Twist Screws | McMaster-Carr

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ASTM Grade A325

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MSS SP-69 Type 15

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78,399 Products

Fastening and Joining

Tighten and loosen by hand without the need for tools

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

Tapping Screws

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

Rounded Head Screws

Rounded Head Screws

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

10,401 products

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

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

Studs

Press, weld, or screw in place to add a threaded fastening point

Wood Screws

Fasten material to wood or pieces of wood to each other

Flat Head Screws

Flat Head Screws

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

Pentagon Head Screws

Pentagon Head Screws

Create a tamper-resistant joint with a head than can only be removed with a 5-point socket

Fastener Assortments

Fastener Assortments

Keep a variety of common screws, nuts, and washers on hand

Joint Clamps for Wood

Joint Clamps for Wood

Make secure joints between boards, butcher blocks, and countertops

Jack Screws

Secure computer cables and panels

Drywall Screws

Fasten panels of drywall to materials such as wood, metal, and drywall

12-Point Screws

12-Point Screws

12 contact points handle more torque than a hex head while a flange eliminates the need for a washer

Shoulder Screws

Shoulder Screws

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

T-Bolts

Turn by hand for easy fastening, use as a handle, or attach as a point for straps and clamps

Square Head Screws

Square Head Screws

Turn the large flat sides with a wrench into square holes that stop further rotation

Hold-Down Bolts

Hold-Down Bolts

Hold material under the bent head while the other end is tightened down with a nut

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

Carriage Bolts

A smooth head provides a finished look while a square neck keeps the bolt in place when using a nut

Oval Head Screws

Oval Head Screws

A decorative, domed head sits above the surface when installed

Screw Nails

Drive like nails but hold like screws in drilled holes in wood, plastic, drywall, and masonry

Nails

Drive into wood, plastic, drywall, and masonry

Spring Plungers

Spring Plungers

Apply accurate, consistent pressure for positioning, indexing, and ejecting parts

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

Threaded Rods

Anchor, connect, or hang components in a wide variety of applications

Single-End Studs

Single-End Studs

Use the unthreaded end as a pivot point, hinge, shaft, or locator pin

Anchors

Secure anything from signs to heavy machinery in concrete, brick, and drywall

Rivets

Join materials together permanently, especially when too thin or fragile to fasten with screws

Captive Pins

Press into holes in thin materials like panels and circuit boards to permanently join or align them

Standoffs

Threaded to separate or connect parts as well as position components in assemblies

Binding Barrels and Screws

Binding Barrels and Screws

Thread together for a low-profile fastener

Anchor Toggles

Replace your anchor toggle if it falls when removing your toggle bolt

Standoff Caps

Create a finished look on standoffs and protect them from dirt and debris

Tapping Screw Installation Tools

Tapping Screw Installation Tools

Use with a hammer drill to install tapping screws in concrete, block, and brick

Hanger Bolt Driver Bits

Hanger Bolt Driver Bits

Turn flat-end bolts and screws

Anchor Installation Tools

Anchor Installation Tools

Drive with a hammer to expand and secure anchors in place

Building and Machinery Hardware

Knobs

Position, tighten, and secure fixtures and equipment

Indicating Knobs

Indicating Knobs

Control devices and view settings at a glance

Pull Knobs

Use a knob to open and close cabinets, drawers, and doors

Protective Caps

Protective Caps

Protect just about anything, including pipe, flanges, screws, and posts

Protective Plugs

Protective Plugs

Insert into holes in pipe, containers, panels, and parts to keep out debris

Protective Feet

Protective Feet

Add to furniture and light equipment to protect floors from scratches and wear

Leveling Mounts

Leveling Mounts

Level machines and workbenches on uneven surfaces, reduce vibration, and protect floors

T-Slotted Framing and Fittings

T-Slotted Framing and Fittings

The most versatile system, attach fittings along the continuous slots to build virtually anything

Strut Channel Framing and Fittings

Strut Channel Framing and Fittings

Secure fittings in the U-shaped channel to route conduit and pipe or build other structures

Slip-On Framing and Fittings

Slip-On Framing and Fittings

Insert rails into fittings and tighten screws to make guards, railings, and racks

Clamp-On Framing and Fittings

Clamp-On Framing and Fittings

Two-piece fittings let you modify assembly stations, conveyors, and racks without dismantling them

Locking-Slotted Framing and Fittings

Locking-Slotted Framing and Fittings

Make platforms, bases, and other structures that stand up to more movement than T-slotted framing

