1"-4 Rods | McMaster-Carr

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	System of Measurement System of Measurement

Inch

	Thread Size Thread Size	Show

1"-4

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	Thread Type Thread Type

Acme

Ball

	Component Component

	Ball Nut
	Ball Screw
	Ball Screw with One Machined End
	Collar
	Handle
	Lead Screw
	Nut

	Thread Direction Thread Direction


Right Hand	Left Hand

	Material Material

	Length Length

	Travel Distance per Turn Travel Distance per Turn

0.25"

0.274"

0.5"

	Nut Type Nut Type


Hex	Flange

Round	Externally Threaded

Platform

	Number of Thread Starts Number of Thread Starts

	Threading Threading


Fully Threaded	Partially Threaded

	Tensile Strength Tensile Strength

	Hardness Hardness

	Speed Ratio Speed Ratio

1:1

2:1

	Thread Fit Thread Fit

Class 2C

Class 2G

	Fastener Strength Grade/Class Fastener Strength Grade/Class

ASTM Grade B7

ASTM Grade B8M

Grade 2

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Specifications Met Specifications Met

ASTM A108

ASTM A193

ASTM B505

	Diameter Diameter

	Width Width

	Height Height

100 Products

Selecting Compatible 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 and size.

Carbon steel components are easier to machine than alloy steel components. Zinc-plated carbon steel components have mild corrosion resistance. Alloy steel components are harder and stronger than carbon steel components. Cast iron components have good machinability and high strength. 932 bearing bronze components are more wear resistant than brass components. They have good machinability and fair corrosion resistance. 18-8 stainless steel components have good corrosion resistance. 316 stainless steel components have excellent corrosion resistance.

Travel distance per turn, also known as screw lead, is the distance a nut or handle 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

Carbon Steel
Thread Size	Lg.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Fastener Strength Grade/Class	Hardness	Tensile Strength, psi	Specifications Met		Each
1"-4	12"	1	1:1	0.25"	Class 2G	Grade 2	Rockwell B61	64,000	ASTM A108	000000000	000000
1"-4	3 ft.	1	1:1	0.25"	Class 2G	Grade 2	Rockwell B61	64,000	ASTM A108	000000000	00000
1"-4	6 ft.	1	1:1	0.25"	Class 2G	Grade 2	Rockwell B61	64,000	ASTM A108	000000000	00000
Alloy Steel
1"-4	12"	1	1:1	0.25"	Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	000000000	00000
1"-4	3 ft.	1	1:1	0.25"	Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	000000000	00000
1"-4	6 ft.	1	1:1	0.25"	Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	000000000	000000
18-8 Stainless Steel
1"-4	12"	1	1:1	0.25"	Class 2G	__	Rockwell B96	Not Rated	__	000000000	00000
1"-4	3 ft.	1	1:1	0.25"	Class 2G	__	Rockwell B96	Not Rated	__	000000000	000000
1"-4	6 ft.	1	1:1	0.25"	Class 2G	__	Rockwell B96	Not Rated	__	000000000	000000
316 Stainless Steel
1"-4	12"	1	1:1	0.25"	Class 2G	ASTM Grade B8M	Rockwell B97	75,000	ASTM A193	000000000	00000
1"-4	3 ft.	1	1:1	0.25"	Class 2G	ASTM Grade B8M	Rockwell B97	75,000	ASTM A193	000000000	000000
1"-4	6 ft.	1	1:1	0.25"	Class 2G	ASTM Grade B8M	Rockwell B97	75,000	ASTM A193	000000000	000000

Lead Screws—Left-Hand Threaded

Carbon Steel
Thread Size	Lg.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Fastener Strength Grade/Class	Hardness	Tensile Strength, psi	Specifications Met		Each
1"-4	3 ft.	1	1:1	0.25"	Class 2G	Grade 2	Rockwell B61	64,000	ASTM A108	000000000	000000
1"-4	6 ft.	1	1:1	0.25"	Class 2G	Grade 2	Rockwell B61	64,000	ASTM A108	000000000	00000
Alloy Steel
1"-4	3 ft.	1	1:1	0.25"	Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	000000000	00000
1"-4	6 ft.	1	1:1	0.25"	Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	000000000	000000

Flange Nuts—Right-Hand Threaded

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

			Flange
Thread Size	Ht.	Dia.	Dia.	Thick.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Hardness		Each
932 Bearing Bronze
1"-4	2"	1 1/2"	2 1/2"	1/2"	1	1:1	0.25"	Class 2G	Not Rated	000000000	0000000

Round Nuts—Right-Hand Threaded

Round nuts move objects along the length of a lead screw.

