There is 20 standard sizes for O-rings used to seal straight-thread tube fittings on a boss. A boss Tube fitting with boss seal is cylindrical projection on a casting or forging. The end of that projection is machined to provide a flat, smooth surface for sealing. Straight threads used with an O-ring provide a better seal than tapered threads used alone. Although made in a variety of o-ring compounds the most common Boss O-rings are Buna-N in 90 Durometer.
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AS568 O-Rings Standard InchMetric O-Rings - ISO 3601OSK™ Assorted O-Ring Kits ↪ Buna-N 70 O-Ring Kit ↪ Buna-N 90 O-Ring Kit ↪ Aflas O-Ring Kit ↪ Automotive O-Ring Kit ↪ Back-Up Ring Kit ↪ Boss O-Ring Kit ↪ Buna-N 50 O-Ring Kit ↪ Caterpillar Compatible O-Ring Kit ↪ EPDM O-Ring Kit ↪ Face Seals ↪ FDA Grade O-Ring Kits ↪ Flange Kits ↪ HNBR Green O-Ring Kit ↪ Metric O-Ring Kit ↪ Neoprene O-Ring Kit ↪ OSK™ CV75 Extreme Chemical Resistant FKM O-Ring Kits Black ↪ OSK™ FKM (Fluorocarbon) O-Ring Kits Black 90 Duro ↪ OSK™ FKM/Viton (Fluorocarbon) O-Ring Kits ↪ OSK™ Max Truck O-Ring Kits ↪ OSK™ X-Ring Kits ↪ Paintball & Air Rifle Kits ↪ Plumbing O-Ring Kit ↪ Pressure Washer Kits ↪ PTFE Temperature & Chemical Resistant O-Ring Kits ↪ Silicone O-Ring Kit ↪ Square O-Ring Kits ↪ Urethane O-Ring KitO-Ring Cord StockPrecision Spliced & Vulcanized O-RingsOlypsys® O-Ring MeasurementHydraulic Seals - InchHydraulic Seals - MetricO-Ring Glue & Thread SealantO-Ring Lubrication ProductsO-Ring Splice KitsOil Seals - Shaft SealsOSK™ Air Nailer O-Ring KitsOSK™ Hydraulic Cylinder Seal KitsOSK™ O-Ring Repair KitsOSK™ Spray Foam O-Rings for Graco® and PMCContinuously Molded O-RingsOSK™ OEM Replacement O-RingsOSK™ Custom O-Rings & KitsFeatured Products ...
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1847 Wilma Dr, Clarkston WA 99403
Phone 208-413-6377 - Fax 208-413-6719