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PartsTable / COMPONENT / 2620-902 PC4
2620-902 PC4 ✓ 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 LOCKNUT,TUBE FITTING is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY OVERALL, thread_class: 2A SINGLE THREADED PORTION A, thread_length: 0.375 INCHES NOMINAL SINGLE THREADED PORTION IN, flange_diameter: 1.558 INCHES NOMINAL IN, style_designator: THREADED FLANGED, seat_angle_in_deg: 30.000 NOMINAL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-105-3572, 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
2620-902 PC4
NSN: 4820-01-105-3572
FSC: 4820
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
thread_class2A SINGLE THREADED PORTION A
thread_length0.375 INCHES NOMINAL SINGLE THREADED PORTION IN
flange_diameter1.558 INCHES NOMINAL IN
style_designatorTHREADED FLANGED
seat_angle_in_deg30.000 NOMINAL
nominal_thread_size1.375 INCHES SINGLE THREADED PORTION IN
under_flange_height0.375 INCHES NOMINAL IN
body_inside_diameter1.000 INCHES NOMINAL IN
seating_surface_shapeANGULAR
thread_quantity_per_inch20 SINGLE THREADED PORTION
thread_series_designatorUN SINGLE THREADED PORTION
NSN4820-01-105-3572
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 2620-902 PC4 · 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
•
THREAD LENGTH: 0.375 INCHES NOMINAL SINGLE THREADED PORTION IN
•
THREAD CLASS: 2A SINGLE THREADED PORTION A
•
THREAD QUANTITY PER INCH: 20 SINGLE THREADED PORTION
•
THREAD SERIES DESIGNATOR: UN SINGLE THREADED PORTION
•
MATERIAL: NICKEL ALLOY OVERALL
•
STYLE DESIGNATOR: THREADED FLANGED
•
SEATING SURFACE SHAPE: ANGULAR
•
BODY INSIDE DIAMETER: 1.000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD LENGTH0.375 INCHES NOMINAL SINGLE THREADED PORTION IN
THREAD CLASS2A SINGLE THREADED PORTION A
THREAD QUANTITY PER INCH20 SINGLE THREADED PORTION
THREAD SERIES DESIGNATORUN SINGLE THREADED PORTION
MATERIALNICKEL ALLOY OVERALL
STYLE DESIGNATORTHREADED FLANGED
SEATING SURFACE SHAPEANGULAR
BODY INSIDE DIAMETER1.000 INCHES NOMINAL IN
FLANGE SEAT TO DISK END HEIGHT0.175 INCHES NOMINAL IN
NOMINAL THREAD SIZE1.375 INCHES SINGLE THREADED PORTION IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
C38476Interchangeable
interchangeable cross-reference
interchangeable
SS845-1889587Interchangeable
interchangeable cross-reference
interchangeable
SC3549 3-4INInterchangeable
interchangeable cross-reference
interchangeable
2620-902 ASSY CInterchangeable
interchangeable cross-reference
interchangeable
845-1889587ASSYCFInterchangeable
interchangeable cross-reference
interchangeable
2620-902Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2620-902 PC4?
2620-902 PC4 is a LOCKNUT,TUBE FITTING.
What parts can replace 2620-902 PC4?
There are 30 known substitutes for 2620-902 PC4: C38476, SS845-1889587, SC3549 3-4IN and 27 more. Substitute compatibility should be verified for your specific system.
Is 2620-902 PC4 still available?
2620-902 PC4 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