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550502 — WARNING ASSEMBLY,VEHICULAR

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

550502: WARNING ASSEMBLY,VEHICULAR.

The WARNING ASSEMBLY,VEHICULAR is a the manufacturer industrial component. Key specifications include special_features: 9.720 IN. L X 3.850 IN.

W X 1.490 IN. DP IN, end_item_identification: 2320-01-272-5029,WEAPONS SYSTEM CODE,WF,TRUCK,LINE HAUL TRACTOR (M915 SERIES). This part is cataloged in the U.S.

Government catalog under NSN 4820-00-058-6536, 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
550502
NSN: 4820-00-058-6536
NIINs: 000586536, 008747037, 014354231
FSC: 4820 — Valves, Nonpowered
CAGE: 11247 — LODESTONE CORP DIV OF FEDDERS CORP (USA)
SPECIFICATIONS
special_features9.720 IN. L X 3.850 IN. W X 1.490 IN. DP IN
end_item_identification2320-01-272-5029,WEAPONS SYSTEM CODE,WF,TRUCK,LINE HAUL TRACTOR (M915 SERIES)
NSN4820-00-058-6536
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 550502 · 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
•
FLOW CONTROL DEVICE: DISK
•
STYLE DESIGNATOR: ANGLE
•
BONNET TYPE: INSIDE SPRING
•
DISK LOADING METHOD: SPRING
•
BONNET ATTACHMENT METHOD: INTEGRAL
•
VALVE OPERATION METHOD: AUTOMATIC
TECHNICAL CHARACTERISTICS
FLOW CONTROL DEVICEDISK
STYLE DESIGNATORANGLE
BONNET TYPEINSIDE SPRING
DISK LOADING METHODSPRING
BONNET ATTACHMENT METHODINTEGRAL
VALVE OPERATION METHODAUTOMATIC
SUBSTITUTES & CROSS-REFERENCES 2
S1139AReference document
Same NSN cross-reference
Reference document — Design control — primary reference
MK1534Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 550502?
550502 is a WARNING ASSEMBLY,VEHICULAR.
What parts can replace 550502?
There are 2 known substitutes for 550502: S1139A, MK1534. Substitute compatibility should be verified for your specific system.
What is the NSN for 550502?
550502 is cataloged in the U.S. Government catalog under NSN 4820-00-058-6536. 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.