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1889587 — LOCKNUT,TUBE FITTING

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

1889587: LOCKNUT,TUBE FITTING.

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 U.S.

Government catalog 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
NIINs: 002619687, 010227635, 011568235, 015495993
FSC: 4820 — Valves, Nonpowered
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
•
SHANK DIAMETER: 0.500 INCHES NOMINAL IN
•
FLANGE SEAT TO DISK END HEIGHT: 0.655 INCHES NOMINAL IN
•
STYLE DESIGNATOR: POPPET
•
TIP DIAMETER: 1.000 INCHES NOMINAL IN
•
SEAT ANGLE: 30.0 DEGREES NOMINAL
•
UNDER FLANGE HEIGHT: 0.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SHANK DIAMETER0.500 INCHES NOMINAL IN
FLANGE SEAT TO DISK END HEIGHT0.655 INCHES NOMINAL IN
OVERALL HEIGHT1.438 INCHES NOMINAL IN
STYLE DESIGNATORPOPPET
TIP DIAMETER1.000 INCHES NOMINAL IN
SEAT ANGLE30.0 DEGREES NOMINAL
SPECIAL FEATURESBOTTOM GUIDED
UNDER FLANGE HEIGHT0.500 INCHES NOMINAL IN
MATERIALNICKEL ALLOY
SUBSTITUTES & CROSS-REFERENCES 6
2620-902-27-1INReference document
Same NSN cross-reference
Reference document — Secondary reference
2620-902Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
845-1889587Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
2620-902ASSYBV1IN PIECE27Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
2620-902 PIECE 27 1INSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
1889587 PIECE 27 1INSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1889587?
1889587 is a LOCKNUT,TUBE FITTING.
What parts can replace 1889587?
There are 6 known substitutes for 1889587: 2620-902-27-1IN, 2620-902, 845-1889587 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1889587?
1889587 is cataloged in the U.S. Government catalog under NSN 4820-00-261-9687. 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.