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51434B — VALVE,Y

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

51434B: VALVE,Y.

The VALVE,Y is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bonnet_type: PACKING RETAINING, thread_class: 3A ALL ENDS A, connection_type: THREADED EXTERNAL TUBE ALL ENDS, connection_style: PLAIN (TUBE) ALL ENDS, style_designator: STRAIGHT THRU Y-PATTERN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-596-3645, 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
51434B
NSN: 4820-00-596-3645
FSC: 4820 — Valves, Nonpowered
CAGE: 05073 — BABCOCK & WILCOX CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bonnet_typePACKING RETAINING
thread_class3A ALL ENDS A
connection_typeTHREADED EXTERNAL TUBE ALL ENDS
connection_stylePLAIN (TUBE) ALL ENDS
style_designatorSTRAIGHT THRU Y-PATTERN
thread_directionRIGHT-HAND ALL ENDS
flow_control_deviceSTEM
nominal_thread_size1.062 INCHES ALL ENDS IN
valve_operation_methodMANUAL
thread_quantity_per_inch10 ALL ENDS
thread_series_designatorUNS ALL ENDS
NSN4820-00-596-3645
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 51434B · 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
•
FLOW CONTROL DEVICE: STEM
•
CONNECTION STYLE: PLAIN (TUBE) ALL ENDS
•
CONNECTION TYPE: THREADED EXTERNAL TUBE ALL ENDS
•
STYLE DESIGNATOR: STRAIGHT THRU Y-PATTERN
•
BONNET TYPE: PACKING RETAINING
•
THREAD DIRECTION: RIGHT-HAND ALL ENDS
•
NOMINAL THREAD SIZE: 1.062 INCHES ALL ENDS IN
•
THREAD CLASS: 3A ALL ENDS A
TECHNICAL CHARACTERISTICS
FLOW CONTROL DEVICESTEM
CONNECTION STYLEPLAIN (TUBE) ALL ENDS
CONNECTION TYPETHREADED EXTERNAL TUBE ALL ENDS
STYLE DESIGNATORSTRAIGHT THRU Y-PATTERN
BONNET TYPEPACKING RETAINING
THREAD DIRECTIONRIGHT-HAND ALL ENDS
NOMINAL THREAD SIZE1.062 INCHES ALL ENDS IN
THREAD CLASS3A ALL ENDS A
THREAD QUANTITY PER INCH10 ALL ENDS
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 2
117491EPC4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
7800158Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 51434B?
51434B is a VALVE,Y.
What parts can replace 51434B?
There are 2 known substitutes for 51434B: 117491EPC4, 7800158. Substitute compatibility should be verified for your specific system.
What is the NSN for 51434B?
51434B is cataloged in the U.S. Government catalog under NSN 4820-00-596-3645. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.