A capsule (obround or slot) gasket has straight sides and two semicircular ends — the shape for slotted ports, handholds, and elongated covers. We laser-cut custom capsule gaskets to your exact length and width, no minimum order, shipped within one business day. Dimensions You Enter for a Capsule / Slot Gasket Overall length End to end, including the rounded ends Width The straight-side width / diameter of the ends Thickness 1/16", 1/8", 3/16", or 1/4" Material Any elastomer or fiber Available in every material we stock — neoprene, silicone, EPDM, Buna-N, Viton, PTFE, cork, and fiber. Additional specs on request. Common Capsule / Slot Gasket Applications Slotted port and handhold covers Elongated access-hatch seals Boiler and tank handhole gaskets Oval-style inspection covers Cable-entry and gland plates Capsule / Slot Gasket FAQs What is a capsule or slot gasket?A capsule gasket — also called obround or stadium-shaped — has two parallel straight sides and semicircular ends. It seals elongated slotted openings and handholds.How do I specify a capsule gasket?Enter the overall length (end to end) and the width. We cut the obround shape to those exact dimensions in your chosen material. Enter your dimensions in the quote tool above for an instant price on custom capsule / slot gaskets from Fastest Gaskets — no minimum order, ships in one business day. {"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"What is a capsule or slot gasket?","acceptedAnswer":{"@type":"Answer","text":"A capsule gasket — also called obround or stadium-shaped — has two parallel straight sides and semicircular ends. It seals elongated slotted openings and handholds."}},{"@type":"Question","name":"How do I specify a capsule gasket?","acceptedAnswer":{"@type":"Answer","text":"Enter the overall length (end to end) and the width. We cut the obround shape to those exact dimensions in your chosen material."}}]}. Large orders may take longer.
