Remove Broken Bolts, Studs & Screws

A snapped fastener can bring an otherwise straightforward repair to a standstill. Sutton screw extractors give mechanics, fitters, maintenance crews, fabricators & workshop technicians a purpose-built way to remove broken bolts, studs, socket screws & fittings before the surrounding thread or component becomes the next repair.

Sutton Easy-Out screw extractors use aggressive left-hand spiral flutes designed to embed deeper as resistance increases. Their square end allows controlled hand operation with a suitable holder, while the extractor works inside a correctly prepared pilot hole. Sutton also specifies recommended drill sizes for its Easy-Out range, so extractor selection & pilot-hole preparation should be treated as one process rather than two separate decisions.

Before drilling anything, inspect the failure. Check the fastener size, where it has broken, how much material remains accessible & whether corrosion, seizure or thread damage may be contributing to the resistance. A carefully centred pilot hole can give the extractor a useful start while helping protect the surrounding female thread.

Preparing for extraction?  Drill Bit Sets can support the pilot-hole stage, while  Tap & Die Sets become relevant when the thread needs attention after the broken fastener is removed.

What Does a Sutton Screw Extractor Actually Remove?

The name only tells part of the story.

Sutton Easy-Out extractors aren't limited to screws with damaged heads. The range is designed for removing broken studs, bolts, socket screws & fittings, making it useful across mechanical servicing, equipment maintenance, automotive repair & workshop recovery jobs.

The usual method starts with a pilot hole drilled into the broken fastener using the recommended drill diameter.

The extractor then engages inside that prepared hole. Its left-hand spiral flutes grip the fastener as controlled turning force is applied in the removal direction.

The goal isn't maximum force.

It's enough grip & torque to release the damaged fastener without turning one problem into two.

First Question: Where Did the Fastener Break?

The position of the break changes the job.

Broken Flush With the Surface

A bolt snapped level with a housing, bracket or machine component leaves almost nothing available for conventional gripping tools.

Pilot-hole accuracy becomes especially important.

Starting too far off-centre reduces the amount of fastener material on one side of the hole & moves the drill closer to the female thread you're trying to preserve.

Broken Below the Surface

A recessed break introduces both an access & alignment challenge.

The drill needs to reach the broken face while remaining centred through the available opening. Visibility can also become limited as the break sits deeper inside the component.

Poor access shouldn't become permission to drill by guesswork.

Broken Above the Surface

Some failures leave part of the stud or bolt protruding.

Before automatically drilling it, inspect whether enough sound material remains for another appropriate removal method.

Sometimes the best extraction hole is the one you don't need to drill.

Match the Sutton Easy-Out to the Broken Fastener

Extractor selection starts with the size of the fastener being removed.

Sutton's individual M602 Easy-Out range covers multiple extractor sizes matched to specified bolt ranges.

Don't choose an extractor simply because it fits into whatever hole has already been drilled.

An oversized pilot hole can unnecessarily reduce the remaining wall of the broken fastener, while an incorrectly matched extractor may not engage as intended.

Check the Sutton product information for both extractor size & recommended pilot drill size before drilling.

The Pilot Hole Is Part of the Extraction Tool

The Easy-Out gets the credit when the bolt finally moves.

The pilot hole often decides whether it gets that opportunity.

Sutton advises pre-drilling the broken bolt using the recommended drill size before inserting the extractor.

Pay attention to three things:

► Centre position – keep the hole as accurately centred as practical.
► Drill diameter – match the drill to the selected extractor recommendation.
► Drilling depth – create enough engagement without drilling unnecessarily beyond the broken fastener.

Where the application allows, establishing a controlled starting point can help prevent the drill from wandering across an irregular fractured surface.

 Punches & Awls can support marking & starting work across suitable workshop repairs.

Why Do Sutton Easy-Outs Use Left-Hand Spiral Flutes?

The extractor has to bite while the broken fastener is being turned towards removal.

Sutton Easy-Outs use aggressive left-hand spiral flutes designed to embed more deeply as resistance increases.

That gives the extractor its gripping action inside the prepared pilot hole.

It doesn't create unlimited removal force.

