH DESIGNED AIR
SPECIAL FEATURES ANGLE STYLE
III END ITEM IDENTIFICATION SHIP,OHIO CLASS SSN(TRIDENT)

Restrictions/Controls & Freight Information | NSN 4820-01-442-6144

Category Code Description
Shelf-Life Code:0Nondeteriorative
Hazardous Material Indicator CodeNThere is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials
Demilitarization Code:ANon-Munitions List Item/ Non-Strategic List Item - Demilitarization not required.
Controlled Inventory Item Code:UUNCLASSIFIED
Precious Metals Indicator Code:AItem does not contain precious metal
Criticality Code:X The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Category Code Description
NMF Description 127220 PRESSURE REG/RED/RELIEF VALVES NOI
Less than car load rating
Less than truck load rating P 77.5
Water commodity Code 594 unknown
Originating Activity Code AX Defense Supply Center Columbus
Columbus, OH 43216-5000
Air Dimension Code A Shipment is not a consolidation and does not exceed 72 inches in any dimension.
Air Commodity V Vehicles, machinery, shop and warehouse equipment and supplies, including special tools and equipment, ground servicing and special purpose vehicles, marine equipment and supplies, repair and maintenance parts for the above.
Air Special Handling Z No special handling required.
Special Handling Code 9 unknonwn
HAZMAT
Type of Cargo Z No special type of cargo code applicable

Management | NSN 4820-01-442-6144

Category Code Description
Cognizance Codes3BNavy-owned stocks of field level repairable DLA material
Naval Inventory Control Point, Mechanicsburg
Source of SupplySMSDefense Logistics Agency
Enterprise Business Systems
AgencyDNDepartment of the Navy
Service OrganizationNU.S. Navy
ReparabilityDField Level Reparables
Acquisition Advice CodesZINSURANCE/NUMERIC STOCKAGE OBJECTIVE ITEM # Items which may be required occasionally or intermittently, and prudence requires that a nominal quantity of materiel be stocked due to the essentiality or the lead time of the item. 1. The item is centrally managed, stocked, and issued. 2. Requisitions will be submitted in accordance with IMM/Service requisitioning procedures.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each