Twist Screws | McMaster-Carr

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System of Measurement

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Material

Fastener Head Type

Threading

Partially Threaded

Threaded on Both Ends

Threaded on One End

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Black Zinc Plated

Corrosion-Resistant Coated

Galvanic Barrier Coated

Hot-Dipped Galvanized

Head Diameter

Tip Type

Thread Pitch

Head Height

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Metric Rounded Trapezoidal

Metric Trapezoidal

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Thread Direction

Right Hand and Left Hand

Fastener Strength Grade/Class

ASTM Grade B8SH

ASTM Grade B8MSH

ASTM Grade A325

ASTM Grade A490

Screw Size

Thread Spacing

Socket Head Profile

Thread Length

Specifications Met

MSS SP-69 Type 15

DFARS Specialty Metals

Tensile Strength

Less than 10,000 psi

10,000 psi to 19,999 psi

20,000 psi to 29,999 psi

30,000 psi to 99,999 psi

100,000 psi or greater

RoHS

Compliant with Exemptions

REACH

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

Export Control Classification Number (ECCN)

How can we improve?

81,595 Products

Most Likely Products

Tighten and loosen by hand without the need for tools

Rounded Head Screws

Rounded Head Screws

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

10,439 products

Flat Head Screws

Flat Head Screws

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

Hex Head Screws

Hex Head Screws

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

11,746 products

Knobs

Position, tighten, and secure fixtures and equipment

Socket Head Screws

Socket Head Screws

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

All Results

Fastening and Joining

Tighten and loosen by hand without the need for tools

Rounded Head Screws

Rounded Head Screws

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

10,439 products

Flat Head Screws

Flat Head Screws

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

Hex Head Screws

Hex Head Screws

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

11,746 products

Socket Head Screws

Socket Head Screws

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

Wood Screws

Fasten material to wood or pieces of wood to each other

Tapping Screws

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

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

Studs

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

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

T-Bolts

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

Carriage Bolts

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

Masonry and Concrete Screws

Masonry and Concrete Screws

Anchor parts to masonry and concrete without tapping the hole first

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

Create vibration-resistant connections between D-sub cords 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

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

Oval Head Screws

Oval Head Screws

The domed top sits slightly above the surface of countersunk holes for a decorative look

Dowel Screws

Screw into holes to join two pieces of wood

Spring Plungers

Spring Plungers

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

Threaded Rods

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

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

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

Binding Barrels

Binding Barrels

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

Captive Pins

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

Nails

Drive into wood, plastic, drywall, and masonry

Standoffs

Separate, position, or connect components in assemblies

Screw Nails

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

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

Single-End Studs

Single-End Studs

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

Masonry and Concrete Screw Installation Tools

Masonry and Concrete Screw Installation Tools

Use with a hammer drill to install screws into masonry and concrete

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

T-Slotted Framing Fasteners

T-Slotted Framing Fasteners

Secure brackets and other accessories to T-slotted rails

Protective Plugs

Protective Plugs

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

Strut Channel Nuts

Strut Channel Nuts

Fasten on threaded rod to connect components to strut channel

Clamp-On Framing Fasteners

Clamp-On Framing Fasteners

Tighten to hold clamp-on framing in place

Locking-Slotted Framing Fasteners

Locking-Slotted Framing Fasteners

Secure brackets and other accessories to locking-slotted rails

Slip-On Framing Fasteners

Slip-On Framing Fasteners

Replace set screws used on slip-on framing

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

Fabricating and Machining

Clamping Screws

Clamping Screws

Apply pressure through a flat-tipped screw to hold material in place

Clamp Holding Screws

Clamp Holding Screws

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

Bar Clamps

Secure large materials with adjustable arms for even pressure distribution

Clamping Screw Mounting Bases

Clamping Screw Mounting Bases

Thread clamping screw clamps into the holes to hold workpieces

Gear and Bearing Puller Forcing Screws

Gear and Bearing Puller Forcing Screws

Replace forcing screws on gear and bearing pullers

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

T-Slot Bolts

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

Setup Studs

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

Drill Bushing Lock Screws

Drill Bushing Lock Screws

Prevent drill bushings from spinning

Fixture Kits

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

T-Tracks

A versatile foundation for custom fixturing setups

Fixture Clamps

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

Lathe Tool Insert Holder Replacement Parts

Lathe Tool Insert Holder Replacement Parts

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

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

Fluid Handling

Float Rods

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

Electrical Power, Networking, and Controlling

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 Screw Collars

Lead Screw Collars

Position components and limit travel along a lead screw

End Supports for Ball Screws and Precision Lead Screws

End Supports for Ball Screws and Precision Lead Screws

Brace and secure the ends of ball screws and precision lead screws

Ball Screws and Nuts

Ball Screws and Nuts

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

Precision Lead Screw Nut Flanges

Precision Lead Screw Nut Flanges

Pair with precision lead screw nuts to make custom flange nuts that move items along lead screws

Connecting Rods

Connecting Rods

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

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

Lead Screws and Nuts

Lead Screws and Nuts

Move components in a straight line in clamping and heavy duty lifting and lowering applications

Precision Lead Screws and Nuts

Precision Lead Screws and Nuts

Pair with a motor for accurate starts and stops in automated motion and positioning applications

Linear Drive Nuts

Linear Drive Nuts

Create a linear positioning system on a rotary shaft without a lead screw

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

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

Conveyor T-Slot Bolts

Conveyor T-Slot Bolts

Drop into the T-slot to mount components

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 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.)