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PartsTable / COMPONENT / 4SC1045
4SC1045 ✓ 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 SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, thread_class: 3A SINGLE THREADED PORTION A, thread_length: 0.225 INCHES NOMINAL SINGLE THREADED PORTION IN, flange_diameter: 0.860 INCHES NOMINAL IN, special_features: FLANGED PORTION HAS HEX WRENCHING FEATURE 0.758 IN. ACROSS FLATS IN, style_designator: THREADED FLANGED.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-852-3707, 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
4SC1045
NSN: 4820-00-852-3707
FSC: 4820
CAGE: 57217 — STRIEGEL SUPPLY, INC. DBA STRIEGEL SUPPLY INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
thread_class3A SINGLE THREADED PORTION A
thread_length0.225 INCHES NOMINAL SINGLE THREADED PORTION IN
flange_diameter0.860 INCHES NOMINAL IN
special_featuresFLANGED PORTION HAS HEX WRENCHING FEATURE 0.758 IN. ACROSS FLATS IN
style_designatorTHREADED FLANGED
nominal_thread_size0.688 INCHES SINGLE THREADED PORTION IN
under_flange_height0.356 INCHES NOMINAL IN
body_inside_diameter0.500 INCHES NOMINAL IN
fsc_application_dataCOMPRESSOR,RECIPROCATING
seating_surface_shapeFLAT
thread_quantity_per_inch16 SINGLE THREADED PORTION
NSN4820-00-852-3707
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 4SC1045 · 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
•
UNDER FLANGE HEIGHT: 0.356 INCHES NOMINAL IN
•
MATERIAL: COPPER ALLOY OVERALL
•
FLANGE DIAMETER: 0.860 INCHES NOMINAL IN
•
THREAD SERIES DESIGNATOR: UN SINGLE THREADED PORTION
•
THREAD LENGTH: 0.225 INCHES NOMINAL SINGLE THREADED PORTION IN
•
SEATING SURFACE SHAPE: FLAT
•
FLANGE SEAT TO DISK END HEIGHT: 0.190 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESFLANGED PORTION HAS HEX WRENCHING FEATURE 0.758 IN. ACROSS FLATS IN
UNDER FLANGE HEIGHT0.356 INCHES NOMINAL IN
MATERIALCOPPER ALLOY OVERALL
FLANGE DIAMETER0.860 INCHES NOMINAL IN
THREAD SERIES DESIGNATORUN SINGLE THREADED PORTION
THREAD LENGTH0.225 INCHES NOMINAL SINGLE THREADED PORTION IN
SEATING SURFACE SHAPEFLAT
FLANGE SEAT TO DISK END HEIGHT0.190 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.688 INCHES SINGLE THREADED PORTION IN
THREAD CLASS3A SINGLE THREADED PORTION A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
338Interchangeable
interchangeable cross-reference
interchangeable
V2235AInterchangeable
interchangeable cross-reference
interchangeable
932XInterchangeable
interchangeable cross-reference
interchangeable
MU149AInterchangeable
interchangeable cross-reference
interchangeable
T8673475P355Interchangeable
interchangeable cross-reference
interchangeable
4550AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4SC1045?
4SC1045 is a SEAT,VALVE.
What parts can replace 4SC1045?
There are 14 known substitutes for 4SC1045: 338, V2235A, 932X and 11 more. Substitute compatibility should be verified for your specific system.
Is 4SC1045 still available?
4SC1045 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026