1/4"-20 Bolts | McMaster-Carr

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6,177 Products

Fastening and Joining

Hex Head Screws

Hex Head Screws

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

Rounded Head Screws

Rounded Head Screws

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

Flat Head Screws

Flat Head Screws

Fit in countersunk holes for a flush finish

Tighten and loosen by hand without the need for tools

Carriage Bolts

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

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

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

Set Screws

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

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

Square Head Screws

Square Head Screws

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

Fastener Assortments

Fastener Assortments

Stay prepared by keeping fasteners in common sizes and materials on hand

T-Bolts

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

Studs

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

Hold-Down Bolts

Hold-Down Bolts

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

Joint Clamps for Wood

Joint Clamps for Wood

Make secure joints between boards, butcher blocks, and countertops

Captive Panel Screws

Captive Panel Screws

Secure panels and enclosures while still having access to them

Wood Screws

Fasten material to wood or pieces of wood to each other

Threaded Rods

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

Binding Barrels and Screws

Binding Barrels and Screws

Thread together for a low-profile fastener

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

Single-End Studs

Single-End Studs

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

Standoffs

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

Anchors

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

Rivet Nuts

Add threads to thin panels with access from only one side; also known as blind inserts

Weld Nuts

Weld to metal surfaces to add permanent threads

Spring Plungers

Spring Plungers

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

Stud Welders

Join studs and pins to metal, leaving no marks on the back of the material

Material Handling

Eyebolts

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

Hoist Rings

Pivot to resist stress that would bend or break an eyebolt when lifting at an angle

Eye Nuts

Pair with bolts or threaded rod to lift and hang components

U-Bolts

Anchor heavy pipe, tube, and conduit; stronger than routing clamps and hangers

Routing Ring Bases

Routing Ring Bases

Temporarily attach routing rings to steel and iron surfaces with a magnet

Routing Rings

Suspend wire and cable by feeding it through the eyehole

Wheel Axles

Connect rotating wheels and support vehicles

Fabricating and Machining

T-Tracks

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

Setup Studs

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

T-Slot Nuts

Combine with setup studs or bolts to mount fixtures to machine tables

Clamps

Hold workpieces securely in place

Building and Machinery Hardware

Cam Handles

For fast clamping, push down on the handle to draw two parts together

T-Slotted Framing and Fittings

T-Slotted Framing and Fittings

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

Containers, Storage, and Furniture

Hanging Hooks

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

Power Transmission

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

Facility and Grounds Maintenance

Toilet Mounts

Secure toilet components with flanges and hardware kits

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