Metric Lead Screw Nuts | McMaster-Carr

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Number of Mounting Holes

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Less than 1,000 lb.

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Metric Trapezoidal Class 7H

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10,000 psi to 19,999 psi

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102 Products

Metric Precision Lead Screws and Nuts

Pair with a motor in automated motion and positioning applications. A tight thread fit allows these lead screws and nuts to make accurate, repeatable starts and stops. 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 direction, size, and number of thread starts.

Round Nuts—Right-Hand Thread

932 Bearing Bronze—932 bearing bronze and 673 bronze nuts are wear resistant. They have good machinability and fair corrosion resistance.

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.	Dia.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Thread Fit	Hardness	Tensile Strength, psi	Dynamic Thrust Load Cap., lb.	Specs. Met		Each
932 Bearing Bronze



	M10 × 2 mm	3/4"	0.75"	Metric Trapezoidal	1:1	1	2	Metric Trapezoidal Class 7H	Brinell 70	Not Rated	670	DIN 103	7549K32	000000


	M12 × 3 mm	1"	0.875"	Metric Trapezoidal	1:1	1	3	Metric Trapezoidal Class 7H	Brinell 70	Not Rated	1,100	DIN 103	7549K33	00000
	M16 × 3 mm	1 1/8"	1.125"	Metric Trapezoidal	1:1	1	3	Metric Trapezoidal Class 7H	Brinell 70	Not Rated	2,000	DIN 103	7549K35	00000
	M20 × 4 mm	1 1/2"	1.25"	Metric Trapezoidal	1:1	1	4	Metric Trapezoidal Class 7H	Brinell 70	Not Rated	3,100	DIN 103	7549K37	00000
	M24 × 5 mm	2"	1.75"	Metric Trapezoidal	1:1	1	5	Metric Trapezoidal Class 7H	Brinell 70	Not Rated	4,500	DIN 103	7549K38	00000
	M28 × 5 mm	2"	1.75"	Metric Trapezoidal	1:1	1	5	Metric Trapezoidal Class 7H	Brinell 69	44,000	6,100	DIN 103	7549K87	00000
	M40 × 7 mm	3"	2.5"	Metric Trapezoidal	1:1	1	7	Metric Trapezoidal Class 7H	Brinell 70	Not Rated	12,300	DIN 103	7549K43	00000

Externally Threaded Nuts—Right-Hand Thread

Image of Product. Front orientation. Contains Annotated. Precision Lead Screws and Nuts. Metric Precision Lead Screws and Nuts, Externally Threaded Nuts—Right-Hand Thread.

Manganese Bronze—Manganese bronze nuts have good strength and wear resistance.

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
	Thread Size	Lg.	Dia.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Size	Lg.	Thread Fit	Hardness	Tensile Strength, psi	Dynamic Thrust Load Cap., lb.	Specs. Met		Each
Manganese Bronze



		M10 × 2 mm	5/8"	0.68"	Metric Trapezoidal	1:1	1	2	9/16"-18	3/8"	Metric Trapezoidal Class 7H	Brinell 126	75,000	670	DIN 103	7549K88	000000


		M12 × 3 mm	3/4"	1.125"	Metric Trapezoidal	1:1	1	3	15/16"-16	1/2"	Metric Trapezoidal Class 7H	Brinell 126	75,000	1,100	DIN 103	7549K89	00000
		M16 × 3 mm	1"	1.125"	Metric Trapezoidal	1:1	1	3	15/16"-16	1/2"	Metric Trapezoidal Class 7H	Brinell 126	75,000	2,000	DIN 103	7549K91	00000
		M20 × 4 mm	1 1/4"	1.125"	Metric Trapezoidal	1:1	1	4	1"-18	1/2"	Metric Trapezoidal Class 7H	Brinell 126	75,000	3,100	DIN 103	7549K92	00000
		M24 × 5 mm	1 1/2"	1.5"	Metric Trapezoidal	1:1	1	5	1 3/8"-16	1/2"	Metric Trapezoidal Class 7H	Brinell 126	75,000	4,500	DIN 103	7549K93	000000
		M28 × 5 mm	1 3/4"	2.125"	Metric Trapezoidal	1:1	1	5	1 31/32"-18	13/16"	Metric Trapezoidal Class 7H	Brinell 126	75,000	6,100	DIN 103	7549K94	000000
		M40 × 7 mm	2 19/64"	2.125"	Metric Trapezoidal	1:1	1	7	1 31/32"-18	13/16"	Metric Trapezoidal Class 7H	Brinell 126	75,000	12,300	DIN 103	7549K95	000000

