PartsTable
Technical Data Sheet
21025579 ✓ 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 HOSE ASSEMBLY,NONMETALLIC is a the manufacturer industrial component. Key specifications include seat_angle: 37.0 DEGREES FIRST END, connection_type: THREADED INTERNAL TUBE FIRST END, inside_diameter: 0.375 INCHES NOMINAL IN, connection_style: SWIVEL NUT FLARE FIRST END, outside_diameter: 0.688 INCHES NOMINAL IN, thread_direction: RIGHT-HAND FIRST END. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4810-01-526-1528, 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
21025579
NSN: 4810-01-526-1528
FSC: 4810
CAGE: 02250 — CURTISS-WRIGHT CONTROLS INTEGRATED SENSING, INC. (USA)
SPECIFICATIONS
seat_angle37.0 DEGREES FIRST END
connection_typeTHREADED INTERNAL TUBE FIRST END
inside_diameter0.375 INCHES NOMINAL IN
connection_styleSWIVEL NUT FLARE FIRST END
outside_diameter0.688 INCHES NOMINAL IN
thread_directionRIGHT-HAND FIRST END
nominal_thread_size0.500 INCHES FIRST END IN
end_connection_designSTRAIGHT FIRST END
inside_surface_conditionSMOOTH
media_for_which_designedFUEL/OIL, HYDROCARBON SINGLE RESPONSE
thread_quantity_per_inch11-1/2 FIRST END
thread_series_designatorNH FIRST END
NSN4810-01-526-1528
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: 21025579 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
40631Interchangeable
interchangeable cross-reference
interchangeable
81339Interchangeable
interchangeable cross-reference
interchangeable
361450Interchangeable
interchangeable cross-reference
interchangeable
89503Interchangeable
interchangeable cross-reference
interchangeable
813391Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21025579?
21025579 is a HOSE ASSEMBLY,NONMETALLIC.
What parts can replace 21025579?
There are 5 known substitutes for 21025579: 40631, 81339, 361450 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21025579?
21025579 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4810-01-526-1528. This indicates validated use in U.S. government and defense supply chains.
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