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Technical Data Sheet
PartsTable / COMPONENT / 3 1/2G
3 1/2G ✓ Verified by PartsTable
— · GATE VALVE
WHAT YOU NEED TO KNOW
Full open or full close only — never throttle Rising stem shows position visually
Throttling a gate valve erodes seats
PRODUCT OVERVIEW

The 3 1/2G is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-117-0779, 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
3 1/2G
NSN: 4820-01-117-0779
FSC: 4820
CAGE: 18163 — EATON CORP CONTROLS DIV (USA)
SPECIFICATIONS
Part Number3 1/2G
NSN4820-01-117-0779
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 3 1/2G · 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
•
REGULATION TYPE: AUTOMATIC SINGLE STAGE
•
MATERIAL: RUBBER FLOW CONTROL DEVICE
•
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 0.500-14 NPT FIRST END
•
SURFACE TREATMENT: CHROMIUM OUTSIDE
•
MEDIA FOR WHICH DESIGNED: WATER
•
BODY STYLE: STRAIGHT THRU
•
FIRST END STYLE DESIGNATOR: PLAIN
TECHNICAL CHARACTERISTICS (FLIS)
REGULATION TYPEAUTOMATIC SINGLE STAGE
MATERIALRUBBER FLOW CONTROL DEVICE
MATERIALCOPPER ALLOY BODY
THREAD SIZE AND SERIES/TYPE DESIGNATOR0.500-14 NPT FIRST END
SURFACE TREATMENTCHROMIUM OUTSIDE
MEDIA FOR WHICH DESIGNEDWATER
BODY STYLESTRAIGHT THRU
FIRST END STYLE DESIGNATORPLAIN
FIRST END CONNECTION TYPETHREADED INTERNAL PIPE
FIRST END THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
312SGInterchangeable
interchangeable cross-reference
interchangeable
81502Interchangeable
interchangeable cross-reference
interchangeable
NDC00018Interchangeable
interchangeable cross-reference
interchangeable
12 NEWCO 11F-CB2-EXT HWInterchangeable
Same NIIN cross-reference
interchangeable
95747-38Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3 1/2G?
3 1/2G is a 3 1/2G.
What parts can replace 3 1/2G?
There are 5 known substitutes for 3 1/2G: 312SG, 81502, NDC00018 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3 1/2G?
3 1/2G is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-117-0779. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026