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LD419987 — VALVE,CHECK

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

LD419987: VALVE,CHECK.

The VALVE,CHECK is a the manufacturer industrial component. Key specifications include flange_shape: RECTANGULAR WITH HOLES SECOND END, nominal_width: 2.125 INCHES SECOND END IN, connection_type: UNTHREADED INTERNAL PIPE FIRST END, style_designator: STRAIGHT THRU FLANGED ENDS, mounting_facility: BRACKET(S), flange_face_design: PLAIN SECOND END. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-830-6816, 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
LD419987
NSN: 4820-00-830-6816
FSC: 4820 — Valves, Nonpowered
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
flange_shapeRECTANGULAR WITH HOLES SECOND END
nominal_width2.125 INCHES SECOND END IN
connection_typeUNTHREADED INTERNAL PIPE FIRST END
style_designatorSTRAIGHT THRU FLANGED ENDS
mounting_facilityBRACKET(S)
flange_face_designPLAIN SECOND END
face_to_face_distance4.125 INCHES IN
valve_operation_methodAUTOMATIC
NSN4820-00-830-6816
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: LD419987 · 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
•
FLANGE SHAPE: RECTANGULAR WITH HOLES SECOND END
•
FLANGE FACE DESIGN: PLAIN SECOND END
•
CONNECTION TYPE: UNTHREADED INTERNAL PIPE FIRST END
•
STYLE DESIGNATOR: STRAIGHT THRU FLANGED ENDS
•
MOUNTING FACILITY: BRACKET(S)
•
NOMINAL WIDTH: 2.125 INCHES SECOND END IN
•
FACE TO FACE DISTANCE: 4.125 INCHES IN
TECHNICAL CHARACTERISTICS
FLANGE SHAPERECTANGULAR WITH HOLES SECOND END
FLANGE FACE DESIGNPLAIN SECOND END
CONNECTION TYPEUNTHREADED INTERNAL PIPE FIRST END
CONNECTION TYPEFLANGE SECOND END
STYLE DESIGNATORSTRAIGHT THRU FLANGED ENDS
MOUNTING FACILITYBRACKET(S)
NOMINAL WIDTH2.125 INCHES SECOND END IN
FACE TO FACE DISTANCE4.125 INCHES IN
VALVE OPERATION METHODAUTOMATIC
OTHER ITEMS IN FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097 4820-00-001-0010 4820-00-001-0020 4820-00-001-0021 4820-00-001-0032 4820-00-001-0037 4820-00-001-0042 4820-00-001-1230
SUBSTITUTES & CROSS-REFERENCES 1
4820PL0928947Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is LD419987?
LD419987 is a VALVE,CHECK.
What parts can replace LD419987?
There is 1 known substitute for LD419987: 4820PL0928947. Substitute compatibility should be verified for your specific system.
What is the NSN for LD419987?
LD419987 is cataloged in the U.S. Government catalog under NSN 4820-00-830-6816. 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.