Measuring and Inspecting

Transfer Punches

Transfer Punches

Mark the center of an existing hole onto a separate workpiece

Coordinate Measuring Machine Fixture Clamps

Coordinate Measuring Machine Fixture Clamps

Keep workpieces in place for hands-free measuring and inspecting

Fabricating and Machining

Gear and Bearing Puller Shaft Protectors

Gear and Bearing Puller Shaft Protectors

Prevent forcing screws on pullers from causing damage

Gear and Bearing Puller Step-Plate Adapters

Gear and Bearing Puller Step-Plate Adapters

Provide a surface for forcing screws on pullers to push against

Drill Bushing Lock Screws

Drill Bushing Lock Screws

Prevent drill bushings from spinning

Clamps

Hold workpieces securely in place

Setup Studs

Secure setup clamps and fixtures to your machine table or assemble heavy machines

Fixture Kits

Everything needed to mount workpieces of different sizes to your machine table

T-Slot Bolts

Secure clamps and workpieces to machine tables with quicker setup than a T-slot nut and stud

Clamp Holding Screws

Clamp Holding Screws

Replace worn holding screws in clamps or customize with different sizes or styles

T-Tracks

Add fixturing to flat surfaces on machines such as table saws, CNC routers, and drill presses

Lathe Tools

Shape workpieces as they rotate on a lathe

Gear and Bearing Puller Forcing Screws

Gear and Bearing Puller Forcing Screws

Replace forcing screws on gear and bearing pullers

Lathe Tool Insert Holder Replacement Parts

Lathe Tool Insert Holder Replacement Parts

Replace clamps, screws, shims, and other parts in lathe tool insert holders

Fixture Clamps

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

Fluid Handling

Float Rods

Connect valve bodies and floats to build or repair a float valve

Electrical

Grounding Screws

Grounding Screws

Fasten grounding wires to steel structures, fence posts, and transformers

Binding Posts

Test circuits before making permanent connections

Grounding Lugs

Create a common grounding path for internal components and circuits, as well as the enclosure body

Wire Splices

Connect wires end to end to extend or repair a run

Electrical Enclosure Pole Mounts

Electrical Enclosure Pole Mounts

Everything you need to secure enclosures to round poles or beams

Electrical Enclosure Fasteners

Electrical Enclosure Fasteners

Mount components to your enclosure without worrying about leaks

Power Transmission

Lead and Ball Screw End Supports

Lead and Ball Screw End Supports

Brace and secure the ends of lead screws and ball screws

Ball Screws and Nuts

Ball Screws and Nuts

Provide smooth travel where high speeds, accurate positioning, and repeatable movement are required

Connecting Rods

Connecting Rods

Use with rod ends and swivel joints to link components in push/pull assemblies

Lead Screws and Nuts

Lead Screws and Nuts

Components travel along a screw with broad, square threads to clamp and lift heavy loads

Ball Screw/Splines and Bearings

Ball Screw/Splines and Bearings

Transmit rotary power, move loads along the shaft, or do both at once

Roller Screws and Nuts

Roller Screws and Nuts

Create more points of contact to handle much higher loads than ball screws and nuts of the same size

Material Handling

Wheel Axles

Connect rotating wheels and support vehicles

Eye Nuts

Pair with bolts or threaded rod to lift and hang components

Eyebolts

Route rope through the loop or attach hooks and shackles for lifting

Tie Wire Hangers

Tie Wire Hangers

Hang lightweight items such as suspended ceilings and lighting fixtures

Conveyors

Roller, skate wheel, ball transfer, belt, and vacuum conveyors

Jacks

Lift, hold, push, and position heavy objects

Screw Jack End Fittings

Screw Jack End Fittings

Thread onto screw jacks to create pivot points with clevis rod ends and other linkages

Screw Jack Mounts

Screw Jack Mounts

Stabilize screw jacks to support loads

Screw Conveyors

Screw Conveyors

Push material through fixed troughs

Containers, Storage, and Furniture

Hanging Hooks

Hang tools, hoses, garments, and other supplies on walls for easy access

Tool Holders

Mount brooms, cordless drills, flashlights, and other tools

Picture Hangers

Picture Hangers

Mount picture frames, plaques, and mirrors

Facility and Grounds Maintenance

Toilet Mounts

Secure toilet components with flanges and hardware kits

Toilet Tank Replacement Parts

Toilet Tank Replacement Parts

Replace parts such as flappers, fill valves, and floats in your toilet tank

Toilet Seat Fasteners

Toilet Seat Fasteners

Secure toilet seat hinges to your toilet bowl

Urinal Flanges

Connect a urinal to your drainage system

Communication

Reference Charts

Reference Charts

Check decimal equivalents, drill sizes, or specifications for socket screws

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