Ball Flanges | McMaster-Carr

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Component

Ball Nut

System of Measurement

Thread Size

Nut Type

Thread Direction

Length

Diameter

Travel Distance per Turn

Number of Thread Starts

Flange Material

18-8 Stainless Steel

Steel

Dynamic Thrust Load Capacity

Less than 1,000 lb.

1,000 lb. to 1,999 lb.

2,000 lb. to 2,999 lb.

3,000 lb. to 9,999 lb.

10,000 lb. or greater

Material

Bolt Circle Diameter

Number of Mounting Holes

Flange Diameter

Thread Type

Metric Rounded Trapezoidal

UN/UNF (SAE Straight)

Maximum Backlash

Flange Thickness

Hardness

Rockwell C58 to Rockwell C62

REACH

Flange Hardness

Mounting Hole Diameter

RoHS

Maximum Temperature

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

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22 Products

Self-Stopping Ball Screws and Nuts

Stop Pin Shown Installed

Keep your ball screw spinning without the ball nut damaging your system—a clutch-like collar inside the ball nut prevents it from travelling past the stop pins. Install the included stop pins anywhere along the length of the ball screw by drilling a hole in the valley of the threads (also known as the root) and pressing in the stop pin. When the collar meets the stop pin, the ball nut disengages from the threads and begins to idle. To start the ball nut travelling again, spin the ball screw in the opposite direction. All components are black-oxide steel and have mild corrosion resistance. To ensure compatibility, select components that have the same thread 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.

Flange Ball Nuts—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.

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



		5/8"-6	1 7/8"	1"	2"	13/32"	2	0.188"	1 5/8"	Rockwell C56	300	0.006"	-65 to 300	0000000	0000000


		1"-4	2 23/32"	1 5/8"	3 15/64"	5/8"	2	0.274"	2 3/4"	Rockwell C56	900	0.008"	-65 to 300	0000000	000000

Fast-Travel Ball Screws and Nuts


	Flange Nut Ball Nuts Style F	Flange Nut Ball Nuts Style G

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.

Flange Ball Nuts—Right-Hand Threaded


Style F	Style G

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

Black-Oxide Alloy Steel—Black-oxide alloy steel ball nuts have mild corrosion resistance.

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.

Wipers—Secure a way wiper on the end of a ball nut to sweep chips and other contaminants out of the way as it moves across the ball screw.

	Ball Screw Nuts																	Wipers
							Flange
	Style	Thread Size	Lg.	Wd.	Ht.	Dia.	Dia.	Thk.	No. of Thread Starts	Travel Distance per Turn	Bolt Circle Dia.	Hardness	Dynamic Thrust Load Cap., lb.	Max. Backlash	Temp. Range, ° F		Each		Each
Black-Oxide Alloy Steel



		F	1/2"-4	1 3/4"	—	—	1 1/16"	2 39/64"	17/32"	2	0.5"	2 3/32"	Rockwell C56	850	0.015"	-65 to 300	00000000	0000000	———	0


		F	3/4"-4	2 15/16"	—	—	1 5/16"	2 39/64"	17/32"	2	0.5"	2 3/32"	Rockwell C56	3,400	0.015"	-65 to 300	00000000	000000	———	0
		F	1"-4	3 1/8"	—	—	1 11/16"	3 15/64"	5/8"	2	0.5"	2 3/4"	Rockwell C56	4,250	0.015"	-65 to 300	00000000	000000	———	0
		G	1"-4	3"	1 1/2"	1 1/2"	—	3 15/64"	5/8"	4	1"	2 3/4"	Rockwell C56	2,300	0.015"	-65 to 300	00000000	000000	———	0
		G	1 1/2"-2	3 3/4"	2 1/4"	2 1/4"	—	4 15/16"	1 1/64"	2	1"	4 1/8"	Rockwell C56	8,000	0.015"	-65 to 300	00000000	000000	0000000	0000000

Ball Screws and Nuts


	Flange Nut Ball Nuts Style D	E

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.

Flange Ball Nuts—Right-Hand Threaded


Style D	E

Black-Oxide Alloy Steel—Black-oxide alloy steel ball nuts have mild corrosion resistance.

