M3 Lead Screws | McMaster-Carr

Filter by

System of Measurement

Thread Pitch

Component

Travel Distance per Turn

Length

Number of Thread Starts

Thread Type

Metric

Metric Rounded Trapezoidal

Nut Type

Construction

Speed Ratio

Material

17-4 PH Stainless Steel

Width

Thread Direction

Threading

Shaft Type

Shaft Diameter

Diameter

Clamping Screw Length

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

DFARS Specialty Metals

Exempt

Not Compliant

REACH

Compliant

Export Control Classification Number (ECCN)

RoHS

Hardness

25 Products

Metric Fast-Travel Ultra-Precision Lead Screws and Nuts


	Style C	Style D

Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start. Operating with less backlash (play) than Metric Precision Acme Lead Screws and Nuts, these lead screws and nuts provide increased nut life and more reliable movement in automated systems. To ensure compatibility, select components that have the same thread size and number of thread starts.

Lead Screw—Right-Hand Thread

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

	Lg., mm	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Hardness	Tensile Strength, psi		Each
17-4 PH Stainless Steel



	M3 × 0.5 mm	145	Metric Rounded Trapezoidal	2:1	2	1	±0.15 mm/300 mm	Rockwell C35	145,000	4537N104	0000000


	M3 × 0.5 mm	145	Metric Rounded Trapezoidal	6:1	6	3	±0.15 mm/300 mm	Rockwell C35	145,000	4537N105	000000
	M3 × 0.5 mm	145	Metric Rounded Trapezoidal	12:1	12	6	±0.15 mm/300 mm	Rockwell C35	145,000	4537N106	000000

Lead Screw with One Machinable End—Right-Hand Thread

Image of Product. Front orientation. Precision Lead Screws and Nuts. Metric Fast-Travel Ultra-Precision Lead Screws and Nuts, Lead Screw with One Machinable End—Right-Hand Thread.

Lead screws with one machinable end let you create your own custom connection to suit your application.

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

				End, mm
	Thread Size	Lg., mm	Thread Type	Dia.	Lg.	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Hardness	Tensile Strength, psi		Each
17-4 PH Stainless Steel



		M3 × 0.5 mm	150	Metric Rounded Trapezoidal	7	25	2:1	2	1	±0.15 mm/300 mm	Rockwell C35	145,000	4537N124	0000000


		M3 × 0.5 mm	150	Metric Rounded Trapezoidal	7	25	6:1	6	3	±0.15 mm/300 mm	Rockwell C35	145,000	4537N125	000000
		M3 × 0.5 mm	150	Metric Rounded Trapezoidal	7	25	12:1	12	6	±0.15 mm/300 mm	Rockwell C35	145,000	4537N126	000000

Lead Screw with One Coupling End—Right-Hand Thread

Lead screws with one coupling end connect directly with your shaft without extra machining. Torque down the locknut once inserted.

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

				End, mm
	Thread Size	Lg., mm	Thread Type	Dia.	Lg.	For Shaft Dia.	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Hardness	Tensile Strength, psi		Each
17-4 PH Stainless Steel



		M3 × 0.5 mm	150	Metric Rounded Trapezoidal	7.5	15.5	3	2:1	2	1	±0.15 mm/300 mm	Rockwell C35	145,000	4537N144	0000000


		M3 × 0.5 mm	150	Metric Rounded Trapezoidal	7.5	15.5	3	6:1	6	3	±0.15 mm/300 mm	Rockwell C35	145,000	4537N145	000000
		M3 × 0.5 mm	150	Metric Rounded Trapezoidal	7.5	15.5	3	12:1	12	6	±0.15 mm/300 mm	Rockwell C35	145,000	4537N146	000000

Externally Threaded Nuts—Right-Hand Thread

Style C

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

										External Thread
	Style	Thread Size	Lg.	Wd.	Ht.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Size	Lg.	Hardness	Tensile Strength	Dynamic Thrust Load Cap., lb.		Each
PEEK



		C	M3 × 0.5 mm	13/32"	0.311"	0.276"	Metric Rounded Trapezoidal	2:1	2	1	M7 × 0.75 mm	5/32"	Durometer 83D	Not Rated	4	4537N164	000000


		C	M3 × 0.5 mm	13/32"	0.311"	0.276"	Metric Rounded Trapezoidal	6:1	6	3	M7 × 0.75 mm	5/32"	Durometer 83D	Not Rated	4	4537N165	00000

Flange Nuts—Right-Hand Thread


Style D	Style D

Wear-Compensating Internal O-Ring—Flange nuts with a wear-compensating internal O-ring resist backlash to keep the nuts in place and maintain a tight fit even when their threads begin to wear. They’re often used in 3D printing and robotic applications.