Flange Nuts—Right-Hand Thread

Manganese Bronze—Manganese bronze nuts have good strength and wear resistance.

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
	Thread Size	Lg.	Dia.	Dia.	Thk.	Thread Type	Speed Ratio	Bolt Circle Dia.	No. of Thread Starts	Travel Distance per Turn, mm	Thread Fit	Hardness	Tensile Strength, psi	Dynamic Thrust Load Cap., lb.	No. of Mounting Holes	Specs. Met		Each
Manganese Bronze



		M10 × 2 mm	5/8"	0.688"	1 39/64"	13/32"	Metric Trapezoidal	1:1	1 1/8"	1	2	Metric Trapezoidal Class 7H	Brinell 126	Not Rated	670	4	DIN 103	7549K16	000000


		M12 × 3 mm	3/4"	1.125"	2 39/64"	17/32"	Metric Trapezoidal	1:1	2 3/32"	1	3	Metric Trapezoidal Class 7H	Brinell 126	Not Rated	1,100	4	DIN 103	7549K17	00000
		M16 × 3 mm	1"	1.125"	2 39/64"	17/32"	Metric Trapezoidal	1:1	2 3/32"	1	3	Metric Trapezoidal Class 7H	Brinell 126	Not Rated	2,000	4	DIN 103	7549K19	00000
		M20 × 4 mm	1 1/4"	1.125"	2 39/64"	17/32"	Metric Trapezoidal	1:1	2 3/32"	1	4	Metric Trapezoidal Class 7H	Brinell 126	Not Rated	3,100	4	DIN 103	7549K22	00000
		M24 × 5 mm	1 1/2"	1.5"	2 3/4"	33/64"	Metric Trapezoidal	1:1	2 17/64"	1	5	Metric Trapezoidal Class 7H	Brinell 126	Not Rated	4,500	4	DIN 103	7549K23	00000
		M28 × 5 mm	1 3/4"	2.125"	4 13/64"	53/64"	Metric Trapezoidal	1:1	3 7/16"	1	5	Metric Trapezoidal Class 7H	Brinell 126	75,000	6,100	4	DIN 103	7549K86	000000
		M40 × 7 mm	2 19/64"	2.125"	4 13/64"	53/64"	Metric Trapezoidal	1:1	3 7/16"	1	7	Metric Trapezoidal Class 7H	Brinell 126	Not Rated	12,300	4	DIN 103	7549K27	000000

Metric Fast-Travel Ultra-Precision Lead Screws and Nuts

Image of ProductInUse. Front orientation. Contains Inset. Precision Lead Screws and Nuts. Metric Fast-Travel Ultra-Precision Lead Screws and Nuts.


Style A	Style B	Style C	Style D	Style E	Style F

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.

Round Nuts—Right-Hand Thread

Style A

Acetal—Acetal nuts have good wear and corrosion resistance.

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.