932 Bearing Bronze
Thread Size	Ht.	Dia.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Hardness	Specifications Met		Each
1"-4	1 17/32"	1 21/32"	1	1:1	0.25"	Class 2G	Not Rated	ASTM B505	000000000	000000

Hex Nuts—Right-Hand Threaded

Hex nuts fasten and position lead screw components.

Carbon Steel
Thread Size	Ht.	Wd.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Hardness		Each
1"-4	63/64"	1 5/8"	1	1:1	0.25"	Class 2G	Rockwell B75	000000000	00000
Zinc-Plated Carbon Steel
1"-4	63/64"	1 5/8"	1	1:1	0.25"	Class 2G	Rockwell B75	000000000	00000
18-8 Stainless Steel
1"-4	63/64"	1 5/8"	1	1:1	0.25"	Class 2G	Rockwell B97	000000000	00000

Hex Nuts—Left-Hand Threaded

Hex nuts fasten and position lead screw components.

Carbon Steel
Thread Size	Ht.	Wd.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Fastener Strength Grade/Class	Hardness		Each
1"-4	63/64"	1 5/8"	1	1:1	0.25"	Class 2G	Grade 2	Rockwell B85	000000000	000000
18-8 Stainless Steel
1"-4	63/64"	1 5/8"	1	1:1	0.25"	Class 2G	__	Rockwell B97	000000000	00000

Flat Handles—Right-Hand Threaded

Handles fasten and position lead screw components. Handles are easy to grip and tighten by hand for quick assembly and disassembly.

Cast Iron
Thread Size	Ht.	Wd.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Hardness		Each
1"-4	1 1/8"	9 1/2"	1	1:1	0.25"	Class 2G	Rockwell B72	000000000	000000

Precision Acme 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, please select components that have the same thread direction and size.

Carbon steel lead screws and flanges have good machinability. Black-oxide alloy steel lead screws are hard and strong. They have mild corrosion resistance. 303 and 304 stainless steel lead screws and flanges have good corrosion resistance.

Cast iron nuts have good machinability and high strength. 932 bearing bronze and 673 bronze nuts are wear resistant. They have good machinability and fair corrosion resistance. PET plastic nuts are lightweight and corrosion resistant.

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

Right-Hand Threads

1018 Carbon Steel
Thread Size	Lg.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength, psi		Each
1"-4	3 ft.	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1"-4	6 ft.	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
Black-Oxide 4140 Alloy Steel
1"-4	3 ft.	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	00000
1"-4	6 ft.	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
304 Stainless Steel
1"-4	3 ft.	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
1"-4	6 ft.	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000

Lead Screws—Left-Hand Threaded

Left-Hand Threads

1018 Carbon Steel
Thread Size	Lg., ft.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength, psi		Each
1"-4	3	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	0000000
1"-4	6	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
Black-Oxide 4140 Alloy Steel
1"-4	3	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
1"-4	6	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
304 Stainless Steel
1"-4	3	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
1"-4	6	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000

Platform Nuts—Right-Hand Threaded

Platform nuts have wide, machinable surfaces for custom mounting.

932 Bearing Bronze
Thread Size	Lg.	Wd.	Ht.	Center Ht.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Hardness	Dynamic Thrust Load Cap., lbs.		Each
1"-4	3"	3"	1 15/16"	1 1/8"	1	1:1	0.25"	Class 2C	Brinell 65	5,000	000000	0000000

Platform Nuts—Left-Hand Threaded

Platform nuts have wide, machinable surfaces for custom mounting.

932 Bearing Bronze
Thread Size	Lg.	Wd.	Ht.	Center Ht.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Hardness	Dynamic Thrust Load Cap., lbs.		Each
1"-4	3"	3"	1 15/16"	1 1/8"	1	1:1	0.25"	Class 2C	Brinell 65	5,000	0000000	0000000

Round Nuts—Right-Hand Threaded

Cast Iron
Thread Size	Lg.	Dia.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Hardness	Dynamic Thrust Load Cap., lbs.		Each
1"-4	2"	2.984"	1	1:1	0.25"	Class 2C	Brinell 217	Not Rated	000000000	000000
932 Bearing Bronze
1"-4	2"	2.984"	1	1:1	0.25"	Class 2C	Brinell 65	5,000	00000000	000000

Round Nuts—Left-Hand Threaded

Cast Iron
Thread Size	Lg.	Dia.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Hardness	Dynamic Thrust Load Cap., lbs.		Each
1"-4	2"	2.984"	1	1:1	0.25"	Class 2C	Brinell 217	Not Rated	000000000	000000
932 Bearing Bronze
1"-4	2"	2.984"	1	1:1	0.25"	Class 2C	Brinell 65	5,000	00000000	000000

Externally Threaded Nuts—Right-Hand Threaded

Combine externally threaded nuts with a flange to create a custom flange nut.

