Screw Locks | McMaster-Carr

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System of Measurement

Thread Size

Material

Stainless Steel

Length

Screw Size

Finish

Corrosion-Resistant Coated

Dry Film Lubricated

Phosphate Coated

Zinc Flake Coated

Zinc Yellow-Chromate Plated

Threaded Insert Type

ID

Fastener Head Type

OD

Drive Style

Tamper-Resistant Torx

Washer Type

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

Thread Type

For Use In

Thickness

0.010" to 0.013"

0.010" to 0.015"

0.010" to 0.016"

Thread Pitch

Shaft Diameter

DFARS Specialty Metals

RoHS

Compliant with Exemptions

REACH

Threading

Partially Threaded

Hole Diameter

Export Control Classification Number (ECCN)

Thread Direction

Specifications Met

Fed. Spec. QQ-P-35

How can we improve?

12,120 Products

Fastening and Joining

Standoffs

Separate, position, or connect components in assemblies

Shoulder Screws

Shoulder Screws

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

Rounded Head Screws

Rounded Head Screws

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

Hex Head Screws

Hex Head Screws

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

Captive Panel Screws

Captive Panel Screws

Secure panels and enclosures while still having access to them

Socket Head Screws

Socket Head Screws

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

Joint Clamps for Wood

Joint Clamps for Wood

Make secure joints between boards, butcher blocks, and countertops

Flat Head Screws

Flat Head Screws

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

Tapping Screws

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

Set Screws

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

Elevator Bolts

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

Plow Bolts

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

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

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

Disc Springs

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

Bearing Lock Washers

Bearing Lock Washers

Lock bearing nuts in place to prevent loosening due to vibration

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