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1889758 — LOCKING DEVICE,SPECIAL

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

1889758: LOCKING DEVICE,SPECIAL.

The LOCKING DEVICE,SPECIAL is a the manufacturer industrial component. Key specifications include overall_width: 0.5 INCHES NOMINAL IN, overall_height: 1.87 INCHES NOMINAL IN, overall_length: 4.43 INCHES NOMINAL IN, overall_diameter: 1.03 INCHES NOMINAL IN, unthreaded_mounting_hole_diameter: 0.28 INCHES NOMINAL IN, part_name_assigned_by_controlling_agency: DEVICE, LOCKING. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-415-7928, 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
1889758
NSN: 4820-01-415-7928
NIINs: 014157928, 014164050, 014164055, 014180975, 014184030, 014185162, 015047423, 015090768, 015090770, 015416160, 017282666, 017282993
FSC: 4820 — Valves, Nonpowered
CAGE: 80064 — NAVAL SHIP SYSTEMS COMMAND (USA)
SPECIFICATIONS
overall_width0.5 INCHES NOMINAL IN
overall_height1.87 INCHES NOMINAL IN
overall_length4.43 INCHES NOMINAL IN
overall_diameter1.03 INCHES NOMINAL IN
unthreaded_mounting_hole_diameter0.28 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencyDEVICE, LOCKING
NSN4820-01-415-7928
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 1889758 · 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
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: BRAIDED 0.125 IN.DIA; LOCKED OPEN IN
•
MATERIAL: NICKEL ALLOY
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONBRAIDED 0.125 IN.DIA; LOCKED OPEN IN
END ITEM IDENTIFICATIONSEAWOLF CLASS SSN
MATERIALNICKEL ALLOY
SUBSTITUTES & CROSS-REFERENCES 2
2640-009Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
2640-009ASSY1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1889758?
1889758 is a LOCKING DEVICE,SPECIAL.
What parts can replace 1889758?
There are 2 known substitutes for 1889758: 2640-009, 2640-009ASSY1. Substitute compatibility should be verified for your specific system.
What is the NSN for 1889758?
1889758 is cataloged in the U.S. Government catalog under NSN 4820-01-415-7928. 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.