Screw Extractors

About Screw Extractors

Screw extractors are essential problem-solving tools designed to remove damaged, stripped, or broken screws and bolts that cannot be unfastened by conventional means. When a fastener head becomes rounded, sheared off, or corroded in place, a screw extractor provides a reliable solution by gripping the damaged component from within. MyToolShed.co.uk stocks a comprehensive range of screw extractor sets and individual extractors from trusted brands including Sealey, Draper, Irwin, and Dormer, suitable for professional tradespeople and DIY enthusiasts alike.

Available in various configurations including spiral flute extractors, multi-spline extractors, and bolt extractor socket sets, these tools work by biting into a pre-drilled pilot hole in the damaged fastener. The extractor's reverse-threaded design creates a tight grip that turns the stubborn fastener anti-clockwise for removal. MyToolShed offers sets ranging from compact 4-piece kits to comprehensive 40-piece collections, covering fastener sizes from M3 through to M30.

Applications

Screw extractors are invaluable across numerous trades and applications:

• Automotive mechanics – removing seized bolts from engine blocks, exhaust manifolds, and suspension components
• Maintenance engineers – extracting broken fixings from machinery and industrial equipment
• Plumbers – dealing with corroded screws in pipe fittings and radiator valves
• Electricians – removing damaged screws from consumer units and electrical enclosures
• Fabricators and metalworkers – extracting broken taps and drill bits from workpieces
• General construction – salvaging expensive components without causing further damage
• DIY and home maintenance – tackling stripped screws in furniture, appliances, and fixtures

Choosing The Right Screw Extractors

When selecting screw extractors from MyToolShed.co.uk, consider these key factors:

Size Range: Choose a set that covers the fastener sizes you commonly encounter. Professional kits typically range from 3mm to 19mm, whilst comprehensive sets extend to M30 for larger industrial applications.

Extractor Type: Spiral flute extractors suit most general applications, whilst multi-spline designs provide enhanced grip on severely damaged fasteners. Impact-rated stud extractors work with impact drivers for stubborn removals.

Material Quality: Look for extractors manufactured from hardened carbon steel or high-speed steel (HSS) for durability and resistance to breakage during use.

Set Configuration: Individual extractors work for specific jobs, but complete sets with various sizes offer better value and versatility for trade professionals.

Compatibility: Consider whether you need standard extractors for use with tap wrenches or socket-style bolt extractors that fit 3/8" or 1/2" drive ratchets.

Frequently Asked Questions

What size pilot hole should I drill before using a screw extractor?

The pilot hole size depends on the extractor size and damaged fastener diameter. Most extractor sets include recommended drill bit sizes, typically ranging from 60-80% of the fastener's root diameter. Always start with the smallest recommended size to preserve maximum material for the extractor to grip.

Why did my screw extractor break or snap off?

Extractors can break if excessive force is applied, the pilot hole is too small, or if the extractor isn't kept perfectly aligned during turning. Use penetrating oil, work slowly with steady pressure, and ensure the extractor is fully seated before applying torque. Hardened extractors are brittle by nature, so patience is essential.

Can I use screw extractors on stainless steel fasteners?

Yes, but stainless steel is harder and more challenging to work with. Use high-quality HSS or cobalt extractors, apply generous amounts of cutting fluid, and work at slower speeds. Pre-treating with penetrating oil for 24 hours significantly improves success rates with stainless steel.