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Technical Data Sheet
PartsTable / COMPONENT / STC530
STC530 ✓ 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 COCK,PLUG is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 377 OVERALL, flow_style: TWO-WAY TWO PORT BOTTOM OUTLET 360 DEGREE PLUG TURN, connection_type: THREADED INTERNAL PIPE ALL ENDS, operating_pressure: 30.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS, nominal_thread_size: 0.250 INCHES ALL ENDS IN, maximum_operating_temp: 250.0 FAHRENHEIT SINGLE RESPONSE DEGF. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-967-3106, 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
STC530
NSN: 4820-00-967-3106
FSC: 4820
CAGE: 81381 — STEWART & STEVENSON POWER PRODUCTS LLC (USA)
SPECIFICATIONS
materialCOPPER ALLOY 377 OVERALL
flow_styleTWO-WAY TWO PORT BOTTOM OUTLET 360 DEGREE PLUG TURN
connection_typeTHREADED INTERNAL PIPE ALL ENDS
operating_pressure30.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.250 INCHES ALL ENDS IN
maximum_operating_temp250.0 FAHRENHEIT SINGLE RESPONSE DEGF
valve_operation_methodMANUAL
thread_series_designatorNPTF ALL ENDS
NSN4820-00-967-3106
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: STC530 · 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
•
OPERATING PRESSURE: 30.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
NOMINAL THREAD SIZE: 0.250 INCHES ALL ENDS IN
•
MATERIAL: COPPER ALLOY 377 OVERALL
•
VALVE OPERATION METHOD: MANUAL
•
CONNECTION TYPE: THREADED INTERNAL PIPE ALL ENDS
•
MAXIMUM OPERATING TEMP: 250.0 FAHRENHEIT SINGLE RESPONSE DEGF
•
FLOW STYLE: TWO-WAY TWO PORT BOTTOM OUTLET 360 DEGREE PLUG TURN
•
THREAD SERIES DESIGNATOR: NPTF ALL ENDS
TECHNICAL CHARACTERISTICS (FLIS)
OPERATING PRESSURE30.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
NOMINAL THREAD SIZE0.250 INCHES ALL ENDS IN
MATERIALCOPPER ALLOY 377 OVERALL
VALVE OPERATION METHODMANUAL
CONNECTION TYPETHREADED INTERNAL PIPE ALL ENDS
MAXIMUM OPERATING TEMP250.0 FAHRENHEIT SINGLE RESPONSE DEGF
FLOW STYLETWO-WAY TWO PORT BOTTOM OUTLET 360 DEGREE PLUG TURN
THREAD SERIES DESIGNATORNPTF ALL ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
70145-1Interchangeable
interchangeable cross-reference
interchangeable
3-2210Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is STC530?
STC530 is a COCK,PLUG.
What parts can replace STC530?
There are 2 known substitutes for STC530: 70145-1, 3-2210. Substitute compatibility should be verified for your specific system.
What is the NSN for STC530?
STC530 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-967-3106. 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