Acme Screws | McMaster-Carr

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	Thread Type Thread Type

Acme

Metric Rounded
Trapezoidal

Metric Trapezoidal

Rounded Acme

	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Component Component

	Collar
	Handle
	Hex Head Screw
	Lead Screw
	Nut

	Length Length

	Material Material

	Thread Direction Thread Direction

	Right Hand
	Left Hand
	Right Hand and Left Hand

	Nut Type Nut Type


Coupling	Externally Threaded

Flange	Hex

Platform	Round

Square	Thumb

	Threading Threading


Fully Threaded	Partially Threaded

	Number of Thread Starts Number of Thread Starts

	Travel Distance per Turn Travel Distance per Turn

	Thread Pitch Thread Pitch

	Speed Ratio Speed Ratio

	Tensile Strength Tensile Strength

	Hardness Hardness

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

RoHS Compliant

RoHS Compliant with
Exemptions

	Thread Fit Thread Fit

Class 2C

Class 2G

	Diameter Diameter

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

DFARS Specialty Metals
Compliant

DFARS Specialty Metals
COTS-Exempt

	Head Type Head Type

	Hex

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

REACH Compliant

	Fastener Strength Grade/Class Fastener Strength Grade/Class

1,749 Products

Selecting Compatible Lead Screws and Nuts

Precision Acme Lead Screws and Nuts

Also known as single-start and self-locking lead screws and nuts, these have a single thread that runs the length of the screw. The nut travels only when the screw turns, so your system won't unexpectedly move when the lead screw is at rest.

Fast-Travel Precision Acme Lead Screws and Nuts

Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start.

Metric Precision Lead Screws and Nuts

Also known as trapezoidal-thread lead screws and nuts.

Ultra-Precision Lead Screws and Nuts

Fast-Travel Ultra-Precision Lead Screws and Nuts

Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start.

Metric Fast-Travel Ultra-Precision
Lead Screws and Nuts

Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start.

Metric Ultra-Precision Lead Screws and Nuts

Acme Lead Screws and Nuts

Found in hand-powered clamps, vises, grates, doors, and work tables, lead screws and nuts have broad, square threads that are well suited for quick assembly, high clamping forces, and lifting and lowering heavy objects.

Metric Lead Screws and Nuts

These metric lead screws and nuts have broad, square threads that are well suited for quick assembly, high clamping forces, and lifting and lowering heavy objects. They're commonly found in hand-powered clamps, vises, grates, doors, and work tables.

Clamping Acme Lead Screw Collars

Thread these one-piece collars onto an Acme lead screw.

Two-Piece Clamping Acme Lead Screw Collars

Mount these two-piece collars anywhere on an Acme lead screw without removing components.

Metric Clamping Lead Screw Collars

Install these threaded collars on a metric lead screw to separate and position components, or use them as an end stop to limit travel.

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Selecting Compatible Lead Screws and Nuts