Safety Fasteners | McMaster-Carr

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System of Measurement

Thread Size

Material

Length

Drive Style

Drilled Spanner

External Square

Tamper-Resistant Hex

Tamper-Resistant Torx

Tamper-Resistant Torx Plus

Fastener Head Type

Screw Size

Color

Fluorescent Blue

Fluorescent Green

Fluorescent Orange

Fluorescent Pink

Fluorescent Yellow

Finish

Cadmium Yellow-Chromate Plated

Corrosion-Resistant Coated

Hot-Dipped Galvanized

Molybdenum Disulfide Coated

Phosphate Coated

Specifications Met

ANSI/ASSP Z359.12

ANSI/HPVA HP-1 Type I

CSA C22.2 No. 18.5

CVSA Out-of-Service Criteria

D.O.T. Standard

Federal Specification

MSS SP-69 Type 15

Thickness

0.005" to 0.006"

Width

Performance

Chemical Resistant

Corrosion Resistant

Easy Inspection

Electrically Insulating

Flame Retardant

High Temperature

DFARS Specialty Metals

Threading

Partially Threaded

OD

RoHS

Compliant with Exemptions

ID

REACH

Export Control Classification Number (ECCN)

Thread Length

Maximum Temperature

Less than 100° F

100° F to 199.9° F

200° F to 249.9° F

250° F to 499.9° F

500° F or greater

Head Diameter

Screw Features

Tension Indicating

Thread Type

Head Height

How can we improve?

8,048 Products

Fastening and Joining

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

Socket Head Screws

Socket Head Screws

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

Flat Head Screws

Flat Head Screws

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

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

Tighten and loosen by hand without the need for tools

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

Set Screws

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

Retaining Rings

Retaining Rings

Hold components on a shaft

Washers

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

Binding Barrel Posts and Screws

Binding Barrel Posts and Screws

Thread together for a low-profile fastener

Sealing Washers

Sealing Washers

Prevent fluids from leaking around fasteners

Shear Pins

Use with shear hubs to break at a specific torque and safeguard machinery from overloads

Threaded Rods

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

Shims

Align and space components on shafts, or level machinery, cabinets, and doors

Spacers

Unthreaded to create space between two surfaces or objects, often to align them

Anchors

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

Hex Nuts

Handle most general fastening needs

Easy to tighten and loosen by hand for making frequent adjustments

Cap Nuts

Cover and protect threads while adding a finished look; also known as acorn nuts

Flange Nuts

The flange distributes pressure, so you don't need a washer

Sealing Nuts

Prevent leaks and block out contaminants with a rubber seal

Tamper-Resistant Nuts

Tamper-Resistant Nuts

Hard to detach without special tools to prevent unwanted removal

Safety Pins

Fasten tags, labels, and other objects to fabric without pricking yourself

Standoffs

Separate, position, or connect components in assemblies

Shim Stock

Cut into custom shapes to align, space, and level components on dies, presses, and machinery

Adhesives

Bond surfaces together

Hook and Loop

Press interlocking pieces together to join materials

Tape

Bind, seal, and mark surfaces

Electrical

Electrical Enclosure Fasteners

Electrical Enclosure Fasteners

Mount components to your enclosure without worrying about leaks

Conduit and Conduit Fittings

Conduit and Conduit Fittings

Protect wiring from impact and the environment in runs indoors, outdoors, and underground

Battery Terminal Adapters

Battery Terminal Adapters

Convert one battery terminal style to another

Battery Holders

Battery Holders

Create an electrical connection between batteries and contacts to power equipment

Wire Splices

Connect wires end to end to extend or repair a run

Fluid Handling

Pipe Locknuts

Thread onto the male end of a pipe fitting so it won't loosen from vibration

Tube and Tube Fittings

Tube and Tube Fittings

Typically more flexible than pipe for carrying liquids and gases in short runs around equipment

Building and Machinery Hardware

Bar Grating Clips

Bar Grating Clips

Secure grating to your support structure

Knobs

Position, tighten, and secure fixtures and equipment

Protective Plugs

Protective Plugs

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

Leveling Mounts

Leveling Mounts

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

Safety Equipment

Fall-Arrest Harness Lanyard Holders

Fall-Arrest Harness Lanyard Holders

Attach to your harness to hold unused lanyards out of the way

Chain Barrier Links

Chain Barrier Links

Split in half and snap back together to securely connect lengths of chain

Fabricating and Machining

C-Clamps

Temporarily secure workpieces together or to a work surface

Material Handling

Webbing Rings

Add looped connection spots

Eye Nuts

Pair with bolts or threaded rod to lift and hang components

Cable Holders

Mount to a surface to secure and route cable

U-Bolts

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

Hook and Loop Straps

Hook and Loop Straps

Pull apart and secure again and again as the size of your bundle changes

Webbing

Create straps for holding cargo in place

Hoist Rings

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

Chain Rings

Join chains and add connectors for binding, towing, and lifting

Ratchet Straps

Connect to anchor points and tighten incrementally to increase the tension, holding cargo in place

Ring Links

Bend, hammer, or twist closed to connect chain links and attach fittings

Carabiners

Hook onto rope and webbing to quickly connect objects, fittings, and other lengths of rope

Quick Links

Join rope, cable, and chain to secure loads

Cable Tie Mounts

Cable Tie Mounts

Attach to walls, machines, and other surfaces and add a cable tie to organize and secure bundles

Cable Ties

Bundle and secure cable, wire, and hose; also known as zip ties

Hooks

Lift, hang, and bind loads with rope and chain

Communication

Tamper-Evident Seals

Tamper-Evident Seals

Secure hasps, latches, and other connections to visibly indicate tampering

Name Badge Holders

Name Badge Holders

Protect and display name badges on clips, lanyards, and bands

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