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3A11621 — BY-PASS RETAINING RING

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

3A11621: BY-PASS RETAINING RING.

The BY-PASS RETAINING RING is a the manufacturer industrial component. Key specifications include bonnet_type: EXPOSED SPRING, disk_loading_method: SPRING, valve_operation_method: AUTOMATIC, end_item_identification: LINK-BELT CONTROL VALVE 28A3316, bonnet_attachment_method: PRESSURE SEAL, RING TYPE, renewable_seat_ring_type: PRESSED-IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-331-0536, 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
3A11621
NSN: 4820-01-331-0536
FSC: 4820 — Valves, Nonpowered
CAGE: 2Y614 — LINK-BELT CRANES, L.P., LLLP (USA)
SPECIFICATIONS
bonnet_typeEXPOSED SPRING
disk_loading_methodSPRING
valve_operation_methodAUTOMATIC
end_item_identificationLINK-BELT CONTROL VALVE 28A3316
bonnet_attachment_methodPRESSURE SEAL, RING TYPE
renewable_seat_ring_typePRESSED-IN
furnished_items_and_quantity1 GASKET
NSN4820-01-331-0536
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 3A11621 · 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
•
FURNISHED ITEMS AND QUANTITY: 1 GASKET
•
RENEWABLE SEAT RING TYPE: PRESSED-IN
•
BONNET TYPE: EXPOSED SPRING
•
DISK LOADING METHOD: SPRING
•
BONNET ATTACHMENT METHOD: PRESSURE SEAL, RING TYPE
•
VALVE OPERATION METHOD: AUTOMATIC
TECHNICAL CHARACTERISTICS
FURNISHED ITEMS AND QUANTITY1 GASKET
RENEWABLE SEAT RING TYPEPRESSED-IN
BONNET TYPEEXPOSED SPRING
DISK LOADING METHODSPRING
BONNET ATTACHMENT METHODPRESSURE SEAL, RING TYPE
END ITEM IDENTIFICATIONLINK-BELT CONTROL VALVE 28A3316
VALVE OPERATION METHODAUTOMATIC
SUBSTITUTES & CROSS-REFERENCES 2
K-2029-AReference document
Same NSN cross-reference
Reference document — Secondary reference
12759001Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3A11621?
3A11621 is a BY-PASS RETAINING RING.
What parts can replace 3A11621?
There are 2 known substitutes for 3A11621: K-2029-A, 12759001. Substitute compatibility should be verified for your specific system.
What is the NSN for 3A11621?
3A11621 is cataloged in the U.S. Government catalog under NSN 4820-01-331-0536. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.