McMaster-Carr

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. To ensure compatibility, please select components that have the same thread direction, size, and pitch. Class 7E and 7H components are compatible.

Black-oxide carbon steel components have mild corrosion resistance. 932 bearing bronze components are more wear resistant than brass components. They have good machinability and fair corrosion resistance.

Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

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

Lead Screws—Right-Hand Threaded

Black-Oxide Carbon Steel
Thread Size	Thread Pitch, mm	Lg., mm	No. of Thread Starts	Speed Ratio	Travel Distance per Turn, mm	Thread Fit	Fastener Strength Grade/Class	Hardness	Specifications Met		Each
M26	5	1,000	1	1:1	5	Class 7E	Grade 2	Not Rated	ASTM A108, ASTM A193, DIN 103	000000000	000000
M26	5	2,000	1	1:1	5	Class 7E	Grade 2	Rockwell B72	ASTM A108	000000000	000000

Flange Nuts—Right-Hand Threaded

Flange nuts move objects along the length of a lead screw. They have a wide machinable flange for custom mounting.

				Flange
Thread Size	Thread Pitch, mm	Ht., mm	Dia., mm	Dia., mm	Thick., mm	No. of Thread Starts	Speed Ratio	Travel Distance per Turn, mm	Thread Fit	Hardness		Each
932 Bearing Bronze
M26	5	46	38	62	14	1	1:1	5	Class 7H	Not Rated	000000000	0000000

Hex Nuts—Right-Hand Threaded

Hex nuts fasten and position lead screw components.

Carbon Steel
Thread Size	Thread Pitch, mm	Ht., mm	Wd., mm	No. of Thread Starts	Speed Ratio	Travel Distance per Turn, mm	Thread Fit	Fastener Strength Grade/Class	Hardness		Each
M26	5	25.4	41.3	1	1:1	5	Class 7H	Grade 2	Not Rated	000000000	000000

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Selecting Compatible Lead Screws and Nuts

Metric Acme Lead Screws and Nuts