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TA4 ✓ Verified by PartsTable
Legrand · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The VALVE,AUXILIARY PISTON is a Legrand industrial component. Key specifications include end_item_identification: STANDARD ABRASIVES HOLDER PADS, general_characteristics_item_description: STEEL; 2 IN. LG; 1/4 IN.

DIA IN, part_name_assigned_by_controlling_agency: TRANSDUCER ASSEMBLY, TRANSDUCER W/FEMALE AMP CON. (25 KHZ KHz. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4320-00-398-9319, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
TA4
NSN: 4320-00-398-9319
FSC: 4320
CAGE: 63857 — CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS (USA)
SPECIFICATIONS
end_item_identificationSTANDARD ABRASIVES HOLDER PADS
general_characteristics_item_descriptionSTEEL; 2 IN. LG; 1/4 IN. DIA IN
part_name_assigned_by_controlling_agencyTRANSDUCER ASSEMBLY, TRANSDUCER W/FEMALE AMP CON. (25 KHZ KHz
NSN4320-00-398-9319
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR MFR: Legrand VALVE,AUXILIARY PISTON TITLE COMPONENT PN TA4 MFR Legrand VALVE,AUXILIARY PISTON
KEY FEATURES
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: STEEL,6.937 IN. O/A LG,BOTH ENDS THD,1/2 IN.-20 UNF THD SIZE,FEMALE,1 IN. THD DEPTH IN
TECHNICAL CHARACTERISTICS (FLIS)
GENERAL CHARACTERISTICS ITEM DESCRIPTIONSTEEL,6.937 IN. O/A LG,BOTH ENDS THD,1/2 IN.-20 UNF THD SIZE,FEMALE,1 IN. THD DEPTH IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
540013Interchangeable
interchangeable cross-reference
interchangeable
TA4Interchangeable
interchangeable cross-reference
interchangeable
BS1124PC110Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is TA4?
TA4 is a VALVE,AUXILIARY PISTON manufactured by Legrand.
What parts can replace TA4?
There are 3 known substitutes for TA4: 540013, TA4, BS1124PC110. Substitute compatibility should be verified for your specific system.
What is the NSN for TA4?
TA4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4320-00-398-9319. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026