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D50559 ITEM 7 — STEM,FLUID VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

D50559 ITEM 7: STEM,FLUID VALVE.

The STEM,FLUID VALVE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY, overall_length: 14.750 INCHES NOMINAL IN, stem_actuating_end_type: THREADED EXTERNALLY, largest_outside_diameter: 0.500 INCHES NOMINAL IN, furnished_items_and_quantity: 1 PIN, valve_size_for_which_designed: 2.500 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-258-2767, 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
D50559 ITEM 7
NSN: 4820-01-258-2767
FSC: 4820 — Valves, Nonpowered
CAGE: 34889 — HUNT VALVE COMPANY INC DBA UNION FLONETICS (USA)
SPECIFICATIONS
materialNICKEL ALLOY
overall_length14.750 INCHES NOMINAL IN
stem_actuating_end_typeTHREADED EXTERNALLY
largest_outside_diameter0.500 INCHES NOMINAL IN
furnished_items_and_quantity1 PIN
valve_size_for_which_designed2.500 INCHES IN
valve_type_for_which_designedANGLE
NSN4820-01-258-2767
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: D50559 ITEM 7 · 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
•
FURNISHED ITEMS AND QUANTITY: 1 PIN
•
VALVE TYPE FOR WHICH DESIGNED: ANGLE
•
LARGEST OUTSIDE DIAMETER: 0.500 INCHES NOMINAL IN
•
STEM ACTUATING END TYPE: THREADED EXTERNALLY
•
VALVE SIZE FOR WHICH DESIGNED: 2.500 INCHES IN
•
MATERIAL: NICKEL ALLOY
TECHNICAL CHARACTERISTICS
FURNISHED ITEMS AND QUANTITY1 PIN
VALVE TYPE FOR WHICH DESIGNEDANGLE
LARGEST OUTSIDE DIAMETER0.500 INCHES NOMINAL IN
STEM ACTUATING END TYPETHREADED EXTERNALLY
OVERALL LENGTH14.750 INCHES NOMINAL IN
VALVE SIZE FOR WHICH DESIGNED2.500 INCHES IN
MATERIALNICKEL ALLOY
SUBSTITUTES & CROSS-REFERENCES 2
B50508MFVReference document
Same NSN cross-reference
Reference document — Design control — primary reference
D50559Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 D50559 ITEM 7?
D50559 ITEM 7 is a STEM,FLUID VALVE.
What parts can replace D50559 ITEM 7?
There are 2 known substitutes for D50559 ITEM 7: B50508MFV, D50559. Substitute compatibility should be verified for your specific system.
What is the NSN for D50559 ITEM 7?
D50559 ITEM 7 is cataloged in the U.S. Government catalog under NSN 4820-01-258-2767. 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.