	Thread Size	Lg.	Dia.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Hardness	Tensile Strength, psi	Dynamic Thrust Load Cap.	Temp., ° F		Each
Acetal



	A	M8 × 2.5 mm	15/32"	0.709"	Metric Rounded Trapezoidal	4:1	4	10	Durometer 74D	10,000	Not Rated	-40 to 185	2391N17	000000


	A	M10 × 3 mm	25/32"	0.866"	Metric Rounded Trapezoidal	4:1	4	12	Durometer 74D	10,000	Not Rated	-40 to 185	2391N18	00000
	A	M12 × 2.5 mm	15/16"	1.024"	Metric Rounded Trapezoidal	2:1	2	5	Durometer 74D	10,000	Not Rated	-40 to 185	2391N19	00000
	A	M16 × 5 mm	1 17/64"	1.417"	Metric Rounded Trapezoidal	7:1	7	35	Durometer 74D	10,000	Not Rated	-40 to 185	2391N21	00000
	A	M20 × 5 mm	1 37/64"	1.772"	Metric Rounded Trapezoidal	4:1	4	20	Durometer 74D	10,000	Not Rated	-40 to 185	2391N22	00000
	A	M20 × 7.5 mm	1 37/64"	1.772"	Metric Rounded Trapezoidal	8:1	8	60	Durometer 74D	10,000	Not Rated	-40 to 185	2391N23	00000

Externally Threaded Nuts—Right-Hand Thread


Style B	Style C

Acetal—Acetal nuts have good wear and corrosion resistance.

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.	Dia.	Hex Wd.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Size	Lg.	Hardness	Tensile Strength, psi	Dynamic Thrust Load Cap., lb.	Temp., ° F		Each
Acetal



		B	M2 × 0.5 mm	11/16"	—	—	0.297"	7/16"	Metric Rounded Trapezoidal	2:1	2	1	3/8"-24	3/16"	Not Rated	8,000	10	-40 to 185	97783A190	000000


		B	M4 × 1.25 mm	11/16"	—	—	0.297"	7/16"	Metric Rounded Trapezoidal	8:1	8	10	3/8"-24	3/16"	Not Rated	8,000	25	-40 to 185	97783A210	00000
		B	M5 × 1.25 mm	11/16"	—	—	0.297"	7/16"	Metric Rounded Trapezoidal	4:1	4	5	3/8"-24	3/16"	Not Rated	8,000	25	-40 to 185	97783A220	00000
		B	M8 × 2 mm	1"	—	—	0.548"	11/16"	Metric Rounded Trapezoidal	2:1	2	4	5/8"-18	1/4"	Not Rated	8,000	75	-40 to 185	97783A230	00000


		PEEK



				C	M2 × 0.4 mm	5/16"	0.22"	0.197"	—	—	Metric Rounded Trapezoidal	2:1	2	0.75	M5 × 0.8 mm	9/64"	Durometer 83D	Not Rated	2	—	4537N161	00000


				C	M2 × 0.4 mm	5/16"	0.22"	0.197"	—	—	Metric Rounded Trapezoidal	4:1	4	1.5	M5 × 0.8 mm	9/64"	Durometer 83D	Not Rated	2	—	4537N162	00000
				C	M2 × 0.4 mm	5/16"	0.22"	0.197"	—	—	Metric Rounded Trapezoidal	8:1	8	3	M5 × 0.8 mm	9/64"	Durometer 83D	Not Rated	2	—	4537N163	00000
				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	00000
				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
				C	M4 × 1 mm	1/2"	0.402"	0.354"	—	—	Metric Rounded Trapezoidal	4:1	4	4	M9 × 1 mm	13/64"	Durometer 83D	Not Rated	4	—	4537N166	00000
				C	M4 × 1 mm	1/2"	0.402"	0.354"	—	—	Metric Rounded Trapezoidal	8:1	8	8	M9 × 1 mm	13/64"	Durometer 83D	Not Rated	10	—	4537N167	00000

Flange Nuts—Right-Hand Thread


Style D	Style E	Style F


Style D	Style E	Style F

Acetal—Acetal nuts have good wear and corrosion resistance.

