Global O-Ring and Seal, LLC - What's square, round, and a superb seal at the same time? Square Rings! Square Rings fit in o-ring grooves and are interchangeable size-for-size. We keep Square
Static seals - dual seal, fluid connector seal, square ring, flange seal, bonded seal, facial seal - FRANCE JOINT
OSK™ SAE Flange Seal Kit in Square Buna-N 70 45pc [K45X6SN70-FLANGE] : The O-Ring Store LLC, We make getting O-Rings easy!
AS568-166 SN70 (NBR) Buna-N 70 Duro Square O-Ring [SN70166] : The O-Ring Store LLC, We make getting O-Rings easy!
580-273 - Hercules for o-rings, hydraulic seals, cylinders
O-rings and back-up rings | SKF
Hayward SX244Z1 Replacement Part Square Seal Bulkhead O-Ring for Pool Filter - Walmart.com