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The LARSEN SUPPLY CO., INC. XS-554P is a brass faucet bibb screw used to secure the bibb washer at the base of a stem in compression-style faucets and sillcocks. Sized at 1/2 inch length with a 10-24 machine thread, this S-5 style screw is a standard replacement component in residential and light commercial faucet repair. Sold in a bagged pack of 10, it suits plumbers and service techs who keep common repair hardware stocked on the truck. The brass construction resists corrosion in wet service environments and holds up to repeated torque cycles during washer replacement.
This bibb screw is used during stem rebuilds on compression faucets, hose bibs, and sillcocks. It fastens the rubber bibb washer to the end of the faucet stem, and is one of the most frequently replaced small parts during a standard faucet repair call. The 10-24 thread size and 1/2 inch length match the S-5 washer screw specification common across a wide range of residential compression faucet stems.
Designed as an OEM-style replacement bibb screw for compression faucet stems requiring a 1/2 inch, 10-24 thread, S-5 style screw.
This part is typically installed by licensed plumbers or experienced service technicians during faucet stem rebuilds or washer replacement. Shut off the water supply at the stop valve before disassembly. Use a properly sized screwdriver to avoid damaging the brass head, and do not overtighten, as brass threads can strip if excessive force is applied. Work should conform to applicable local plumbing codes and IPC guidelines.
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