Metric Ball Bolts | McMaster-Carr

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56 Products

Ball Screws and Nuts


	Ball Nuts Flange Nut Style C

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	0000000	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	000000	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	0000000	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	000000	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	0000000	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	000000	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	000000	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	0000000	000000

Ball Screws—Right-Hand Threaded

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.

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

	Lg., mm	No. of Thread Starts	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Root Dia., mm	Hardness	Tensile Strength, psi	Temp. Range, ° F		Each
Carbon Steel



	M14	500	1	4	±0.210 mm/300 mm	11.5	Rockwell C58	21,000	5 to 175	0000000	000000


	M14	1,000	1	4	±0.210 mm/300 mm	11.5	Rockwell C58	21,000	5 to 175	0000000	000000
	M16	500	1	5	±0.210 mm/300 mm	13.5	Rockwell C58	21,000	5 to 175	0000000	000000
	M16	1,000	1	5	±0.210 mm/300 mm	13.5	Rockwell C58	21,000	5 to 175	000000	000000
	M20	500	1	5	±0.210 mm/300 mm	17.2	Rockwell C58	21,000	5 to 175	0000000	000000
	M20	1,000	1	5	±0.210 mm/300 mm	17.2	Rockwell C58	21,000	5 to 175	000000	000000
	M20	1,500	1	10	±0.210 mm/300 mm	16.4	Rockwell C58	21,000	5 to 175	000000	000000
	M25	500	1	5	±0.210 mm/300 mm	22.2	Rockwell C58	21,000	5 to 175	0000000	000000
	M25	1,000	1	5	±0.210 mm/300 mm	22.2	Rockwell C58	21,000	5 to 175	0000000	000000
	M25	1,500	1	10	±0.210 mm/300 mm	20.2	Rockwell C58	21,000	5 to 175	0000000	000000

Platform Ball Nuts—Right-Hand Threaded

Image of Product. Front orientation. Contains Annotated. Ball Screws and Nuts. Ball Screws and Nuts , Platform Nut, Ball Nuts.

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.

	Lg., mm	Wd., mm	Ht., mm	Ctr. Ht., mm	No. of Thread Starts	Travel Distance per Turn, mm	Hardness	Dynamic Thrust Load Cap., lb.	Max. Backlash, mm	Temp. Range, ° F		Each
Alloy Steel



	M14	35	34	30	13	1	4	Rockwell C58	1,200	0.1	5 to 175	0000000	0000000


	M16	36	42	32.5	16	1	5	Rockwell C58	1,200	0.1	5 to 175	0000000	000000
	M20	35	48	39	17	1	5	Rockwell C58	1,300	0.1	5 to 175	0000000	000000
	M20	58	48	46	18	1	10	Rockwell C58	2,350	0.1	5 to 175	0000000	000000
	M25	35	60	45	20	1	5	Rockwell C58	1,500	0.1	5 to 175	0000000	000000
	M25	94	60	55	23	1	10	Rockwell C58	7,000	0.1	5 to 175	0000000	000000

Flange Ball Nuts—Right-Hand Threaded

Style C

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.

					Flange, mm
	Style	Thread Size	Lg., mm	Dia., mm	Wd.	Ht.	Thk.	No. of Thread Starts	Travel Distance per Turn, mm	Hardness	Dynamic Thrust Load Cap., lb.	Max. Backlash, mm	Temp. Range, ° F		Each
Alloy Steel



		C	M14	40	31	50	37	10	1	4	Rockwell C58	1,200	0.1	5 to 175	0000000	0000000


		C	M16	40	34	54	40	10	1	5	Rockwell C58	1,200	0.1	5 to 175	0000000	000000
		C	M20	40	40	60	46	10	1	5	Rockwell C58	1,300	0.1	5 to 175	0000000	000000
		C	M20	64	52	82	64	12	1	10	Rockwell C58	2,350	0.1	5 to 175	0000000	000000
		C	M25	40	43	67	50	10	1	5	Rockwell C58	1,500	0.1	5 to 175	0000000	000000
		C	M25	98	60	96	72	15	1	10	Rockwell C58	7,000	0.1	5 to 175	0000000	000000

Fast-Travel Ball Screws and Nuts


	Ball Nuts, Externally Threaded Nut, Style A	Ball Nuts, Externally Threaded Nut, Style B	Ball Nuts, Externally Threaded Nut, Style C	Ball Nuts Flange Nut Style E

Multiple thread channels (also known as thread starts) create faster linear travel than ball screws with a single thread start. Internal ball bearings provide smooth low-friction travel in applications that require high speeds, accurate positioning, and repeatable movement. To ensure compatibility, select components that have the same thread size and number of thread starts. 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—Right-Hand Threaded

Carbon Steel—Carbon steel ball screws and nuts are case hardened, so they resist wear better than standard carbon steel. However, they are less corrosion resistant than black-oxide alloy steel screws and nuts.

