Thumb Jam Nuts | McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Thumb Nut Profile Thumb Nut Profile


Flanged	Low

Standard

	Material Material

	Head Diameter Head Diameter

	Nut Type Nut Type	Show

	Thumb

	Nut Type Nut Type	Hide


Hex	Locknut

Panel	Thumb

Round	Flange

Square

	Thumb Nut Head Shape Thumb Nut Head Shape


Round	Hex

	Height Height

	Thread Direction Thread Direction

	Right Hand

	Collar Diameter Collar Diameter

	Collar Height Collar Height

	Finish Finish

Black Oxide

Passivated

Zinc Plated

	Thread Type Thread Type

Metric

UNC

UNF

	Thread Pitch Thread Pitch

	Thread Spacing Thread Spacing

Coarse

Fine

	Thread Fit Thread Fit

Class 2B

Class 6H

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	Width Width

	Threading Threading

	Fully Threaded
	Partially Threaded

	Hole Diameter Hole Diameter

	Color Color

	Black

	Drive Style Drive Style

	External Hex

	Maximum Temperature Maximum Temperature

180° F

200° F

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298 Products

About Nuts, Materials, and Finishes

Steel High-Torque Low-Profile Thumb Nuts

These nuts have a black-oxide finish for mild corrosion resistance in dry environments.

Stainless Steel High-Torque Low-Profile Thumb Nuts

Stainless steel thumb nuts have excellent corrosion resistance in most environments.

Low-Profile Thumb Nuts

Use these thumb nuts in low-clearance applications or jam one against another nut to hold it in place.

18-8 Stainless Steel Flanged Knurled-Head Thumb Nuts

These thumb nuts have good chemical resistance. The flange distributes pressure over a large area to reduce stress on your part.

Metric 18-8 Stainless Steel
Flanged Knurled-Head Thumb Nuts

These metric thumb nuts have good chemical resistance. The flange distributes pressure over a large area to reduce stress on your part.

Super-Corrosion-Resistant 316 Stainless
Steel Flanged Knurled-Head Thumb Nuts

More corrosion resistant than 18-8 stainless steel thumb nuts, these have excellent resistance to chemicals and salt water.

Metric Brass Flanged Knurled-Head Thumb Nuts

These metric thumb nuts are corrosion resistant in wet environments, electrically conductive, and nonmagnetic. The flange distributes pressure over a large area to reduce stress on your part.

Brass Flanged Knurled-Head Thumb Nuts

These thumb nuts are corrosion resistant in wet environments, electrically conductive, and nonmagnetic. The flange distributes pressure over a large area to reduce stress on your part.

18-8 Stainless Steel Knurled-Head Thumb Nuts

These thumb nuts have good chemical resistance and may be mildly magnetic.

Metric 18-8 Stainless Steel Knurled-Head Thumb Nuts

Made from 18-8 stainless steel, these metric thumb nuts have good chemical resistance and may be mildly magnetic.

Super-Corrosion-Resistant 316 Stainless
Steel Knurled-Head Thumb Nuts

More corrosion resistant than 18-8 stainless steel thumb nuts, these have excellent resistance to chemicals and salt water.

Reinforced Plastic Knurled-Head Thumb Nuts

These thumb nuts have an aluminum insert to withstand more torque than plastic thumb nuts during installation.

Plastic Knurled-Head Thumb Nuts

These nylon thumb nuts are chemical resistant, nonconductive, and lightweight.

Hex-Head Thumb Nuts

Tighten these thumb nuts with a wrench for more torque while fastening.

About Nuts, Materials, and Finishes

Knurled-Head Thumb Nuts

Steel High-Torque Low-Profile Thumb Nuts

Stainless Steel High-Torque Low-Profile Thumb Nuts

Low-Profile Thumb Nuts

18-8 Stainless Steel Flanged Knurled-Head Thumb Nuts

Metric 18-8 Stainless SteelFlanged Knurled-Head Thumb Nuts

Super-Corrosion-Resistant 316 StainlessSteel Flanged Knurled-Head Thumb Nuts

Metric Brass Flanged Knurled-Head Thumb Nuts

Brass Flanged Knurled-Head Thumb Nuts

18-8 Stainless Steel Knurled-Head Thumb Nuts

Metric 18-8 Stainless Steel Knurled-Head Thumb Nuts

Super-Corrosion-Resistant 316 StainlessSteel Knurled-Head Thumb Nuts

Reinforced Plastic Knurled-Head Thumb Nuts

Plastic Knurled-Head Thumb Nuts

Hex-Head Thumb Nuts

Hex-Head Thumb Nuts

Metric 18-8 Stainless Steel
Flanged Knurled-Head Thumb Nuts

Super-Corrosion-Resistant 316 Stainless
Steel Flanged Knurled-Head Thumb Nuts

Super-Corrosion-Resistant 316 Stainless
Steel Knurled-Head Thumb Nuts