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85985K18 — PLUG,PROTECTIVE,DUST AND MOISTUR

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

85985K18: PLUG,PROTECTIVE,DUST AND MOISTUR.

PLUG,PROTECTIVE,DUST AND MOISTUR. Key specifications include material: PLASTIC, design_type: FRICTION, overall_diameter: 0.719 INCHES NOMINAL IN, special_features: BLACK UNVENTED LOCKING PLUG, end_item_identification: B-1, part_name_assigned_by_controlling_agency: PUSH-IN ROUND PLASTIC PLUG. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-626-9217, 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
85985K18
NSN: 5340-01-626-9217
FSC: 5340 — Hardware, Commercial
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialPLASTIC
design_typeFRICTION
overall_diameter0.719 INCHES NOMINAL IN
special_featuresBLACK UNVENTED LOCKING PLUG
end_item_identificationB-1
part_name_assigned_by_controlling_agencyPUSH-IN ROUND PLASTIC PLUG
tube_outside_diameter_for_which_designed0.719 INCHES NOMINAL IN
opening_inside_diameter_for_which_designed0.625 INCHES NOMINAL IN
connector_nominal_thread_size_for_which_designed0.625 INCHES IN
NSN5340-01-626-9217
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 85985K18 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
DESIGN TYPE: FRICTION
•
OVERALL DIAMETER: 0.719 INCHES NOMINAL IN
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 0.719 INCHES NOMINAL IN
•
CONNECTOR NOMINAL THREAD SIZE FOR WHICH DESIGNED: 0.625 INCHES IN
•
OPENING INSIDE DIAMETER FOR WHICH DESIGNED: 0.625 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
OVERALL DIAMETER0.719 INCHES NOMINAL IN
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED0.719 INCHES NOMINAL IN
CONNECTOR NOMINAL THREAD SIZE FOR WHICH DESIGNED0.625 INCHES IN
OPENING INSIDE DIAMETER FOR WHICH DESIGNED0.625 INCHES NOMINAL IN
SPECIAL FEATURESBLACK UNVENTED LOCKING PLUG
PART NAME ASSIGNED BY CONTROLLING AGENCYPUSH-IN ROUND PLASTIC PLUG
END ITEM IDENTIFICATIONB-1
MATERIALPLASTIC
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 1
62MP0625Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
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 85985K18?
85985K18 is a PLUG,PROTECTIVE,DUST AND MOISTUR.
What parts can replace 85985K18?
There is 1 known substitute for 85985K18: 62MP0625. Substitute compatibility should be verified for your specific system.
What is the NSN for 85985K18?
85985K18 is cataloged in the U.S. Government catalog under NSN 5340-01-626-9217. 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.