Value Collection ITRS-7-1H-BKN Tapered Rubber Stopper 15pk

Product Description

The VALUE COLLECTION ITRS-7-1H-BKN is a size 7 tapered rubber stopper with a center hole, sold in a 15-piece pack. The stopper features a small end diameter of 1-3/16 inches and a large end diameter of 1-29/64 inches, with a hole diameter of 13/64 inches running through the center. Hardness is rated between 38 and 48 Shore A durometer, providing a firm yet compressible seal. The black rubber construction and tapered profile make this stopper well suited for plugging, sealing, or routing tubing or rods through openings in laboratory, industrial, and HVAC service applications. Licensed technicians and maintenance professionals are the typical end users.

This stopper is used wherever a tapered rubber plug with a through-hole is needed to seal flasks, pipes, tanks, or test ports while allowing passage of a probe, tube, or wire. The 13/64-inch hole accommodates small-diameter tubing or instrumentation leads. The 38-48 Shore A hardness range means the stopper compresses enough to seal against irregular surfaces without requiring excessive force. Typical applications include laboratory setups, chemical containment, HVAC drain and test port sealing, and general-purpose plumbing or industrial maintenance tasks.

Key Features

• Size 7 tapered profile with 1-3/16 inch small end and 1-29/64 inch large end diameter
• 13/64 inch center hole for routing tubing, probes, or instrumentation leads
• 38-48 Shore A durometer provides firm, compressible seal on varied surfaces
• Black rubber construction resists compression set in typical service conditions
• 0.453 inch projection (neck size 1) for controlled insertion depth
• Sold in a 15-piece pack with a minimum order quantity of 1

Compatibility

Designed as a general-purpose size 7 tapered rubber stopper suitable for standard laboratory glassware, drain ports, test fittings, and industrial openings requiring a tapered rubber plug with a through-hole passage.

Installation Notes

Insert the stopper tapered-end first into the target opening and press firmly until the shoulder seats against the surface. Ensure the mating surface is clean and free of oils or debris that could prevent a proper seal. For HVAC or plumbing service applications, depressurize and isolate the line or port before installing or removing the stopper. Do not exceed the stopper size rating or force the plug into an undersized opening, as this can deform the rubber and compromise the seal.