A badly corroded, seized or mechanically locked fastener can continue resisting even after the extractor has engaged. Increasing torque without reassessing the situation can place more load through the extraction setup.

Grip is useful.

Judgement still matters.

Why Controlled Hand Operation Matters?

Sutton's M602 Easy-Out design has a square end for hand operation with a suitable holder.

That gives the operator something valuable during a stubborn extraction: feedback.

As turning force increases, hand operation makes it easier to feel whether the fastener is beginning to move or resistance is continuing to climb.

Keep the extractor aligned with the pilot hole while applying controlled torque.

Avoid treating sideways leverage as extra extraction power.

For surrounding disassembly & reassembly work,  Spanner & Wrench Sets provide a useful next step around mechanical repair.

Five Checks Before the Extractor Goes In

Identify the Broken Fastener

Bolt, stud, socket screw or fitting?

Know what you're removing before choosing the recovery method.

Confirm Its Size

Match the fastener diameter against the appropriate Sutton extractor range rather than selecting an Easy-Out by eye.

Locate the Centre

A centred pilot hole gives the extractor more balanced material to grip while helping keep the drill away from the surrounding thread.

Consider Why It Failed

Did the fastener snap during tightening? Has corrosion seized it in place? Were the threads already damaged?

The likely cause can provide useful clues about the resistance you'll encounter.

Plan What Happens After Removal

Getting the broken material out isn't automatically the end of the repair.

The female thread still needs to be inspected before another fastener goes in.

Extraction & Thread Repair Are Two Different Jobs

A successful extraction removes the obstruction.

It doesn't guarantee the original thread is undamaged.

Once the broken bolt, stud or fitting is out, clean the opening & inspect the female thread. Damage may have existed before the failure or occurred while the fastener was breaking.

Where appropriate, a tap may help clean or restore an existing internal thread. More substantial damage can require another repair method.

Don't celebrate the extraction by immediately forcing a replacement bolt into a questionable thread.

Example: The Last Bolt on a Steel Bracket Snaps

Three bolts come out normally.

The fourth breaks close to the mounting face.

It's tempting to grab the nearest drill bit & start cutting before the frustration wears off.

A more controlled sequence is:

► Clean the fractured surface.
► Confirm the broken bolt size.
► Establish the centre.
► Match the Sutton Easy-Out to the fastener range.
► Check the recommended pilot drill size.
► Drill accurately into the broken bolt.
► Engage the extractor squarely.
► Apply progressive hand torque.
► Inspect the female thread once the bolt is removed.
► Select the correct replacement fastener.

When the repair reaches that final stage,  Bolts & Fasteners provides the logical path into replacement hardware.

Example: A Stud Breaks Below the Surface of a Machine Component

Now the challenge changes.

There's no exposed head, the fractured face is recessed & the surrounding component may be far more valuable than the broken stud.

Clean the opening first so the break can be seen clearly. Establish whether the drill can approach squarely & whether there's enough access to keep the pilot hole centred.

If the component can be safely secured for appropriate bench work,  Clamps & Vises may help create a more controlled setup.

A few extra minutes spent establishing alignment can be considerably cheaper than repairing the hole beside the stud.

Practical Tips for Broken-Fastener Extraction

Clean the broken face first. Rust, paint, oil & fractured debris can hide the true centre.

Match the extractor to the fastener. Bigger isn't automatically better when increasing extractor size means removing more of the broken bolt.

Use the recommended drill diameter. The extractor needs a correctly prepared pilot hole to engage as intended.

Keep the drilling centred. Protecting the surrounding female thread should remain part of the job.

Approach squarely. Misalignment can introduce unwanted side load while also moving the pilot hole away from the fastener centre.

Build torque progressively. Controlled force gives you more opportunity to recognise when resistance isn't changing normally.

Watch for a change in feel. Movement can indicate the fastener is beginning to release. Rapidly increasing resistance deserves reassessment.

Inspect before reassembly. The old bolt leaving doesn't prove the female thread is ready for the new one.

Use the correct replacement hardware. Match thread, diameter & application rather than substituting whatever happens to fit.

Know when to stop. Continuing to force a stalled extraction can make the next recovery step considerably harder.