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Technical Data Sheet
PartsTable / COMPONENT / D42UU-03 1/2 X 3/4 IN.
D42UU-03 1/2 X 3/4 IN. ✓ 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 D42UU-03 1/2 X 3/4 IN. is a the manufacturer industrial component. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-052-3975, 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
D42UU-03 1/2 X 3/4 IN.
NSN: 4820-01-052-3975
FSC: 4820
CAGE: 65079 — DANCO VALVE COMPANY (USA)
SPECIFICATIONS
Part NumberD42UU-03 1/2 X 3/4 IN.
NSN4820-01-052-3975
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: D42UU-03 1/2 X 3/4 IN. · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-C-390,ALLOY D4/D/ FED SPEC SINGLE MATERIAL RESPONSE BODY
•
THREAD DIRECTION: RIGHT-HAND ALL ENDS
•
CONNECTION STYLE: PLAIN (PIPE) FIRST END
•
MEDIA FOR WHICH DESIGNED: AIR SINGLE RESPONSE
•
OPERATING PRESSURE: 50.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
THREAD SERIES DESIGNATOR: NPT ALL ENDS
•
CONNECTION TYPE: THREADED EXTERNAL PIPE ALL ENDS
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-C-390,ALLOY D4/D/ FED SPEC SINGLE MATERIAL RESPONSE BODY
THREAD DIRECTIONRIGHT-HAND ALL ENDS
CONNECTION STYLEPLAIN (PIPE) FIRST END
END ITEM IDENTIFICATIONLOS ANGELES CLASS SSN(688)
MEDIA FOR WHICH DESIGNEDAIR SINGLE RESPONSE
OPERATING PRESSURE50.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
THREAD SERIES DESIGNATORNPT ALL ENDS
CONNECTION TYPETHREADED EXTERNAL PIPE ALL ENDS
FLOW CONTROL DEVICEDISK
NOMINAL THREAD SIZE0.500 INCHES SECOND END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
200137Interchangeable
interchangeable cross-reference
interchangeable
5171097Interchangeable
interchangeable cross-reference
interchangeable
13337Interchangeable
interchangeable cross-reference
interchangeable
GGG-D-751Interchangeable
interchangeable cross-reference
interchangeable
44107Interchangeable
interchangeable cross-reference
interchangeable
D42UU-09H-1/2-3/4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is D42UU-03 1/2 X 3/4 IN.?
D42UU-03 1/2 X 3/4 IN. is a D42UU-03 1/2 X 3/4 IN..
What parts can replace D42UU-03 1/2 X 3/4 IN.?
There are 17 known substitutes for D42UU-03 1/2 X 3/4 IN.: 200137, 5171097, 13337 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for D42UU-03 1/2 X 3/4 IN.?
D42UU-03 1/2 X 3/4 IN. is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-052-3975. 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