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.	Dia.	Wd.	Ht.	Thk.	Thread Type	Speed Ratio	Bolt Circle Dia.	No. of Thread Starts	Travel Distance per Turn, mm	Hardness	Tensile Strength, psi	Dynamic Thrust Load Cap., lb.	No. of Mounting Holes	Temp., ° F		Each
Acetal



		D	M2 × 0.5 mm	1/2"	0.297"	—	3/4"	13/32"	1/8"	Metric Rounded Trapezoidal	2:1	39/64"	2	1	Not Rated	8,000	10	2	-40 to 185	97783A240	000000


		D	M4 × 1.25 mm	1/2"	0.297"	—	3/4"	13/32"	1/8"	Metric Rounded Trapezoidal	8:1	39/64"	8	10	Not Rated	8,000	25	2	-40 to 185	97783A250	00000
		D	M5 × 1.25 mm	1/2"	0.297"	—	3/4"	13/32"	1/8"	Metric Rounded Trapezoidal	4:1	39/64"	4	5	Not Rated	8,000	25	2	-40 to 185	97783A260	00000
		E	M8 × 2 mm	3/4"	0.548"	1 1/8"	—	—	3/16"	Metric Rounded Trapezoidal	2:1	7/8"	2	4	Not Rated	8,000	75	3	-40 to 185	97783A270	00000
		F	M8 × 2.5 mm	25/32"	0.787"	1 27/64"	—	—	5/16"	Metric Rounded Trapezoidal	4:1	1 7/64"	4	10	Durometer 74D	10,000	Not Rated	6	-40 to 185	2391N11	00000
		F	M10 × 3 mm	63/64"	0.984"	1 21/32"	—	—	25/64"	Metric Rounded Trapezoidal	4:1	1 11/32"	4	12	Durometer 74D	10,000	Not Rated	6	-40 to 185	2391N12	00000
		F	M12 × 2.5 mm	1 3/8"	1.102"	1 57/64"	—	—	15/32"	Metric Rounded Trapezoidal	2:1	1 1/2"	2	5	Durometer 74D	10,000	Not Rated	6	-40 to 185	2391N13	00000
		F	M16 × 5 mm	1 3/8"	1.102"	1 57/64"	—	—	15/32"	Metric Rounded Trapezoidal	7:1	1 1/2"	7	35	Durometer 74D	10,000	Not Rated	6	-40 to 185	2391N14	00000
		F	M20 × 5 mm	1 47/64"	1.26"	2 11/64"	—	—	15/32"	Metric Rounded Trapezoidal	4:1	1 49/64"	4	20	Durometer 74D	10,000	Not Rated	6	-40 to 185	2391N15	000000
		F	M20 × 7.5 mm	1 47/64"	1.26"	2 11/64"	—	—	15/32"	Metric Rounded Trapezoidal	8:1	1 49/64"	8	60	Durometer 74D	10,000	Not Rated	6	-40 to 185	2391N16	000000


		PEEK



				D	M2 × 0.4 mm	9/32"	0.209"	—	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	2:1	11/32"	2	0.75	Durometer 83D	Not Rated	2	2	—	4537N181	00000


				D	M2 × 0.4 mm	9/32"	0.209"	—	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	4:1	11/32"	4	1.5	Durometer 83D	Not Rated	2	2	—	4537N182	00000
				D	M2 × 0.4 mm	9/32"	0.209"	—	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	8:1	11/32"	8	3	Durometer 83D	Not Rated	2	2	—	4537N183	00000
				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	00000
				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
				D	M4 × 1 mm	13/32"	0.354"	—	3/4"	13/32"	1/8"	Metric Rounded Trapezoidal	4:1	19/32"	4	4	Durometer 83D	Not Rated	10	2	—	4537N187	00000
				D	M4 × 1 mm	13/32"	0.354"	—	3/4"	13/32"	1/8"	Metric Rounded Trapezoidal	8:1	19/32"	8	8	Durometer 83D	Not Rated	10	2	—	4537N188	00000


