McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Thread Type Thread Type

	Material Material

Plastic

Fiberglass

Ceramic

	Nut Type Nut Type


Hex	Flange

Cap	Square

Thumb	Locknut

Coupling	Externally Threaded

Round

	Height Height

	Color Color

	Black		Off-White
	Gray		Brown
	White		Clear
	Beige		Blue
	Dark Blue		Green
	Light Blue		Orange
	Red		Yellow

	Width Width

	Hex Nut Profile Hex Nut Profile


Standard	Thin

	Component Component

	Thread Spacing Thread Spacing

Coarse

Fine

	Thread Direction Thread Direction


Right Hand	Left Hand

	Thread Pitch Thread Pitch

	Drive Style Drive Style


External Hex	External Square

	Number of Thread Starts Number of Thread Starts

	Type Type


Splice	Locknut

	Travel Distance per Turn Travel Distance per Turn

	Thread Fit Thread Fit

Class 2B

Class 6H

Class 2C

	Wire Splicing Connector Style Wire Splicing Connector Style


Straight	Winged

	Flange Diameter Flange Diameter

	Speed Ratio Speed Ratio

	For Wire Gauge For Wire Gauge

	Diameter Diameter

430 Products

Nuts

Plastic Hex Nuts

Plastic nuts are chemical resistant, nonconductive, and lightweight.

Ceramic Hex Nuts

Ceramic nuts won't melt, seize, or become brittle—even at temperatures up to 3000° F.

Thin Hex Nuts

Also known as jam nuts, these are about half the height of standard hex nuts. Use them in low-clearance applications or jam one against another nut to hold it in place.

Flange Nuts

The flange distributes pressure where the nut meets the material surface, eliminating the need for a separate washer.

Square Nuts

Large flat sides make these nuts easy to grip with a wrench and keep them from rotating in channels and square holes.

Cap Nuts

Cover and protect threads while providing a finished appearance.

Thumb Nuts

Thumb nuts provide a secure grip for tightening and loosening by hand.

Coupling Nuts

Also known as extension nuts, use these to connect and extend threaded rods. They’re about three times taller than standard hex nuts.

Other Nonmetallic Nuts

Push-On Retaining Caps

Use these caps to hold components in place and protect shaft ends.

Binding Barrels and Screws

Use these as a low-profile alternative to standard nut and bolt combinations.

Conduit Fitting Locknuts

Secure threaded conduit fittings to a knockout in an outlet box or enclosure.

Wire Splice and Tap Assortments

No crimping or wire stripping needed—this assortment includes twist-on wire connectors and insulation-piercing wire taps.

Twist-On Wire Splicing Connectors

Make a quick, secure wire connection without crimping.

Sink Drain Trap Fittings

Precision Lead Screws and Nuts

Pair with a motor in automated motion and positioning applications. A tight thread fit allows these lead screws and nuts to make accurate, repeatable starts and stops. Compared to ball screws and nuts, they're quieter and better for shock loads.

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