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.

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

	Lg., mm	No. of Thread Starts	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Root Dia., mm	Hardness	Tensile Strength, psi	Temp. Range, ° F		Each
Carbon Steel



	M12	500	2	10	±0.05 mm/300 mm	9.6	Rockwell C56	95,000	32 to 150	00000000	0000000


	M12	1,000	2	10	±0.05 mm/300 mm	9.6	Rockwell C56	95,000	32 to 150	00000000	000000
	M15	500	4	16	±0.05 mm/300 mm	12.9	Rockwell C56	95,000	32 to 150	00000000	00000
	M15	500	4	20	±0.05 mm/300 mm	12.3	Rockwell C56	95,000	32 to 150	00000000	000000
	M15	1,000	4	16	±0.05 mm/300 mm	12.9	Rockwell C56	95,000	32 to 150	00000000	000000
	M15	1,000	4	20	±0.05 mm/300 mm	12.3	Rockwell C56	95,000	32 to 150	00000000	000000
	M16	500	4	16	±0.05 mm/300 mm	13.3	Rockwell C56	95,000	32 to 150	00000000	00000
	M16	1,000	4	16	±0.05 mm/300 mm	13.3	Rockwell C56	95,000	32 to 150	00000000	000000
	M20	500	4	20	±0.05 mm/300 mm	17	Rockwell C56	95,000	32 to 150	00000000	000000
	M20	1,000	4	20	±0.05 mm/300 mm	17	Rockwell C56	95,000	32 to 150	00000000	000000
	M32	500	2	20	±0.05 mm/300 mm	28.5	Rockwell C56	95,000	32 to 150	00000000	000000


	M32	500	4	32	±0.05 mm/300 mm	28.3	Rockwell C56	95,000	32 to 150	00000000	000000
	M32	1,000	2	20	±0.05 mm/300 mm	28.5	Rockwell C56	95,000	32 to 150	00000000	000000
	M32	1,000	4	32	±0.05 mm/300 mm	28.3	Rockwell C56	95,000	32 to 150	00000000	000000
	M40	500	4	40	±0.05 mm/300 mm	35.4	Rockwell C56	95,000	32 to 150	00000000	000000
	M40	1,000	4	40	±0.05 mm/300 mm	35.4	Rockwell C56	95,000	32 to 150	00000000	000000

Externally Threaded Ball Nuts—Right-Hand Threaded


Style A	Style B	Style C

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.

	Thread Size	Lg., mm	Dia., mm	No. of Thread Starts	Travel Distance per Turn, mm	External Thread Size	Hardness	Dynamic Thrust Load Cap., lb.	Max. Backlash, mm	Temp. Range, ° F		Each
Carbon Steel



	A	M12	50	30	1	10	M25	Rockwell C56	1,000	0.02	32 to 150	00000000	0000000


	B	M16	50	39	4	16	M30	Rockwell C56	1,500	0.04	32 to 150	00000000	000000
	C	M32	90	53	4	32	M50	Rockwell C56	3,700	0.03	32 to 150	00000000	000000

Flange Ball Nuts—Right-Hand Threaded

Style E

Image of Attribute. Front orientation. Contains Annotated. Fast-Travel Ball Screws and Nuts.

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.

					Flange, mm
	Style	Thread Size	Lg., mm	Dia., mm	Dia.	Thk.	No. of Thread Starts	Travel Distance per Turn, mm	Bolt Circle Dia., mm	Hardness	Dynamic Thrust Load Cap., lb.	Max. Backlash, mm	Temp. Range, ° F		Each
Carbon Steel



		E	M12	43	23	40	10	2	10	32	Rockwell C56	1,100	0.02	32 to 150	00000000	0000000


		E	M15	56	33	57	10	4	20	45	Rockwell C56	2,250	0.04	32 to 150	00000000	000000
		E	M15	61	27	48	10	4	16	38	Rockwell C56	2,200	0.04	32 to 150	00000000	000000
		E	M20	77	35	58	10	4	20	47	Rockwell C56	2,750	0.04	32 to 150	00000000	000000
		E	M32	88	53	86	14	4	32	71	Rockwell C56	5,800	0.05	32 to 150	00000000	000000
		E	M32	108	49	80	16	2	20	65	Rockwell C56	4,900	0.04	32 to 150	00000000	000000
		E	M40	101	66	106	18	4	40	85	Rockwell C56	9,550	0.07	32 to 150	00000000	000000