				PEEK with Wear-Compensating Internal O-Ring



						D	M2 × 0.4 mm	5/16"	0.228"	—	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	2:1	11/32"	2	0.75	Durometer 83D	Not Rated	1	2	—	4537N201	00000


						D	M2 × 0.4 mm	5/16"	0.228"	—	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	4:1	11/32"	4	1.5	Durometer 83D	Not Rated	1	2	—	4537N202	00000
						D	M2 × 0.4 mm	5/16"	0.228"	—	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	8:1	11/32"	8	3	Durometer 83D	Not Rated	1	2	—	4537N203	00000
						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
						D	M4 × 1 mm	31/64"	0.406"	—	3/4"	13/32"	1/8"	Metric Rounded Trapezoidal	4:1	19/32"	4	4	Durometer 83D	Not Rated	4	2	—	4537N207	00000
						D	M4 × 1 mm	31/64"	0.406"	—	3/4"	13/32"	1/8"	Metric Rounded Trapezoidal	8:1	19/32"	8	8	Durometer 83D	Not Rated	4	2	—	4537N208	00000

Metric 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. To ensure compatibility, please select components that have the same thread direction, size, and number of thread starts. Class 7e and 7H components are compatible.

Flange Nuts—Right-Hand Thread

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

932 Bearing Bronze—932 bearing bronze components are more wear resistant than brass components. They have good machinability and fair corrosion resistance.

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, mm
	Thread Size	Thread Type	Ht., mm	Dia., mm	Dia.	Thk.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn, mm	Thread Fit	Hardness	Tensile Strength		Each
932 Bearing Bronze



		M10 × 2 mm	Metric Trapezoidal	35	28	48	12	1	1:1	2	Metric Trapezoidal Class 7H	Not Rated	Not Rated	94353A321	0000000


		M12 × 3 mm	Metric Trapezoidal	35	28	48	12	1	1:1	3	Metric Trapezoidal Class 7H	Not Rated	Not Rated	94353A322	00000
		M16 × 4 mm	Metric Trapezoidal	35	28	48	12	1	1:1	4	Metric Trapezoidal Class 7H	Not Rated	Not Rated	94353A323	00000
		M20 × 4 mm	Metric Trapezoidal	44	32	55	12	1	1:1	4	Metric Trapezoidal Class 7H	Not Rated	Not Rated	94353A324	00000
		M26 × 5 mm	Metric Trapezoidal	46	38	62	14	1	1:1	5	Metric Trapezoidal Class 7H	Not Rated	Not Rated	94353A325	000000
		M40 × 7 mm	Metric Trapezoidal	66	63	98	16	1	1:1	7	Metric Trapezoidal Class 7H	Not Rated	Not Rated	94353A326	000000

Hex Nuts—Right-Hand Thread

Hex nuts fasten and position lead screw components.

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.

	Thread Type	Ht., mm	Wd., mm	No. of Thread Starts	Speed Ratio	Travel Distance per Turn, mm	Thread Fit	Fastener Strength Grade/Class	Hardness	Tensile Strength		Each
Carbon Steel



	M12 × 3 mm	Metric Trapezoidal	12	22.2	1	1:1	3	Metric Trapezoidal Class 7H	SAE Grade 2	Not Rated	Not Rated	94353A120	000000


	M16 × 4 mm	Metric Trapezoidal	16	27	1	1:1	4	Metric Trapezoidal Class 7H	SAE Grade 2	Not Rated	Not Rated	94353A160	00000
	M20 × 4 mm	Metric Trapezoidal	20	31.75	1	1:1	4	Metric Trapezoidal Class 7H	SAE Grade 2	Not Rated	Not Rated	94353A200	00000
	M26 × 5 mm	Metric Trapezoidal	25.4	41.3	1	1:1	5	Metric Trapezoidal Class 7H	SAE Grade 2	Not Rated	Not Rated	94353A260	00000
	M40 × 7 mm	Metric Trapezoidal	39.9	60.33	1	1:1	7	Metric Trapezoidal Class 7H	SAE Grade 2	Not Rated	Not Rated	94353A400	00000

Square Nuts—Right-Hand Thread

Square nuts fasten and position lead screw components. Square nuts have large sides, which make them easier to grip with a wrench than hex nuts and keep them from rotating in channels and square holes.

