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PartsTable / COMPONENT / 2620-902 ASSYC1-2INPC4
2620-902 ASSYC1-2INPC4 ✓ 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: 3A SINGLE THREADED PORTION A, thread_length: 0.222 INCHES NOMINAL SINGLE THREADED PORTION IN, flange_diameter: 0.937 INCHES NOMINAL IN, style_designator: THREADED FLANGED, seat_angle_in_deg: 15.000 NOMINAL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-073-5849, 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 ASSYC1-2INPC4
NSN: 4820-01-073-5849
FSC: 4820
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
thread_class3A SINGLE THREADED PORTION A
thread_length0.222 INCHES NOMINAL SINGLE THREADED PORTION IN
flange_diameter0.937 INCHES NOMINAL IN
style_designatorTHREADED FLANGED
seat_angle_in_deg15.000 NOMINAL
nominal_thread_size0.766 INCHES SINGLE THREADED PORTION IN
under_flange_height0.316 INCHES NOMINAL IN
body_inside_diameter0.471 INCHES NOMINAL IN
seating_surface_shapeANGULAR
thread_quantity_per_inch24 SINGLE THREADED PORTION
thread_series_designatorUNS SINGLE THREADED PORTION
NSN4820-01-073-5849
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 2620-902 ASSYC1-2INPC4 · 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: 0.316 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 0.766 INCHES SINGLE THREADED PORTION IN
•
THREAD LENGTH: 0.222 INCHES NOMINAL SINGLE THREADED PORTION IN
•
MATERIAL: NICKEL ALLOY OVERALL
•
THREAD SERIES DESIGNATOR: UNS SINGLE THREADED PORTION
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281 CLASS A FED SPEC SINGLE MATERIAL RESPONSE OR QQ-N-281 CLASS B FED SPEC SINGLE MATERIAL RESPONSE OR QQ-N-288 COMP A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
STYLE DESIGNATOR: THREADED FLANGED
•
BODY INSIDE DIAMETER: 0.471 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
UNDER FLANGE HEIGHT0.316 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.766 INCHES SINGLE THREADED PORTION IN
THREAD LENGTH0.222 INCHES NOMINAL SINGLE THREADED PORTION IN
MATERIALNICKEL ALLOY OVERALL
THREAD SERIES DESIGNATORUNS SINGLE THREADED PORTION
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 CLASS A FED SPEC SINGLE MATERIAL RESPONSE OR QQ-N-281 CLASS B FED SPEC SINGLE MATERIAL RESPONSE OR QQ-N-288 COMP A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
STYLE DESIGNATORTHREADED FLANGED
BODY INSIDE DIAMETER0.471 INCHES NOMINAL IN
SEATING SURFACE SHAPEANGULAR
THREAD QUANTITY PER INCH24 SINGLE THREADED PORTION
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
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 ASSYC1-2INPC4?
2620-902 ASSYC1-2INPC4 is a LOCKNUT,TUBE FITTING.
What parts can replace 2620-902 ASSYC1-2INPC4?
There are 26 known substitutes for 2620-902 ASSYC1-2INPC4: C38476, SS845-1889587, SC3549 3-4IN and 23 more. Substitute compatibility should be verified for your specific system.
Is 2620-902 ASSYC1-2INPC4 still available?
2620-902 ASSYC1-2INPC4 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