Screw Locks | McMaster-Carr

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Stainless Steel

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Tamper-Resistant Torx

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Corrosion-Resistant Coated

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Zinc Flake Coated

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DFARS Specialty Metals

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Any Orientation

Chemical Resistant

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Finish-Your-Own

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RoHS

Compliant with Exemptions

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For Use In

Dissimilar Metals

Stainless Steel

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Thread Direction

Right Hand and Left Hand

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Installed Length

Less than 0.25"

0.25" to 0.499"

10 mm to 19.9 mm

20 mm to 24.9 mm

25 mm or greater

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17,526 Products

Fastening and Joining

Standoffs

Separate, position, or connect components in assemblies

Rounded Head Screws

Rounded Head Screws

Sit just above the surface for a low-profile finish and hold tighter than flat head screws

Socket Head Screws

Socket Head Screws

With a deeper drive than flat and rounded head screws, these withstand more torque for a tighter hold

Captive Panel Screws

Captive Panel Screws

Secure panels and enclosures while still having access to them

Set Screws

Exert pressure at the tip to hold parts in place, unlike screws that hold material together with threads

Hex Head Screws

Hex Head Screws

Used with nuts to create a stronger joint than flat and rounded screws

Flat Head Screws

Flat Head Screws

Fit in countersunk holes for a flush finish that won't snag on surrounding parts

Plow Bolts

The head sits flush with countersunk holes while the bolt stays in place when tightening a nut

Joint Clamps for Wood

Joint Clamps for Wood

Make secure joints between boards, butcher blocks, and countertops

Shoulder Screws

Shoulder Screws

Rotate parts around the cylinder under the head to guide and align them during installation

Tapping Screws

Fasten a range of materials together without needing to tap the hole first

Elevator Bolts

Create a flush joint to allow movement in tight spaces such as grain elevators and belting systems

Lock Washers

Resist vibration to prevent fasteners from loosening

Washers

Nearly every size and shape imaginable, from flat washers to clipped to curved

Threaded Inserts

Threaded Inserts

Create new threads or repair stripped threads

Binding Barrels

Binding Barrels

Create custom low-profile fasteners with binding barrel posts, caps, and screws

Threaded Insert Installation Tools

Threaded Insert Installation Tools

Install helical, key-locking, slotted-drive, and other threaded inserts

Fabricating and Machining

Locating Pin Lock Screws

Locating Pin Lock Screws

Secure removable locating pins

Drill Bushing Lock Screws

Drill Bushing Lock Screws

Prevent drill bushings from spinning

Fixture Clamps

Secure your workpiece to a fixture table so it won't move during machining

Clamp Holding Washers

Clamp Holding Washers

Replace worn washers on open-arm toggle clamps to keep holding screws in place

Power Transmission

Bearing Lock Washers

Bearing Lock Washers

Lock bearing nuts in place to prevent loosening due to vibration

Disc Springs

Maintain tension and separate components on shafts, under bolt heads, and at the ends of valves

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)