360 Brass—360 brass components have excellent machinability and good corrosion resistance.

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.

	Thread Type	Ht., mm	Wd., mm	No. of Thread Starts	Speed Ratio	Travel Distance per Turn, mm	Thread Fit	Hardness	Tensile Strength		Each
360 Brass



	M10 × 2 mm	Metric Trapezoidal	20	19	1	1:1	2	Metric Trapezoidal Class 7H	Not Rated	Not Rated	94353A311	000000


	M12 × 3 mm	Metric Trapezoidal	25	25	1	1:1	3	Metric Trapezoidal Class 7H	Not Rated	Not Rated	94353A312	00000
	M16 × 4 mm	Metric Trapezoidal	35	28	1	1:1	4	Metric Trapezoidal Class 7H	Not Rated	Not Rated	94353A313	00000
	M20 × 4 mm	Metric Trapezoidal	50	38	1	1:1	4	Metric Trapezoidal Class 7H	Not Rated	Not Rated	94353A314	000000

Metric Ultra-Precision Lead Screws and Nuts


	Style A	Style B	Style C	Style D

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.

Externally Threaded Nuts—Right-Hand Thread


Style A	Style B

Acetal—Acetal nuts have good wear and corrosion resistance.

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.	Dia.	Hex Wd.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Size	Lg.	Hardness	Tensile Strength, psi	Dynamic Thrust Load Cap., lb.	Temp., ° F		Each
Acetal



		A	M2 × 0.5 mm	11/16"	—	—	0.297"	7/16"	Metric Rounded Trapezoidal	1:1	1	0.5	3/8"-24	3/16"	Not Rated	8,000	10	-40 to 185	7549K58	000000


		A	M4 × 0.3 mm	11/16"	—	—	0.297"	7/16"	Metric Rounded Trapezoidal	1:1	1	0.3	3/8"-24	3/16"	Not Rated	8,000	25	-40 to 185	7549K59	00000
		A	M8 × 1.5 mm	1"	—	—	0.548"	11/16"	Metric Rounded Trapezoidal	1:1	1	1.5	5/8"-18	1/4"	Not Rated	8,000	75	-40 to 185	7549K61	00000


		PEEK



				B	M2 × 0.4 mm	5/16"	0.22"	0.197"	—	—	Metric Rounded Trapezoidal	1:1	1	0.375	M5 × 0.8 mm	9/64"	Durometer 83D	Not Rated	2	—	90500A220	00000


				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	00000
				B	M4 × 1 mm	1/2"	0.402"	0.354"	—	—	Metric Rounded Trapezoidal	1:1	1	1	M9 × 1 mm	13/64"	Durometer 83D	Not Rated	10	—	90500A240	00000

Flange Nuts—Right-Hand Thread


Style C	Style D

Style C

Style D

Acetal—Acetal nuts have good wear and corrosion resistance.

