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287287 — LENS BLANK,OPHTHALMIC,MULTIFOCAL

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

287287: LENS BLANK,OPHTHALMIC,MULTIFOCAL.

LENS BLANK,OPHTHALMIC,MULTIFOCAL. Key specifications include end_item_identification: 6540-01-604-9603 OPHTHALMIC LENS FABRICATION SYSTEM, part_name_assigned_by_controlling_agency: LENS MULTIFOCAL 75MM FT28 4 BASE 2.25 ADD LEFT MM. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-065-2588, 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
287287
NSN: 4820-01-065-2588
NIINs: 010652588, 016144107
FSC: 4820 — Valves, Nonpowered
CAGE: 14894 — ALLIED AUTOMOTIVE ALLIED AFTERMARKET DIV (USA)
SPECIFICATIONS
special_featuresMULTIFOCAL LENS 75 MM FT28 4 BASE 2.25 ADD LEFT; FOR USE WITH END ITEM NSN 6540-01-604-9603 MULTIVISION FABRICATION SYSTEM MM
end_item_identification6540-01-604-9603 OPHTHALMIC LENS FABRICATION SYSTEM
part_name_assigned_by_controlling_agencyLENS MULTIFOCAL 75MM FT28 4 BASE 2.25 ADD LEFT MM
NSN4820-01-065-2588
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 287287 · 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
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FLOW CONTROL DEVICE: PISTON
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CONNECTION STYLE: PLAIN,OPTIONAL END(PIPE) ALL ENDS
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CONNECTION TYPE: THREADED INTERNAL PIPE ALL ENDS
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STYLE DESIGNATOR: ANGLE
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THREAD DIRECTION: RIGHT-HAND ALL ENDS
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NOMINAL THREAD SIZE: 0.375 INCHES ALL ENDS IN
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MOUNTING FACILITY: THREADED FASTENER
TECHNICAL CHARACTERISTICS
FLOW CONTROL DEVICEPISTON
CONNECTION STYLEPLAIN,OPTIONAL END(PIPE) ALL ENDS
CONNECTION TYPETHREADED INTERNAL PIPE ALL ENDS
STYLE DESIGNATORANGLE
THREAD DIRECTIONRIGHT-HAND ALL ENDS
NOMINAL THREAD SIZE0.375 INCHES ALL ENDS IN
MOUNTING FACILITYTHREADED FASTENER
SPECIAL FEATURESW/STOPLIGT SWITCH
MATERIALSTEEL BODY
THREAD SERIES DESIGNATORNPT ALL ENDS
SUBSTITUTES & CROSS-REFERENCES 1
459561C91Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 287287?
287287 is a LENS BLANK,OPHTHALMIC,MULTIFOCAL.
What parts can replace 287287?
There is 1 known substitute for 287287: 459561C91. Substitute compatibility should be verified for your specific system.
What is the NSN for 287287?
287287 is cataloged in the U.S. Government catalog under NSN 4820-01-065-2588. 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.