McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	ID ID

	OD OD

	Material Material

Rubber

Fabric

	Color Color	Show

	Green

	Color Color	Hide

	Black		Red
	White		Brown
	Clear		Blue
	Cream		Gray
	Beige		Gold
	Green		Orange
	Tan

	Diameter Diameter

	Thickness Thickness

0.054" to 0.070"

	Outer Circumference Outer Circumference

8"-1,200"

13"-1,200"

	Washer Type Washer Type

	Flat

	For Screw Size For Screw Size

	Maximum Temperature Maximum Temperature

400° to 499° F

	Minimum Temperature Minimum Temperature

-49° to 0° F

	Hardness Hardness

Durometer 70A

	For Minimum Pulley Diameter For Minimum Pulley Diameter

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106 Products

About Sizing Belts

About Washers

Made of durable material, these washers resist wear from rubbing and scraping surfaces. They create a light duty seal around fasteners to prevent fluids from leaking and damp vibration.

Aramid fabric/Buna-N rubber washers have good oil resistance.

For technical drawings and 3-D models, click on a part number.

				Temperature Range, °F
For Screw Size	ID	OD	Thick.	Min.	Max.	Hardness	Color	Pkg. Qty.		Pkg.
Aramid Fabric/Buna-N Rubber
1/4"	0.250"	0.500"	0.054"-0.070"	-20°	460°	Durometer 70A	Green	10	000000000	00000
1/4"	0.250"	0.625"	0.054"-0.070"	-20°	460°	Durometer 70A	Green	10	000000000	0000
5/16"	0.312"	0.625"	0.054"-0.070"	-20°	460°	Durometer 70A	Green	10	000000000	0000
5/16"	0.312"	0.750"	0.054"-0.070"	-20°	460°	Durometer 70A	Green	10	000000000	0000
3/8"	0.375"	0.625"	0.054"-0.070"	-20°	460°	Durometer 70A	Green	10	000000000	0000
3/8"	0.375"	0.750"	0.054"-0.070"	-20°	460°	Durometer 70A	Green	10	000000000	0000
1/2"	0.500"	0.875"	0.054"-0.070"	-20°	460°	Durometer 70A	Green	5	000000000	0000
1/2"	0.500"	1.000"	0.054"-0.070"	-20°	460°	Durometer 70A	Green	5	000000000	0000
5/8"	0.625"	1.000"	0.054"-0.070"	-20°	460°	Durometer 70A	Green	5	000000000	0000
5/8"	0.625"	1.500"	0.054"-0.070"	-20°	460°	Durometer 70A	Green	5	000000000	0000
3/4"	0.750"	1.500"	0.054"-0.070"	-20°	460°	Durometer 70A	Green	5	000000000	0000
3/4"	0.750"	2.000"	0.054"-0.070"	-20°	460°	Durometer 70A	Green	5	000000000	0000
1"	1.000"	1.500"	0.054"-0.070"	-20°	460°	Durometer 70A	Green	5	000000000	0000
1"	1.000"	2.000"	0.054"-0.070"	-20°	460°	Durometer 70A	Green	5	000000000	0000

Chemical-Resistant Made-to-Order Round Belts

Outer Circumference

In addition to chemical resistance, these belts also provide increased abrasion resistance over heavy duty round belts. Also known as O-ring and endless belts, they come ready to use.

To Order: Please specify outer circumference in 1/4" increments.

Dia.	Outer Circumference	For Min. Pulley Dia.	Material	Color		Per Inch
2mm	8"-1,200"	18mm	Polyurethane Rubber	Green	0000000	00000
4mm	8"-1,200"	36mm	Polyurethane Rubber	Green	0000000	000
6mm	8"-1,200"	54mm	Polyurethane Rubber	Green	0000000	0000
8mm	8"-1,200"	71mm	Polyurethane Rubber	Green	0000000	0000
10mm	8"-1,200"	89mm	Polyurethane Rubber	Green	0000000	0000

Heavy Duty Made-to-Order Round Belts

Outer Circumference

These belts are reinforced with a polyester cord for strength. Also known as O-ring and endless belts, they come ready to use.

To Order: Please specify outer circumference in 1/4" increments.

Dia.	Outer Circumference	For Min. Pulley Dia.	Material	Reinforcement Material	Color		Per Inch
1/8"	13"-1,200"	2 1/16"	Polyurethane Rubber	Polyester Plastic	Green	000000	00000
3/16"	13"-1,200"	2 1/16"	Polyurethane Rubber	Polyester Plastic	Green	000000	0000
1/4"	13"-1,200"	2 3/4"	Polyurethane Rubber	Polyester Plastic	Green	000000	0000
5/16"	13"-1,200"	3 7/16"	Polyurethane Rubber	Polyester Plastic	Green	000000	0000

Textured Round Belts

Outer Circumference

Often used with lathes and conveyors, these textured belts grip better than standard round belts, making sure heavy loads don’t slip. The solid core makes these belts strong and durable, and they stretch less than hollow core belts. Made from polyurethane, they hold up to chemicals and abrasion. Also known as O-ring and endless belts, they come ready to use.

