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Technical Data Sheet
PartsTable / COMPONENT / 1977 3/4 IN MC
1977 3/4 IN MC ✓ 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 1977 3/4 IN MC 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 4820-00-273-9888, 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
1977 3/4 IN MC
NSN: 4820-00-273-9888
FSC: 4820
CAGE: 71342 — IMI CASH VALVE INC (USA)
SPECIFICATIONS
Part Number1977 3/4 IN MC
NSN4820-00-273-9888
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 1977 3/4 IN MC · 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
•
CONNECTION STYLE: PLAIN (PIPE) SECOND END
•
CONNECTION TYPE: THREADED INTERNAL PIPE FIRST END
•
MATERIAL: COPPER ALLOY BODY
•
THREAD SERIES DESIGNATOR: NPT FIRST END
•
BONNET TYPE: INSIDE SCREW
•
DISK LOADING METHOD: SPRING
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION STYLEPLAIN (PIPE) SECOND END
CONNECTION TYPETHREADED INTERNAL PIPE FIRST END
MATERIALCOPPER ALLOY BODY
THREAD SERIES DESIGNATORNPT FIRST END
CONNECTION STYLEPLAIN,OPTIONAL END(PIPE) FIRST END
MATERIALCOPPER ALLOY SEAT
BONNET TYPEINSIDE SCREW
DISK LOADING METHODSPRING
STYLE DESIGNATORANGLE
NOMINAL THREAD SIZE0.750 INCHES FIRST END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
100-4Interchangeable
interchangeable cross-reference
interchangeable
MC6VACInterchangeable
interchangeable cross-reference
interchangeable
MCInterchangeable
interchangeable cross-reference
interchangeable
474403PG925PC24Interchangeable
interchangeable cross-reference
interchangeable
145625Interchangeable
interchangeable cross-reference
interchangeable
733492Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1977 3/4 IN MC?
1977 3/4 IN MC is a 1977 3/4 IN MC.
What parts can replace 1977 3/4 IN MC?
There are 18 known substitutes for 1977 3/4 IN MC: 100-4, MC6VAC, MC and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1977 3/4 IN MC?
1977 3/4 IN MC is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-273-9888. 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