Value Collection 312-8924 Spiral Flute Screw Extractor Size 4

Product Description

The VALUE COLLECTION 312-8924 is a Size 4 spiral flute screw extractor designed to remove broken or seized screws with a diameter between 9/32 and 3/8 inches. The tool measures 2-7/8 inches overall length and is built for use with metric screws in the 8 to 10 mm range, as well as 1/8-inch NPT and 1/8-inch BSP threaded fasteners. The left-hand spiral flute design bites into the damaged fastener as the extractor is turned counterclockwise, providing mechanical grip without requiring adhesives or welding. It is a single-piece tool suited for bench work and field repair across trades.

This extractor is used in residential and commercial service applications where fasteners have sheared, stripped, or corroded in place. Typical scenarios include removing broken machine screws, pipe plugs, or studs during HVAC, plumbing, or general mechanical repair. The compatible screw size range covers common fastener sizes found in equipment housings, flanges, and threaded pipe fittings. It is sized for use with a standard drill press or hand drill in a shop or field environment.

Key Features

• Spiral flute geometry grips broken fasteners on reverse rotation for reliable extraction
• Covers screw diameter range of 9/32 to 3/8 inches and metric equivalent of 8 to 10 mm
• Compatible with 1/8-inch NPT and 1/8-inch BSP threaded fasteners
• Compact 2-7/8 inch overall length fits in tight access areas
• Single-unit packaging for individual tool replacement or kit supplementing

Compatibility

Compatible with broken or damaged screws sized 9/32 to 3/8 inches, 8 to 10 mm metric, 1/8-inch NPT, and 1/8-inch BSP. Designed as a Size 4 extractor for general mechanical, plumbing, and HVAC fastener removal applications.

Installation Notes

A licensed mechanic, plumber, or HVAC technician should de-energize equipment and relieve any system pressure before attempting fastener extraction. Drill a pilot hole into the center of the broken fastener using the appropriate left-hand drill bit before inserting the extractor. Apply steady, even counterclockwise torque to avoid snapping the extractor inside the fastener bore. Wear appropriate eye protection when drilling and extracting.