						External Thread
Thread Size	Lg.	Dia.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Size	Lg.	Thread Fit	Hardness	Dynamic Thrust Load Cap., lbs.	Temperature Range, °F		Each
673 Bronze
1"-4	1 1/2"	1.5"	1	1:1	0.25"	1 3/8"-16	1/2"	Class 2C	Brinell 70	Not Rated	__	000000000	000000
PET Plastic
1"-4	1 1/2"	1.5"	1	1:1	0.25"	1 3/8"-16	1/2"	Class 2C	Not Rated	2,500	15° to 175°	000000000	00000

Externally Threaded Nuts—Left-Hand Threaded

Combine externally threaded nuts with a flange to create a custom flange nut.

						External Thread
Thread Size	Lg.	Dia.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Size	Lg.	Thread Fit	Hardness	Dynamic Thrust Load Cap., lbs.		Each
673 Bronze
1"-4	1 1/2"	1.5"	1	1:1	0.25"	1 3/8"-16	1/2"	Class 2C	Brinell 70	Not Rated	000000000	000000

Flanges

Thread onto an externally threaded acme nut to create a custom flange nut.

1117 Carbon Steel
Flange Thread Size	Flange Dia.	Flange Thick.	Bolt Circle Dia.	Flange Hardness		Each
1 3/8"-16	2 49/64"	33/64"	2 17/64"	Brinell 156	000000000	000000
303 Stainless Steel
1 3/8"-16	2 49/64"	33/64"	2 17/64"	Brinell 140	0000000	00000

Flange Nuts—Right-Hand Threaded

Flange nuts have wide, machinable surfaces for custom mounting.

			Flange
Thread Size	Lg.	Dia.	Dia.	Thick.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength, psi	Dynamic Thrust Load Cap., lbs.		Each
932 Bearing Bronze
1"-4	3"	1.625"	3"	5/8"	1	1:1	0.25"	Class 2C	Brinell 65	35,000	5,000	000000000	0000000

Fast-Travel Precision Acme Lead Screws and Nuts

Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start. The threads have a tight thread fit for accurate, repeatable starts and stops. Pair with a motor in automated motion and positioning applications. To ensure compatibility, please select components that have the same thread direction, thread size, and number of thread starts.

Carbon steel lead screws and flanges have good machinability. 360 brass nuts have excellent machinability and good corrosion resistance. PET plastic nuts are lightweight and corrosion resistant.

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

1018 Carbon Steel
Thread Size	Lg.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength, psi		Each
1"-4	3 ft.	2	2:1	0.5"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1"-4	6 ft.	2	2:1	0.5"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000

Lead Screws—Left-Hand Threaded

1018 Carbon Steel
Thread Size	Lg., ft.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength, psi		Each
1"-4	3	2	2:1	0.5"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1"-4	6	2	2:1	0.5"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000

Externally Threaded Nuts—Right-Hand Threaded

Combine externally threaded nuts with a flange to create a custom flange nut.

						External Thread
Thread Size	Lg.	Dia.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Size	Lg.	Thread Fit	Hardness	Dynamic Thrust Load Cap., lbs.	Temperature Range, °F		Each
360 Brass
1"-4	1 1/2"	1.5"	2	2:1	0.5"	1 3/8"-16	1/2"	Class 2C	Brinell 70	5,000	__	000000000	000000
PET Plastic
1"-4	1 1/2"	1.5"	2	2:1	0.5"	1 3/8"-16	1/2"	Class 2C	Not Rated	2,500	15° to 175°	000000000	00000

Externally Threaded Nuts—Left-Hand Threaded

Combine externally threaded nuts with a flange to create a custom flange nut.

						External Thread
Thread Size	Lg.	Dia.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Size	Lg.	Thread Fit	Hardness	Dynamic Thrust Load Cap., lbs.		Each
360 Brass
1"-4	1 1/2"	1.5"	2	2:1	0.5"	1 3/8"-16	1/2"	Class 2C	Brinell 70	5,000	000000000	000000

Flanges

Thread onto an externally threaded acme nut to create a custom flange nut.

