PartsTable
Technical Data Sheet
Download PDF

Y303000503 — VALVE,REGULATING,FLUID PRESSURE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

Y303000503: VALVE,REGULATING,FLUID PRESSURE.

VALVE,REGULATING,FLUID PRESSURE. Key specifications include material: COPPER ALLOY BODY. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-213-1038, 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
Y303000503
NSN: 4820-01-213-1038
FSC: 4820 — Valves, Nonpowered
CAGE: 35795 — LESLIE CONTROLS, INC. DBA LESLIE CONTROLS INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY BODY
NSN4820-01-213-1038
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: Y303000503 · 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
•
MATERIAL: COPPER ALLOY BODY
TECHNICAL CHARACTERISTICS
MATERIALCOPPER ALLOY BODY
OTHER ITEMS IN FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097 4820-00-001-0010 4820-00-001-0020 4820-00-001-0021 4820-00-001-0032 4820-00-001-0037 4820-00-001-0042 4820-00-001-1230
SUBSTITUTES & CROSS-REFERENCES 2
LN-3 1.25INReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LN-3 1 1/4 INReference 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
Ready to buy Y303000503?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is Y303000503?
Y303000503 is a VALVE,REGULATING,FLUID PRESSURE.
What parts can replace Y303000503?
There are 2 known substitutes for Y303000503: LN-3 1.25IN, LN-3 1 1/4 IN. Substitute compatibility should be verified for your specific system.
What is the NSN for Y303000503?
Y303000503 is cataloged in the U.S. Government catalog under NSN 4820-01-213-1038. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — Y303000503

✓ 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.