Plastic Jam Nuts | McMaster-Carr

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	Locking Type Locking Type

	Nylon Insert

	Material Material

Steel

Stainless Steel

Plastic

	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Thread Pitch Thread Pitch

	Nut Type Nut Type


Hex	Locknut

Thumb

	Hex Nut Profile Hex Nut Profile


Thin	Standard

Extra-Wide Thin

	Height Height

	Width Width

	Finish Finish

Black Phosphate

Black Zinc Plated

Cadmium Yellow-Chromate
Plated

Corrosion-Resistant-Coated

Zinc Plated

Zinc Yellow-Chromate Plated

	Thread Direction Thread Direction

	Right Hand

	Thread Type Thread Type

	Pipe Size Pipe Size

	Thread Spacing Thread Spacing

Coarse

Fine

Extra Fine

	Fastener Strength Grade/Class Fastener Strength Grade/Class

Grade 5

Grade 8

ASTM Grade C

	Drive Style Drive Style

	External Hex

	Thread Fit Thread Fit

Class 2B

Class 6H

Class 3B

	Insert Maximum Temperature Insert Maximum Temperature

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

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

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Specifications Met Specifications Met

ISO

NAS

Mil. Spec.

	Color Color

	Black
	Off-White

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220 Products

About Nuts, Materials, and Finishes

Plastic Thin Hex Nuts

Plastic nuts are chemical resistant, nonconductive, and lightweight.

Metric Low-Profile Low-Strength
Steel Nylon-Insert Locknuts

With a shorter hex height than standard DIN 985 locknuts, these nylon-insert locknuts meet international ISO 10511 dimensional standards and are easy to install in tight spaces.

Low-Strength Steel Thin Nylon-Insert Locknuts

These locknuts are about half the height of standard nylon-insert locknuts. Use them in light duty low clearance applications or jam one against a hex nut to hold it in place.

Mil. Spec. Low-Strength Steel
Thin Nylon-Insert Locknuts

Choose these locknuts for their adherence to strict military standards for material and construction.

High-Strength Steel Thin Nylon-Insert Locknuts

These Grade 8 locknuts are about 25% stronger than medium-strength steel thin locknuts.

Medium-Strength Steel Thin Nylon-Insert Locknuts

Grade 5 locknuts are suitable for fastening most machinery and equipment when used in conjunction with a standard hex nut.

18-8 Stainless Steel Thin Nylon-Insert Locknuts

These locknuts have good chemical resistance and may be mildly magnetic.

Mil. Spec. 18-8 Stainless Steel
Thin Nylon-Insert Locknuts

Choose these locknuts for their adherence to strict military standards for material and construction.

Super-Corrosion-Resistant 316 Stainless
Steel Thin Nylon-Insert Locknuts

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

High-Strength Steel Extra-Wide
Thin Nylon-Insert Locknuts

Comparable in strength to Grade 8 bolts, these locknuts are about three times stronger than low-strength steel extra-wide thin locknuts.

Low-Strength Steel Extra-Wide
Thin Nylon-Insert Locknuts

Use these locknuts for light duty fastening applications, such as securing access panels.

18-8 Stainless Steel Extra-Wide
Thin Nylon-Insert Locknuts

These locknuts have good chemical resistance.

Super-Corrosion-Resistant 316 Stainless
Steel Extra-Wide Thin Nylon-Insert Locknuts

More corrosion resistant than 18-8 stainless steel locknuts, 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.

Locknuts for Plastic Conduit Fittings

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

About Nuts, Materials, and Finishes

Nuts

Plastic Thin Hex Nuts

Metric Low-Profile Low-StrengthSteel Nylon-Insert Locknuts

Low-Strength Steel Thin Nylon-Insert Locknuts

Mil. Spec. Low-Strength SteelThin Nylon-Insert Locknuts

High-Strength Steel Thin Nylon-Insert Locknuts

Medium-Strength Steel Thin Nylon-Insert Locknuts

18-8 Stainless Steel Thin Nylon-Insert Locknuts

Mil. Spec. 18-8 Stainless SteelThin Nylon-Insert Locknuts

Super-Corrosion-Resistant 316 StainlessSteel Thin Nylon-Insert Locknuts

High-Strength Steel Extra-WideThin Nylon-Insert Locknuts

Low-Strength Steel Extra-WideThin Nylon-Insert Locknuts

18-8 Stainless Steel Extra-WideThin Nylon-Insert Locknuts

Super-Corrosion-Resistant 316 StainlessSteel Extra-Wide Thin Nylon-Insert Locknuts

Reinforced Plastic Knurled-Head Thumb Nuts

Plastic Knurled-Head Thumb Nuts

Locknuts for Plastic Conduit Fittings

Locknuts for Plastic Conduit Fittings

Metric Low-Profile Low-Strength
Steel Nylon-Insert Locknuts

Mil. Spec. Low-Strength Steel
Thin Nylon-Insert Locknuts

Mil. Spec. 18-8 Stainless Steel
Thin Nylon-Insert Locknuts

Super-Corrosion-Resistant 316 Stainless
Steel Thin Nylon-Insert Locknuts

High-Strength Steel Extra-Wide
Thin Nylon-Insert Locknuts

Low-Strength Steel Extra-Wide
Thin Nylon-Insert Locknuts

18-8 Stainless Steel Extra-Wide
Thin Nylon-Insert Locknuts

Super-Corrosion-Resistant 316 Stainless
Steel Extra-Wide Thin Nylon-Insert Locknuts