1117 Carbon Steel
Flange Thread Size	Flange Dia.	Flange Thick.	Bolt Circle Dia.	Flange Hardness		Each
1 3/8"-16	2 49/64"	33/64"	2 17/64"	Brinell 156	000000000	000000
303 Stainless Steel
1 3/8"-16	2 49/64"	33/64"	2 17/64"	Brinell 140	0000000	00000

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.

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

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

Ball Screws—Right-Hand Threaded

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

Alloy Steel
Thread Size	Lg., ft.	No. of Thread Starts	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Root Dia.	Hardness	Tensile Strength, psi	Temperature Range, °F		Each
1"-4	2	1	0.25"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	0000000
1"-4	3	1	0.25"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	4	1	0.25"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	5	1	0.25"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	6	1	0.25"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	7	1	0.25"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	8	1	0.25"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000

Ball Screws—Left-Hand Threaded

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

Alloy Steel
Thread Size	Lg., ft.	No. of Thread Starts	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Root Dia.	Hardness	Tensile Strength, psi	Temperature Range, °F		Each
1"-4	1	1	0.25"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	2	1	0.25"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	3	1	0.25"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	6	1	0.25"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000

Ball Screws with One Machined End—Right-Hand Threaded

Ball screws with one machined end fit into an end support and are ready to connect to a motor. To adjust the length, the non-machined end can be cut to size.

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

							Machined End			Keyway
Thread Size	Root Dia.	Lg., ft.	No. of Thread Starts	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Shoulder Lg.	Overall Lg.	Thread Size	Dia.	Lg.	Wd.	Hardness	Tensile Strength, psi	Temperature Range, °F		Each
Alloy Steel
1"-4	0.84"	2	1	0.25"	±0.004" per ft.	2 23/32"	4 1/32"	0.781"-32	5/8"	1 1/4"	3/16"	Rockwell C56	85,000	-40° to 300°	00000000	0000000
1"-4	0.84"	4	1	0.25"	±0.004" per ft.	2 23/32"	4 1/32"	0.781"-32	5/8"	1 1/4"	3/16"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	0.84"	6	1	0.25"	±0.004" per ft.	2 23/32"	4 1/32"	0.781"-32	5/8"	1 1/4"	3/16"	Rockwell C56	85,000	-40° to 300°	00000000	000000

Externally-Threaded Ball Nuts—Right-Hand Threaded

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.

Black-Oxide Alloy Steel
	Thread Size	Lg.	Wd.	Ht.	No. of Thread Starts	Travel Distance per Turn	External Thread Size	Hardness	Dynamic Thrust Load Cap., lbs.	Max. Backlash	Temperature Range, °F		Each
B	1"-4	2 11/32"	1 1/2"	1 1/2"	1	0.25"	1 9/16"-18	Rockwell C56	1,600	0.015"	-40° to 300°	00000000	0000000

Externally-Threaded Ball Nuts—Left-Hand Threaded

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 Nuts												Way Wipers
	Thread Size	Lg.	No. of Thread Starts	Travel Distance per Turn	External Thread Size	Hardness	Dynamic Thrust Load Cap., lbs.	Max. Backlash	Temperature Range, °F		Each		Each
Black-Oxide Alloy Steel
A	1"-4	2 11/32"	1	0.25"	1.563"-18	Rockwell C56	1,600	0.015"	-40° to 300°	00000000	0000000	0000000	000000

Flange Ball Nuts—Right-Hand Threaded

					Flange
	Thread Size	Lg.	Wd.	Ht.	Dia.	Thick.	No. of Thread Starts	Travel Distance per Turn	Bolt Circle Dia.	Hardness	Dynamic Thrust Load Cap., lbs.	Max. Backlash	Temperature Range, °F		Each
Black-Oxide Alloy Steel
D	1"-4	2 11/32"	1 1/2"	1 1/2"	3 1/4"	5/8"	1	0.25"	2 3/4"	Rockwell C56	1,600	0.015"	-40° to 300°	00000000	0000000

Flange Ball Nuts—Left-Hand Threaded

						Flange
	Thread Size	Lg.	Wd.	Ht.	Dia.	Dia.	Thick.	No. of Thread Starts	Travel Distance per Turn	Bolt Circle Dia.	Hardness	Dynamic Thrust Load Cap., lbs.	Max. Backlash	Temperature Range, °F		Each
Black-Oxide Alloy Steel
D	1"-4	2 11/32"	1 1/2"	1 1/2"	1"	3 1/4"	5/8"	1	0.25"	2 3/4"	Rockwell C56	1,600	0.015"	-40° to 300°	00000000	0000000

Fast-Travel Ball Screws and Nuts

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.

