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RYLB166 — DIAPHRAGM,VALVE,FLAT

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

RYLB166: DIAPHRAGM,VALVE,FLAT.

The DIAPHRAGM,VALVE,FLAT is a the manufacturer industrial component. Key specifications include hole_diameter: 0.145 INCHES NOMINAL IN, outside_diameter: 1.500 INCHES NOMINAL IN, style_designator: FLAT, material_thickness: 0.020 INCHES NOMINAL IN, bolt_circle_diameter: 1.094 INCHES NOMINAL IN, end_item_identification: C17A AIRCRAFT. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-423-3388, 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
RYLB166
NSN: 4820-01-423-3388
FSC: 4820 — Valves, Nonpowered
CAGE: 05624 — GE AVIATION SYSTEMS LLC DBA GE AVIATION SYSTEMS LLC (USA)
SPECIFICATIONS
hole_diameter0.145 INCHES NOMINAL IN
outside_diameter1.500 INCHES NOMINAL IN
style_designatorFLAT
bolt_hole_quantity6
material_thickness0.020 INCHES NOMINAL IN
bolt_circle_diameter1.094 INCHES NOMINAL IN
end_item_identificationC17A AIRCRAFT
NSN4820-01-423-3388
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: RYLB166 · 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
•
OUTSIDE DIAMETER: 1.500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: FLAT
•
MATERIAL THICKNESS: 0.020 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 6
•
BOLT CIRCLE DIAMETER: 1.094 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.145 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OUTSIDE DIAMETER1.500 INCHES NOMINAL IN
STYLE DESIGNATORFLAT
MATERIAL THICKNESS0.020 INCHES NOMINAL IN
BOLT HOLE QUANTITY6
BOLT CIRCLE DIAMETER1.094 INCHES NOMINAL IN
END ITEM IDENTIFICATIONC17A AIRCRAFT
HOLE DIAMETER0.145 INCHES NOMINAL IN
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is RYLB166?
RYLB166 is a DIAPHRAGM,VALVE,FLAT.
What is the NSN for RYLB166?
RYLB166 is cataloged in the U.S. Government catalog under NSN 4820-01-423-3388. 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.