AMSUO 5-Piece Screw Extractor Set (EXT-5) — Milled 40Cr Alloy Steel, Reverse Spiral Flutes, Hex Shank, for Broken Bolt & Stud Removal

AMSUO 5-Piece Screw Extractor Set (EXT-5) — Milled 40Cr Alloy Steel, Reverse Spiral Flutes, Hex Shank

Precision-milled from solid 40Cr alloy steel — a step up from threaded screw-type extractors. Milled construction delivers straighter, stronger spiral flutes that bite into broken bolts and studs without snapping, even when seized. Black hex shanks fit wrenches, drill chucks and 1/4" quick-change systems. Factory-direct from a 20-year precision-tools manufacturer with ISO 9001 / 14001 / 45001 triple-system certification.

What's in the Box

Model: EXT-5. Set size: 5 pieces (graduated). Material: 40Cr alloy steel, milled one-piece (not threaded/screw-type). Flute: reverse (left-hand) spiral with ground cutting edges. Shank: hex, black — fits wrenches, drill chucks and 1/4" quick-change systems.

Key Features

• Precision-milled from solid 40Cr alloy steel — stronger and more precise than threaded screw-type extractors
• 40Cr alloy steel delivers high strength and toughness for seized and hardened fasteners
• Reverse spiral flute design bites deeper as torque increases
• Black hex shanks fit wrenches, drill chucks and 1/4" quick-change chucks
• Ground silver cutting edges engage fast for clean gripping
• Five graduated sizes in one set cover common fastener sizes

Recommended Applications

• Removing broken bolts, studs and screws in engines, machinery and equipment
• Automotive repair — exhaust manifold bolts, caliper bolts, housing screws
• Plumbing, HVAC and industrial maintenance — seized and corroded fasteners
• Woodworking and furniture — stripped or snapped wood screws
• Farm and shop repair, fabrication, and DIY projects

How to Use

Center-punch the broken fastener, drill a pilot hole, tap the extractor into the hole and turn counterclockwise. Wear eye protection.

Quality & Certification

Produced in an ISO 9001 / 14001 / 45001 triple-certified facility — every extractor is inspected before packing.

FAQ

What is the advantage of milled 40Cr over threaded extractors?

Threaded screw-type extractors are cut from wire and can twist off under load. Milled one-piece 40Cr extractors have ground, precise flutes with higher torque and break resistance — safer on seized bolts.

How do I drive an EXT-5 extractor?

With a tap wrench on the hex shank, or in a drill chuck / 1/4" quick-change driver at low speed, turning counterclockwise once the flutes bite.

Can this set be private-labeled?

Yes — custom branding and packaging formats are part of our OEM program.

Get a Quotation

Email [email protected] or message us on WhatsApp for wholesale pricing, samples and lead times.