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PartsTable / COMPONENT / A503HP-3
A503HP-3 ✓ Verified by PartsTable
— · GATE VALVE
WHAT YOU NEED TO KNOW
Full open or full close only — never throttle Rising stem shows position visually
Throttling a gate valve erodes seats
PRODUCT OVERVIEW

The CAP,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL AND PLASTIC, special_features: NHA VALVE SWG CHK; DISK IS INCASED IN BUNA-N RUBBER, attachment_method: GROOVED, end_item_identification: W/S CODE NIMITZ CLASS CVN, valve_model_number_for_which_designed: 503NX001. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-463-4130, 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
A503HP-3
NSN: 4820-01-463-4130
FSC: 4820
CAGE: 61447 — VAL-MATIC VALVE AND MANUFACTURING CORPORATION (USA)
SPECIFICATIONS
materialSTEEL AND PLASTIC
special_featuresNHA VALVE SWG CHK; DISK IS INCASED IN BUNA-N RUBBER
attachment_methodGROOVED
end_item_identificationW/S CODE NIMITZ CLASS CVN
valve_model_number_for_which_designed503NX001
NSN4820-01-463-4130
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: A503HP-3 · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
VALVE MODEL NUMBER FOR WHICH DESIGNED: 503NX001
•
ATTACHMENT METHOD: GROOVED
•
MATERIAL: STEEL AND PLASTIC
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONW/S CODE NIMITZ CLASS CVN
SPECIAL FEATURESNHA VALVE SWG CHK; DISK IS INCASED IN BUNA-N RUBBER
VALVE MODEL NUMBER FOR WHICH DESIGNED503NX001
ATTACHMENT METHODGROOVED
MATERIALSTEEL AND PLASTIC
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
1645BInterchangeable
interchangeable cross-reference
interchangeable
G393231-1Interchangeable
interchangeable cross-reference
interchangeable
000993-801-1Interchangeable
interchangeable cross-reference
interchangeable
Z50136Interchangeable
interchangeable cross-reference
interchangeable
A503-3Interchangeable
interchangeable cross-reference
interchangeable
SS-796-PC3Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A503HP-3?
A503HP-3 is a CAP,VALVE.
What parts can replace A503HP-3?
There are 6 known substitutes for A503HP-3: 1645B, G393231-1, 000993-801-1 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A503HP-3?
A503HP-3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-463-4130. 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