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



		D	3/8"-8	1 1/64"	—	—	3/4"	1 19/32"	9/32"	1	0.125"	1 15/64"	Rockwell C56	170	0.015"	-65 to 300	00000000	0000000


		D	3/4"-5	2 29/32"	—	—	1 1/4"	2 19/32"	17/32"	1	0.2"	2 3/32"	Rockwell C56	1,900	0.015"	-65 to 300	00000000	000000
		D	1 1/2"-2	5 19/32"	—	—	2 5/8"	4 15/16"	25/32"	1	0.5"	4 1/16"	Rockwell C56	12,900	0.015"	-65 to 300	00000000	000000
		D	1 1/2"-4	3 1/32"	—	—	2 3/32"	4 23/64"	17/32"	1	0.25"	3 7/16"	Rockwell C56	4,250	0.015"	-65 to 300	00000000	000000
		D	2 1/4"-2	6 23/32"	—	—	3 3/8"	5 3/8"	1 37/64"	1	0.5"	4 3/8"	Rockwell C58 to Rockwell C62	21,306	0.015"	-65 to 300	0000000	00000000
		E	5/8"-5	1 47/64"	1"	1"	—	2 19/32"	17/32"	1	0.2"	2 3/32"	Rockwell C56	820	0.015"	-65 to 300	00000000	000000
		E	1"-4	2 3/8"	1 1/2"	1 1/2"	—	3 15/64"	5/8"	1	0.25"	2 3/4"	Rockwell C56	1,620	0.015"	-65 to 300	00000000	000000

Flange Ball Nuts—Left-Hand Threaded


E

Black-Oxide Alloy Steel—Black-oxide alloy steel ball nuts have mild corrosion resistance.

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



		E	5/8"-5	1 47/64"	1"	1"	2 19/32"	17/32"	1	0.2"	2 3/32"	Rockwell C56	820	0.015"	-65 to 300	00000000	0000000


		E	1"-4	2 3/8"	1 1/2"	1 1/2"	3 15/64"	5/8"	1	0.25"	2 3/4"	Rockwell C56	1,620	0.015"	-65 to 300	00000000	000000
		E	1"-4	2 5/8"	1 1/2"	1 1/2"	2 15/64"	5/8"	1	0.25"	2 3/4"	Rockwell C56	1,620	0.015"	-65 to 300	00000000	000000

Fast-Travel Corrosion-Resistant Ball Screws and Nuts

Multiple thread channels (also known as thread starts) create faster linear travel than ball screws with a single thread start. Suitable for use in harsh environments, these ball screws and nuts are made of stainless steel. 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. 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.

Flange Ball Nuts—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.

				Flange
	Thread Size	Lg.	Dia.	Dia.	Thk.	No. of Thread Starts	Travel Distance per Turn	Bolt Circle Dia.	Hardness	Dynamic Thrust Load Cap., lb.	Max. Backlash	Temp. Range, ° F		Each
17-4 PH Stainless Steel



		1/2"-4	1 29/32"	1 1/16"	2 19/32"	17/32"	2	0.5"	2 3/32"	Rockwell C38	140	0.007"	-65 to 300	0000000	0000000


		3/4"-4	2 15/16"	1 5/16"	2 19/32"	17/32"	2	0.5"	2 3/32"	Rockwell C38	600	0.007"	-65 to 300	0000000	000000

Corrosion-Resistant Ball Screws and Nuts


	Flange Nut Ball Nuts Style C	Flange Nut Ball Nuts Style D

Suitable for use in harsh environments, these ball screws and nuts are made of stainless steel. 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 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.

Flange Ball Nuts—Right-Hand Threaded


Style C	Style D

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
	Style	Thread Size	Lg.	Wd.	Ht.	Dia.	Dia.	Thk.	No. of Thread Starts	Travel Distance per Turn	Bolt Circle Dia.	Hardness	Dynamic Thrust Load Cap., lb.	Max. Backlash	Temp. Range, ° F		Each
17-4 PH Stainless Steel



		C	3/8"-8	1"	—	—	3/4"	1 19/32"	17/64"	1	0.125"	1 15/64"	Rockwell C38	25	0.007"	-65 to 300	0000000	0000000


		D	5/8"-5	1 47/64"	1"	1"	—	2 19/32"	17/32"	1	0.2"	2 3/32"	Rockwell C38	170	0.007"	-65 to 300	0000000	000000