PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4919Cock,drain

Weil Pump Co Inc · NSN 4820-01-230-3523 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-230-3523 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-230-3523. Primary manufacturer part number: 4919.
Features
  • Cock,drain — FSC 4820
  • Nominal Thread Size: 0.438 INCHES ALL ENDS IN
  • Valve Operation Method: MANUAL
  • Style Designator: STRAIGHT THRU
  • Thread Direction: RIGHT-HAND ALL ENDS
  • Thread Class: 3A ALL ENDS A
  • Connection Type: THREADED EXTERNAL TUBE ALL ENDS
  • Thread Series Designator: UNF ALL ENDS
Applications
  • Applications requiring Copper Alloy Overall construction
General Description

The Cock,drain, cataloged under National Stock Number 4820-01-230-3523, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Weil Pump Co Inc. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-230-3523
Primary Part Number4919
Item NameCock,drain
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerWeil Pump Co Inc
StatusACTIVE
Nominal Thread Size0.438 INCHES ALL ENDS IN
Valve Operation MethodMANUAL
Style DesignatorSTRAIGHT THRU
Thread DirectionRIGHT-HAND ALL ENDS
Thread Class3A ALL ENDS A
Connection TypeTHREADED EXTERNAL TUBE ALL ENDS
Thread Series DesignatorUNF ALL ENDS
MaterialCOPPER ALLOY OVERALL
Material Document and ClassificationMIL-C-1203 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Connection StylePLAIN (TUBE) ALL ENDS
Flow Control DeviceSTEM
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5998-00-106-26518601756-503 INTERCHANGEABLE
Electronic Components Assembly
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
5120-00-181-6784 INTERCHANGEABLE
Crowfoot Attachment,socket Wrenc
4130-00-217-7325 INTERCHANGEABLE
Gasket Kit,complete
5930-00-322-9613 INTERCHANGEABLE
Switch,push
5985-00-498-5084BP13787 INTERCHANGEABLE
Support,waveguide
Burke Products Inc
3120-00-536-25604919 INTERCHANGEABLE
Bearing,washer,thrust
Meggitt North Hollywood Inc
5330-00-558-02714912 INTERCHANGEABLE
Seal,plain Encased
Skf Usa Inc. Dba Skf Aerospace Sealing Solutions
6105-00-583-3975 INTERCHANGEABLE
Motor,alternating Current
5945-00-591-71094912 INTERCHANGEABLE
Relay,frequency
Precision Electronics, Inc
4320-00-890-5967FSP8434 INTERCHANGEABLE
Seal Assembly,shaft,spring Loade
Defense Maritime Solutions, Inc.
Cross-Reference Index
Part NumberManufacturer
4919 PRIMARY Weil Pump Co Inc (USA)
4912 Weil Pump Co Inc (USA)
A1743 PIECE 29 Weil Pump Co Inc (USA)
A1743 Weil Pump Co Inc (USA)
Related Parts
5998-00-106-2651INTERCHANGEABLE
ELECTRONIC COMPONENTS ASSEMBLY
8601756-503
5120-00-181-6784INTERCHANGEABLE
CROWFOOT ATTACHMENT,SOCKET WRENC
4130-00-217-7325INTERCHANGEABLE
GASKET KIT,COMPLETE
5930-00-322-9613INTERCHANGEABLE
SWITCH,PUSH
5985-00-498-5084INTERCHANGEABLE
SUPPORT,WAVEGUIDE
BP13787
3120-00-536-2560INTERCHANGEABLE
BEARING,WASHER,THRUST
4919
5330-00-558-0271INTERCHANGEABLE
SEAL,PLAIN ENCASED
4912
6105-00-583-3975INTERCHANGEABLE
MOTOR,ALTERNATING CURRENT
5945-00-591-7109INTERCHANGEABLE
RELAY,FREQUENCY
4912
4320-00-890-5967INTERCHANGEABLE
SEAL ASSEMBLY,SHAFT,SPRING LOADE
FSP8434
5306-01-013-5486INTERCHANGEABLE
BOLT
4912
5120-01-076-2581INTERCHANGEABLE
TOOL,CAP,PROTECTIVE
GS15949-1

Frequently Asked Questions

What is NSN 4820-01-230-3523?

NSN 4820-01-230-3523 is a Cock,drain, manufactured by Weil Pump Co Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-230-3523?

NSN 4820-01-230-3523 has 4 cross-referenced part numbers: 4919 (Weil Pump Co Inc), 4912 (Weil Pump Co Inc), A1743 PIECE 29 (Weil Pump Co Inc), A1743 (Weil Pump Co Inc).

What NSN replaces 4820-01-230-3523?

There are 12 known substitutes for 4820-01-230-3523: 5998-00-106-2651, 5120-00-181-6784, 4130-00-217-7325 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4919?

Key specifications for 4919: Nominal Thread Size: 0.438 INCHES ALL ENDS IN; Valve Operation Method: MANUAL; Style Designator: STRAIGHT THRU; Thread Direction: RIGHT-HAND ALL ENDS. 11 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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