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Technical Data Sheet
PartsTable / COMPONENT / S8-1/2IN
S8-1/2IN ✓ 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 S8-1/2IN 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 4820-01-355-0374, 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
S8-1/2IN
NSN: 4820-01-355-0374
FSC: 4820
CAGE: 79227 — WATTS REGULATOR COMPANY (USA)
SPECIFICATIONS
Part NumberS8-1/2IN
NSN4820-01-355-0374
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: S8-1/2IN · 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
•
THREAD QUANTITY PER INCH: 11-1/2 SECOND END
•
CONNECTION TYPE: THREADED INTERNAL HOSE SECOND END
•
STYLE DESIGNATOR: STRAIGHT THRU
•
CONNECTION STYLE: PLAIN (HOSE) FIRST END
•
MOUNTING POSITION: HORIZONTAL OR VERTICAL
•
NOMINAL THREAD SIZE: 0.500 INCHES SECOND END IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALCOPPER ALLOY BODY
THREAD QUANTITY PER INCH11-1/2 SECOND END
CONNECTION TYPETHREADED INTERNAL HOSE SECOND END
CONNECTION TYPETHREADED EXTERNAL HOSE FIRST END
STYLE DESIGNATORSTRAIGHT THRU
CONNECTION STYLEPLAIN (HOSE) FIRST END
MOUNTING POSITIONHORIZONTAL OR VERTICAL
NOMINAL THREAD SIZE0.500 INCHES SECOND END IN
VALVE OPERATION METHODAUTOMATIC
THREAD SERIES DESIGNATORNH SECOND END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
177039-65Interchangeable
interchangeable cross-reference
interchangeable
F12Interchangeable
interchangeable cross-reference
interchangeable
F12X1Interchangeable
interchangeable cross-reference
interchangeable
G322-050-011Interchangeable
interchangeable cross-reference
interchangeable
S8Interchangeable
interchangeable cross-reference
interchangeable
155971G1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is S8-1/2IN?
S8-1/2IN is a S8-1/2IN.
What parts can replace S8-1/2IN?
There are 19 known substitutes for S8-1/2IN: 177039-65, F12, F12X1 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for S8-1/2IN?
S8-1/2IN is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-355-0374. 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