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

					Flange
	Style	Thread Size	Lg.	Dia.	Wd.	Ht.	Thk.	Thread Type	Speed Ratio	Bolt Circle Dia.	No. of Thread Starts	Travel Distance per Turn, mm	Hardness	Tensile Strength	Dynamic Thrust Load Cap., lb.	No. of Mounting Holes		Each
PEEK



		D	M3 × 0.5 mm	21/64"	0.295"	39/64"	5/16"	3/32"	Metric Rounded Trapezoidal	2:1	15/32"	2	1	Durometer 83D	Not Rated	4	2	4537N184	000000


		D	M3 × 0.5 mm	21/64"	0.295"	39/64"	5/16"	3/32"	Metric Rounded Trapezoidal	6:1	15/32"	6	3	Durometer 83D	Not Rated	4	2	4537N185	00000
		D	M3 × 0.5 mm	21/64"	0.295"	39/64"	5/16"	3/32"	Metric Rounded Trapezoidal	12:1	15/32"	12	6	Durometer 83D	Not Rated	4	2	4537N186	00000


		PEEK with Wear-Compensating Internal O-Ring



				D	M3 × 0.5 mm	25/64"	0.315"	39/64"	5/16"	3/32"	Metric Rounded Trapezoidal	2:1	15/32"	2	1	Durometer 83D	Not Rated	2	2	4537N204	00000


				D	M3 × 0.5 mm	25/64"	0.315"	39/64"	5/16"	3/32"	Metric Rounded Trapezoidal	6:1	15/32"	6	3	Durometer 83D	Not Rated	2	2	4537N205	00000
				D	M3 × 0.5 mm	25/64"	0.315"	39/64"	5/16"	3/32"	Metric Rounded Trapezoidal	12:1	15/32"	12	6	Durometer 83D	Not Rated	2	2	4537N206	00000

Metric Clamping Lead Screw Collars

Thread these one-piece collars onto a metric lead screw to separate and position components, or use them as an end stop to limit travel. Made of black-oxide steel, they have mild corrosion resistance. Tighten the clamping screws to secure.

To ensure compatibility, please select a collar that has the same thread type, direction, size, pitch, and number of thread starts as your lead screw.

	No. of Thread Starts	Hardness		Each
Right-Hand Thread







	Black-Oxide 1215 Carbon Steel

	M8 × 1.5 mm	18	9	1	Brinell 167	2198N101	000000


	M10 × 2 mm	24	9	1	Brinell 167	2198N11	00000

Metric Ultra-Precision Lead Screws and Nuts


	Style B	Style C

Operating with less backlash (play) than Metric Precision Acme Lead Screws and Nuts, these provide increased nut life and more reliable movement in automated systems. Also known as single-start and self-locking lead screws and nuts, they 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. To ensure compatibility, select components that have the same thread size, thread type, thread size, thread pitch, and number of thread starts.

Lead Screw—Right-Hand Thread

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

	Lg., mm	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Hardness	Tensile Strength, psi		Each
17-4 PH Stainless Steel



	M3 × 0.5 mm	145	Metric Rounded Trapezoidal	1:1	1	0.5	±0.15 mm/300 mm	Rockwell C35	145,000	90500A120	0000000

Lead Screw with One Machinable End—Right-Hand Thread

Image of Product. Front orientation. Precision Lead Screws and Nuts. Metric Ultra-Precision Lead Screws and Nuts, Lead Screw with One Machinable End—Right-Hand Thread.

Lead screws with one machinable end let you create your own custom connection to suit your application.

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

				End, mm
	Thread Size	Lg., mm	Thread Type	Dia.	Lg.	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Hardness	Tensile Strength, psi		Each
17-4 PH Stainless Steel



		M3 × 0.5 mm	150	Metric Rounded Trapezoidal	7	25	1:1	1	0.5	±0.15 mm/300 mm	Rockwell C35	145,000	90500A150	0000000

Lead Screw with One Coupling End—Right-Hand Thread

Image of Product. Front orientation. Precision Lead Screws and Nuts. Metric Ultra-Precision Lead Screws and Nuts, Lead Screw with One Coupling End—Right-Hand Thread.

Lead screws with one coupling end connect directly with your shaft without extra machining. Torque down the locknut once inserted.

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

				End, mm
	Thread Size	Lg., mm	Thread Type	Dia.	Lg.	For Shaft Dia.	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Hardness	Tensile Strength, psi		Each
17-4 PH Stainless Steel



		M3 × 0.5 mm	150	Metric Rounded Trapezoidal	7.5	15.5	3	1:1	1	0.5	±0.15 mm/300 mm	Rockwell C35	145,000	90500A180	0000000

Externally Threaded Nuts—Right-Hand Thread

Style B

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

										External Thread
	Style	Thread Size	Lg.	Wd.	Ht.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Size	Lg.	Hardness	Tensile Strength	Dynamic Thrust Load Cap., lb.		Each
PEEK



		B	M3 × 0.5 mm	13/32"	0.311"	0.276"	Metric Rounded Trapezoidal	1:1	1	0.5	M7 × 0.75 mm	5/32"	Durometer 83D	Not Rated	5	90500A230	000000

Flange Nuts—Right-Hand Thread


Style C	Style C

Wear-Compensating Internal O-Ring—Flange nuts with wear-compensating internal O-ring maintain a tight fit even when their threads begin to wear. They resist backlash to maintain accuracy over time, which is important in positioning applications such as 3D printing and robotics.

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

					Flange
	Style	Thread Size	Lg.	Dia.	Wd.	Ht.	Thk.	Thread Type	Speed Ratio	Bolt Circle Dia.	No. of Thread Starts	Travel Distance per Turn, mm	Hardness	Tensile Strength	Dynamic Thrust Load Cap., lb.	No. of Mounting Holes		Each
PEEK



		C	M3 × 0.5 mm	21/64"	0.295"	39/64"	5/16"	3/32"	Metric Rounded Trapezoidal	1:1	15/32"	1	0.5	Durometer 83D	Not Rated	5	2	90500A260	000000


		PEEK with Wear-Compensating Internal O-Ring



				C	M3 × 0.5 mm	25/64"	0.315"	39/64"	5/16"	3/32"	Metric Rounded Trapezoidal	1:1	15/32"	1	0.5	Durometer 83D	Not Rated	2	2	90500A290	000000