Iron Fasteners | McMaster-Carr

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System of Measurement

Thread Size

Length

Screw Size

Finish

Hot-Dipped Galvanized

Nut Type

Washer Type

Component

Width

Thread Direction

Mount Type

Threaded Through Hole

Handle Style

Threading

Clamp Type

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

Yes

Export Control Classification Number (ECCN)

REACH

Thread Type

Fastener Head Type

DFARS Specialty Metals

Thickness

RoHS

Compliant with Exemptions

Thread Pitch

Grip Style

491 Products

Fastening and Joining

Leveling Washers

Curved or tapered to compensate for uneven mounting surfaces

30 products

Cross-Bracing Washers

Connect cross-bracing rods or cables to structural beams; also known as hillside washers

20 products

Washers

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

12 products

Thumb Screws

Tighten and loosen by hand without the need for tools

69 products

Hex Head Screws

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

66 products

Thumb Nuts

Easy to tighten and loosen by hand for making frequent adjustments

5 products

Rivet Tool Bucking Bars

Place against the back side of your rivet while hammering the head

2 products

Power Transmission

Precision Lead Screw Nuts

Pair with precision lead screws for accurate starts and stops in your assembly

44 products

Lead Screw Nuts

Mate with lead screws to move components in a straight line

38 products

Fabricating and Machining

C-Clamps

Temporarily secure workpieces together or to a work surface

28 products

Clamping Screw Nuts

Combine with other coil-thread components to build a fast-threading clamping assembly

5 products

Bar Clamps

Secure large materials with adjustable arms for even pressure distribution

23 products

Corner Clamps

Align and secure materials at a corner joint

3 products

Pipe Welding Clamps

Position and hold pipe joints for welding and assembly

2 products

Fixture Clamps

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

10 products

Building and Machinery Hardware

Handle Nuts

Attach to threaded shafts to quickly turn the shafts by hand

35 products

Machine Handles

Arms give you extra leverage to secure and position jigs, fixtures, and other equipment

7 products

Knobs

Position, tighten, and secure fixtures and equipment

20 products

Slip-On Framing and Fittings

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

2 products

Strut Channel Nuts

Fasten on threaded rod to connect components to strut channel

2 products

Material Handling

Eye Nuts

Pair with bolts or threaded rod to lift and hang components

13 products

Ring Links

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

4 products

Rope Cleats

Temporarily secure rope

8 products

Fluid Handling

Hose Crimpers

Crimp ferrules onto hose to secure fittings

22 products

Pipe and Pipe Fittings

Generally thicker and more rigid than tubing for distributing liquids and gases through your facility

18 products