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Technical Data Sheet
PartsTable / COMPONENT / 1889587
1889587 ✓ 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 LOCKNUT,TUBE FITTING is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY SEAT, end_item_identification: MOORED TRAINING SHIP. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-261-9687, 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
1889587
NSN: 4820-00-261-9687
FSC: 4820
CAGE: 80064 — NAVAL SHIP SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialNICKEL ALLOY SEAT
end_item_identificationMOORED TRAINING SHIP
NSN4820-00-261-9687
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 1889587 · 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
•
SEAT ANGLE: 30.0 DEGREES NOMINAL
•
FLANGE SEAT TO DISK END HEIGHT: 0.655 INCHES NOMINAL IN
•
UNDER FLANGE HEIGHT: 0.500 INCHES NOMINAL IN
•
SHANK DIAMETER: 0.500 INCHES NOMINAL IN
•
TIP DIAMETER: 1.000 INCHES NOMINAL IN
•
MATERIAL: NICKEL ALLOY
TECHNICAL CHARACTERISTICS (FLIS)
SEAT ANGLE30.0 DEGREES NOMINAL
SPECIAL FEATURESBOTTOM GUIDED
FLANGE SEAT TO DISK END HEIGHT0.655 INCHES NOMINAL IN
UNDER FLANGE HEIGHT0.500 INCHES NOMINAL IN
SHANK DIAMETER0.500 INCHES NOMINAL IN
TIP DIAMETER1.000 INCHES NOMINAL IN
OVERALL HEIGHT1.438 INCHES NOMINAL IN
MATERIALNICKEL ALLOY
STYLE DESIGNATORPOPPET
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
2586010Interchangeable
interchangeable cross-reference
interchangeable
10387649Interchangeable
interchangeable cross-reference
interchangeable
302352Interchangeable
interchangeable cross-reference
interchangeable
803-2177934-X53X-9-12-14-15Interchangeable
interchangeable cross-reference
interchangeable
1889587Interchangeable
interchangeable cross-reference
interchangeable
11-03-9044Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1889587?
1889587 is a LOCKNUT,TUBE FITTING.
What parts can replace 1889587?
There are 15 known substitutes for 1889587: 2586010, 10387649, 302352 and 12 more. Substitute compatibility should be verified for your specific system.
Is 1889587 still available?
1889587 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