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Technical Data Sheet
PartsTable / COMPONENT / B319Y-1/2IN
B319Y-1/2IN ✓ 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 B319Y-1/2IN is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-689-6743, 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
B319Y-1/2IN
NSN: 4820-00-689-6743
FSC: 4820
CAGE: 82666 — STOCKHAM VALVES AND FITTINGS INC (USA)
SPECIFICATIONS
Part NumberB319Y-1/2IN
NSN4820-00-689-6743
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: B319Y-1/2IN · 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: COPPER ALLOY FLOW CONTROL DEVICE
•
VALVE OPERATION METHOD: AUTOMATIC
•
MAXIMUM OPERATING TEMP: 400.0 FAHRENHEIT FIRST RESPONSE DEGF
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-C-390,ALLOY D5/D/ FED SPEC SINGLE MATERIAL RESPONSE SEAT
•
STYLE DESIGNATOR: STRAIGHT THRU
•
CONNECTION TYPE: THREADED INTERNAL PIPE ALL ENDS
•
CONNECTION STYLE: PLAIN, OPTIONAL END (PIPE) ALL ENDS
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALCOPPER ALLOY FLOW CONTROL DEVICE
VALVE OPERATION METHODAUTOMATIC
MAXIMUM OPERATING TEMP400.0 FAHRENHEIT FIRST RESPONSE DEGF
MATERIALCOPPER ALLOY 836 BODY
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-C-390,ALLOY D5/D/ FED SPEC SINGLE MATERIAL RESPONSE SEAT
STYLE DESIGNATORSTRAIGHT THRU
CONNECTION TYPETHREADED INTERNAL PIPE ALL ENDS
CONNECTION STYLEPLAIN, OPTIONAL END (PIPE) ALL ENDS
OPERATING PRESSURE125.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS
NOMINAL THREAD SIZE0.500 INCHES ALL ENDS IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
C25A10Interchangeable
interchangeable cross-reference
interchangeable
B305B1-1/4INInterchangeable
interchangeable cross-reference
interchangeable
103-1-1-4Interchangeable
interchangeable cross-reference
interchangeable
461JInterchangeable
interchangeable cross-reference
interchangeable
IB940 SIZE 2 INInterchangeable
interchangeable cross-reference
interchangeable
37-2INInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B319Y-1/2IN?
B319Y-1/2IN is a B319Y-1/2IN.
What parts can replace B319Y-1/2IN?
There are 25 known substitutes for B319Y-1/2IN: C25A10, B305B1-1/4IN, 103-1-1-4 and 22 more. Substitute compatibility should be verified for your specific system.
Is B319Y-1/2IN still available?
B319Y-1/2IN is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026