Danco 35766B Buna-n O-ring 1-5/8 X 1-3/4 in Faucet Repair

Product Description

The DANCO 35766B is a Buna-N rubber O-ring used in faucet repair and general plumbing maintenance. Measuring 1-5/8 inches by 1-3/4 inches, it provides a reliable seal in applications where water exposure and mechanical wear are ongoing concerns. Buna-N (nitrile) rubber is a standard material for plumbing O-rings because of its resistance to water swell and abrasion. The part is black in color and sold individually. Plumbers and experienced DIYers reach for this O-ring when restoring a watertight seal on leaking faucets or valves.

This O-ring is suited for residential and light commercial faucet repair work. It fits into standard O-ring grooves on faucet stems, valve bodies, and related plumbing components where a size 52 O-ring is specified. Typical install scenarios include replacing a worn or cracked seal during a dripping faucet repair or a valve rebuild. Its Buna-N composition holds up in cold and hot water lines within normal residential temperature ranges.

Key Features

• Buna-N (nitrile) rubber construction resists water swell and abrasion
• Size 52 O-ring — 1-5/8 inches inner dimension by 1-3/4 inches outer dimension
• Black color, standard for plumbing and faucet applications
• Sold individually per bag

Compatibility

Designed as an OEM-style replacement O-ring for faucets and valves requiring a size 52 Buna-N O-ring with 1-5/8 inch by 1-3/4 inch dimensions.

Installation Notes

Installation is typically performed by a licensed plumber or a knowledgeable DIYer. Shut off the water supply at the fixture stop valve or main before disassembling any faucet or valve. Inspect the O-ring groove for debris or damage before seating the new ring, and apply a light coat of plumber-grade silicone grease to help the O-ring seat evenly and extend service life. Do not use petroleum-based lubricants, as they can degrade Buna-N rubber over time.

Technical Specifications

• Material: Buna-N (Nitrile) Rubber
• Color: Black
• Inner Diameter: 1-5/8 inches
• Outer Diameter: 1-3/4 inches
• O-Ring Size: 52
• Weight: 0.001 pounds
• Sold As: Each
• UPC: 00037155357666

Standard Information

• Brand: DANCO
• Manufacturer Part Number: 35766B