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.	Dia.	Wd.	Ht.	Thk.	Thread Type	Speed Ratio	Bolt Circle Dia.	No. of Thread Starts	Travel Distance per Turn, mm	Hardness	Tensile Strength, psi	Dynamic Thrust Load Cap., lb.	No. of Mounting Holes	Temp., ° F		Each
Acetal



		C	M2 × 0.5 mm	1/2"	0.297"	—	3/4"	13/32"	1/8"	Metric Rounded Trapezoidal	1:1	39/64"	1	0.5	Not Rated	8,000	10	2	-40 to 185	7549K62	000000


		C	M4 × 0.3 mm	1/2"	0.297"	—	3/4"	13/32"	1/8"	Metric Rounded Trapezoidal	1:1	39/64"	1	0.3	Not Rated	8,000	25	2	-40 to 185	7549K63	00000
		D	M8 × 1.5 mm	3/4"	0.548"	1 1/8"	—	—	3/16"	Metric Rounded Trapezoidal	1:1	7/8"	1	1.5	Not Rated	8,000	75	3	-40 to 185	7549K64	00000


		PEEK



				C	M2 × 0.4 mm	9/32"	0.209"	—	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	1:1	11/32"	1	0.375	Durometer 83D	Not Rated	2	2	—	90500A250	00000


				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	00000
				C	M4 × 1 mm	13/32"	0.354"	—	3/4"	13/32"	1/8"	Metric Rounded Trapezoidal	1:1	19/32"	1	1	Durometer 83D	Not Rated	10	2	—	90500A270	00000


				PEEK with Wear-Compensating Internal O-Ring



						C	M2 × 0.4 mm	5/16"	0.228"	—	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	1:1	11/32"	1	0.375	Durometer 83D	Not Rated	1	2	—	90500A280	000000


						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
						C	M4 × 1 mm	31/64"	0.406"	—	3/4"	13/32"	1/8"	Metric Rounded Trapezoidal	1:1	19/32"	1	1	Durometer 83D	Not Rated	5	2	—	90500A310	000000

Ball Screws and Nuts

Internal ball bearings provide smooth low-friction travel in applications that require high speeds, accurate positioning, and repeatable movement. Also known as single-start ball screws and nuts, they have a single thread that runs the length of the screw. They operate with more torque than fast-travel ball screws and nuts. To ensure compatibility, select components that have the same thread direction and size. Ball nuts are furnished with a tube to keep ball bearings in place. Do not remove the tube until you are ready to install the nuts onto the screws.

Ball Screws with Flange Ball Nut—Right-Hand Threaded

Root diameter indicates the diameter the ball screw will be after machining away the threads.

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

		Ball Screw			Flange Ball Nut, mm
	Thread Size	Lg., mm	Root Dia., mm	Tensile Strength, psi	Lg.	Dia.	Lg. Tolerance Type	No. of Thread Starts	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Hardness	Dynamic Thrust Load Cap., lb.	Max. Backlash, mm	Temp. Range, ° F		Each
Carbon Steel Ball Screw with Alloy Steel Flange Ball Nut



		M6	150	5.3	21,000	21	13	Plus	1	1	±0.210 mm/300 mm	Rockwell C58	150	0.05	5 to 175	6624K66	0000000


		M6	250	5.3	21,000	21	13	Plus	1	1	±0.210 mm/300 mm	Rockwell C58	150	0.05	5 to 175	6638K1	000000
		M8	150	6.6	21,000	28	20	Plus	1	2	±0.210 mm/300 mm	Rockwell C58	470	0.05	5 to 175	6624K67	000000
		M8	250	6.6	21,000	28	20	Plus	1	2	±0.210 mm/300 mm	Rockwell C58	470	0.05	5 to 175	6638K3	000000
		M10	200	8.6	21,000	28	23	Plus	1	2	±0.210 mm/300 mm	Rockwell C58	510	0.05	5 to 175	6624K68	000000
		M10	300	8.6	21,000	28	23	Plus	1	2	±0.210 mm/300 mm	Rockwell C58	510	0.05	5 to 175	6638K7	000000
		M12	200	10.6	21,000	30	25	Plus	1	2	±0.210 mm/300 mm	Rockwell C58	560	0.05	5 to 175	6638K9	000000
		M12	300	10.6	21,000	30	25	Plus	1	2	±0.210 mm/300 mm	Rockwell C58	560	0.05	5 to 175	6638K11	000000