2 mm Dia.
Outer Circumference, mm	Material	Color		Each
203	Polyurethane Rubber	Green	00000000	00000
229	Polyurethane Rubber	Green	00000000	0000
254	Polyurethane Rubber	Green	00000000	0000
279	Polyurethane Rubber	Green	00000000	0000
305	Polyurethane Rubber	Green	00000000	0000
406	Polyurethane Rubber	Green	00000000	0000
432	Polyurethane Rubber	Green	00000000	0000
457	Polyurethane Rubber	Green	00000000	0000
483	Polyurethane Rubber	Green	00000000	0000
508	Polyurethane Rubber	Green	00000000	0000
559	Polyurethane Rubber	Green	00000000	0000
660	Polyurethane Rubber	Green	00000000	00000
686	Polyurethane Rubber	Green	00000000	00000
711	Polyurethane Rubber	Green	00000000	00000
813	Polyurethane Rubber	Green	00000000	00000
914	Polyurethane Rubber	Green	00000000	00000
1,016	Polyurethane Rubber	Green	00000000	00000
1,219	Polyurethane Rubber	Green	00000000	00000
1,270	Polyurethane Rubber	Green	00000000	00000
4 mm Dia.
203	Polyurethane Rubber	Green	00000000	0000
229	Polyurethane Rubber	Green	00000000	0000
254	Polyurethane Rubber	Green	00000000	0000
279	Polyurethane Rubber	Green	00000000	0000
305	Polyurethane Rubber	Green	00000000	0000
356	Polyurethane Rubber	Green	00000000	0000
381	Polyurethane Rubber	Green	00000000	0000
457	Polyurethane Rubber	Green	00000000	00000
483	Polyurethane Rubber	Green	00000000	00000
508	Polyurethane Rubber	Green	00000000	00000
559	Polyurethane Rubber	Green	00000000	00000
610	Polyurethane Rubber	Green	00000000	00000
635	Polyurethane Rubber	Green	00000000	00000
660	Polyurethane Rubber	Green	00000000	00000
711	Polyurethane Rubber	Green	00000000	00000
762	Polyurethane Rubber	Green	00000000	00000
813	Polyurethane Rubber	Green	00000000	00000
914	Polyurethane Rubber	Green	00000000	00000
965	Polyurethane Rubber	Green	00000000	00000
1,016	Polyurethane Rubber	Green	00000000	00000
1,067	Polyurethane Rubber	Green	00000000	00000
1,219	Polyurethane Rubber	Green	00000000	00000
1,270	Polyurethane Rubber	Green	00000000	00000
1,372	Polyurethane Rubber	Green	00000000	00000
1,422	Polyurethane Rubber	Green	00000000	00000
1,524	Polyurethane Rubber	Green	00000000	00000
6 mm Dia.
203	Polyurethane Rubber	Green	00000000	0000
229	Polyurethane Rubber	Green	00000000	0000
254	Polyurethane Rubber	Green	00000000	00000
279	Polyurethane Rubber	Green	00000000	00000
305	Polyurethane Rubber	Green	00000000	00000
457	Polyurethane Rubber	Green	00000000	00000
483	Polyurethane Rubber	Green	00000000	00000
508	Polyurethane Rubber	Green	00000000	00000
533	Polyurethane Rubber	Green	00000000	00000
559	Polyurethane Rubber	Green	00000000	00000
610	Polyurethane Rubber	Green	00000000	00000
635	Polyurethane Rubber	Green	00000000	00000
660	Polyurethane Rubber	Green	00000000	00000
711	Polyurethane Rubber	Green	00000000	00000
762	Polyurethane Rubber	Green	00000000	00000
813	Polyurethane Rubber	Green	00000000	00000
864	Polyurethane Rubber	Green	00000000	00000
914	Polyurethane Rubber	Green	00000000	00000
965	Polyurethane Rubber	Green	00000000	00000
1,168	Polyurethane Rubber	Green	00000000	00000
1,270	Polyurethane Rubber	Green	00000000	00000
8 mm Dia.
305	Polyurethane Rubber	Green	00000000	00000
457	Polyurethane Rubber	Green	00000000	00000
610	Polyurethane Rubber	Green	00000000	00000
686	Polyurethane Rubber	Green	00000000	00000
762	Polyurethane Rubber	Green	00000000	00000
838	Polyurethane Rubber	Green	00000000	00000
914	Polyurethane Rubber	Green	00000000	00000
1,016	Polyurethane Rubber	Green	00000000	00000
1,067	Polyurethane Rubber	Green	00000000	00000
1,245	Polyurethane Rubber	Green	00000000	00000
10 mm Dia.
559	Polyurethane Rubber	Green	00000000	00000
711	Polyurethane Rubber	Green	00000000	00000
813	Polyurethane Rubber	Green	00000000	00000
914	Polyurethane Rubber	Green	00000000	00000
1,118	Polyurethane Rubber	Green	00000000	000000
1,270	Polyurethane Rubber	Green	00000000	000000
1,626	Polyurethane Rubber	Green	00000000	000000

Terms and Conditions and Privacy Policy

About Sizing Belts

About Washers

Abrasion-Resistant Rubber and Plastic Sealing Washers

Chemical-Resistant Made-to-Order Round Belts

Heavy Duty Made-to-Order Round Belts

Textured Round Belts