Round Plates | McMaster-Carr

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System of Measurement

Diameter

Shape

Length

Material

Tolerance Rating

Hardness Rating

Fabrication

Hardness

Specifications Met

Fed. Spec. QQ-L-171 Grade C

ISO 13850

OSHA Compliant 29 CFR 1926.502

SAE Standard

Yield Strength

Less than 30,000 psi

30,000 psi to 39,999 psi

40,000 psi to 99,999 psi

100,000 psi to 199,999 psi

200,000 psi or greater

Performance

Thickness

Appearance

Mechanical Finish

Heat Treatment

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

REACH

RoHS

Compliant with Exemptions

Not Compliant

DFARS Specialty Metals

Maximum Temperature

Steel Grade

1018 Low-Carbon Steel

A36 Low-Carbon Steel

Export Control Classification Number (ECCN)

Minimum Temperature

3,225 Products

Raw Materials

Steel

Strong, machinable, and weldable—all with material certificates for traceability

2,717 products

Aluminum

Lightweight, easy to machine, and corrosion resistant—all with material certificates for traceability

104 products

Stainless Steel

Resists corrosion and chemicals in most environments—all with material certificates for traceability

39 products

Lead

A dense insulator often used to shield against radiation and absorb sound and vibration

15 products

Brass

More machinable than copper and bronze—all with material certificates for traceability

6 products

Copper

Our most conductive metal for electrical applications—all with material certificates for traceability

14 products

Titanium

The most corrosion-resistant metal we offer—all with material certificates for traceability

9 products

Ceramic

Hard and wear resistant, it also withstands corrosion and high temperatures

26 products

Facility and Grounds Maintenance

Drain Cleanout Hole Covers

Conceal drain cleanout plugs in walls and floors while keeping them accessible

26 products

Floor, Wall, and Ceiling Plates

Add a finishing touch around protruding pipes; also known as escutcheons

46 products

Floor Drain Covers

Put a lid on open drains to prevent accidents and injuries

2 products

Manhole Covers

Made of cast iron to handle high-volume foot and vehicle traffic.

6 products

Drain Cleanouts

Create an access point to inspect and clean floor drain pipelines

3 products

Food Service Plates

Disposable or reusable plates

7 products

Fastening and Joining

Washers

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

66 products

Shims

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

42 products

Material Handling

Screw Jack Mounts

Stabilize screw jacks to support loads

4 products

Communication

Legend Plates

Mark switches and lights on control panels for easy identification

25 products

Message Plates

Fasten to doors, walls, and plate holders to identify locations and objects

58 products

Electrical Power, Networking, and Controlling

Outlet Box Covers

Enclose wiring for outlets and switches or block off unused components

3 products

Wall Plates

Cover switches and outlets for a finished look or to close them off when not in use

1 product

Building and Machinery Hardware

Door Hole Covers

Eliminate gaps around handles and deadbolts, or conceal holes after removing handles

8 products