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581985-1 — HOUSING,MECHANICAL DRIVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

581985-1: HOUSING,MECHANICAL DRIVE.

The HOUSING,MECHANICAL DRIVE is a the manufacturer industrial component. Key specifications include special_features: HOUSING,FORWARD GEAR TURBINE, end_item_identification: MK50 TORPEDO,AFTERBODY SECTION. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-055-0344, 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
581985-1
NSN: 4820-01-055-0344
NIINs: 010550344, 013268624
FSC: 4820 — Valves, Nonpowered
CAGE: 70210 — HONEYWELL INTERNATIONAL INC. DIV AEROSPACE - TORRANCE (USA)
SPECIFICATIONS
special_featuresHOUSING,FORWARD GEAR TURBINE
end_item_identificationMK50 TORPEDO,AFTERBODY SECTION
NSN4820-01-055-0344
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 581985-1 · 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: 1.000 IN. HEX BAR,CRES QQ-5-763 CLASS 347 COND A MATERIAL IN
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTION1.000 IN. HEX BAR,CRES QQ-5-763 CLASS 347 COND A MATERIAL IN
SUBSTITUTES & CROSS-REFERENCES 1
4820PL0655443Reference document
Same NSN cross-reference
Reference document — Informative reference only
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 581985-1?
581985-1 is a HOUSING,MECHANICAL DRIVE.
What parts can replace 581985-1?
There is 1 known substitute for 581985-1: 4820PL0655443. Substitute compatibility should be verified for your specific system.
What is the NSN for 581985-1?
581985-1 is cataloged in the U.S. Government catalog under NSN 4820-01-055-0344. 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.