Black-oxide alloy steel ball nuts have mild corrosion resistance.

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

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

Ball Screws—Right-Hand Threaded

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

Alloy Steel
Thread Size	Lg., ft.	No. of Thread Starts	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Root Dia.	Hardness	Tensile Strength, psi	Temperature Range, °F		Each
1"-4	2	2	0.5"	±0.004" per ft.	0.879"	Rockwell C56	85,000	-40° to 300°	00000000	0000000
1"-4	2	4	1"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	3	2	0.5"	±0.004" per ft.	0.879"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	3	4	1"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	4	2	0.5"	±0.004" per ft.	0.879"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	4	4	1"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	5	2	0.5"	±0.004" per ft.	0.879"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	5	4	1"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	6	2	0.5"	±0.004" per ft.	0.879"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	6	4	1"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	7	2	0.5"	±0.004" per ft.	0.879"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	7	4	1"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	8	2	0.5"	±0.004" per ft.	0.879"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	8	4	1"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000

Externally Threaded Ball Nuts—Right-Hand Threaded

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.

Black-Oxide Alloy Steel
	Thread Size	Lg.	Wd.	Ht.	Dia.	No. of Thread Starts	Travel Distance per Turn	External Thread Size	Hardness	Dynamic Thrust Load Cap., lbs.	Max. Backlash	Temperature Range, °F		Each
A	1"-4	3 1/8"	__	__	1 11/16"	2	0.5"	1 9/16"-18	Rockwell C56	3,900	0.015"	-40° to 300°	00000000	0000000
B	1"-4	3"	1 1/2"	1 1/2"	__	4	1"	1 9/16"-18	Rockwell C56	2,350	0.015"	-40° to 300°	00000000	000000

Flange Ball Nuts—Right-Hand Threaded

						Flange
	Thread Size	Lg.	Wd.	Ht.	Dia.	Dia.	Thick.	No. of Thread Starts	Travel Distance per Turn	Bolt Circle Dia.	Hardness	Dynamic Thrust Load Cap., lbs.	Max. Backlash	Temperature Range, °F		Each
Black-Oxide Alloy Steel
C	1"-4	3 1/8"	__	__	1 11/16"	3 1/4"	5/8"	2	0.5"	2 3/4"	Rockwell C56	3,900	0.015"	-40° to 300°	00000000	0000000
D	1"-4	3"	1 1/2"	1 1/2"	__	3 1/4"	5/8"	4	1"	2 3/4"	Rockwell C56	2,350	0.015"	-40° to 300°	00000000	000000

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.

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

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

Ball Screws—Right-Hand Threaded

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

Black-Oxide Alloy Steel
Thread Size	Lg., ft.	No. of Thread Starts	Travel Distance per Turn	Root Dia.	Hardness	Tensile Strength, psi	Temperature Range, °F	No. of Pins Included		Each
1"-4	2	2	0.274"	0.84"	Rockwell C56	95,000	-65° to 300°	2	0000000	0000000
1"-4	3	2	0.274"	0.84"	Rockwell C56	95,000	-65° to 300°	2	0000000	000000
1"-4	4	2	0.274"	0.84"	Rockwell C56	95,000	-65° to 300°	2	0000000	000000

Externally Threaded Ball Nuts—Right-Hand Threaded

Black-Oxide Alloy Steel
Thread Size	Lg.	Dia.	No. of Thread Starts	Travel Distance per Turn	External Thread Size	Hardness	Dynamic Thrust Load Cap., lbs.	Max. Backlash	Temperature Range, °F		Each
1"-4	2 23/32"	1 5/8"	2	0.274"	1.563"-18	Rockwell C56	900	0.008"	-65° to 300°	0000000	0000000

Flange Ball Nuts—Right-Hand Threaded

			Flange
Thread Size	Lg.	Dia.	Dia.	Thick.	No. of Thread Starts	Travel Distance per Turn	Bolt Circle Dia.	Hardness	Dynamic Thrust Load Cap., lbs.	Max. Backlash	Temperature Range, °F		Each
Black-Oxide Alloy Steel
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	0000000

Clamping Acme Lead Screw Collars

Thread these one-piece collars onto an Acme lead screw to separate and position components, or use them as an end stop to limit travel. Tighten the clamping screw to secure.

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

Black-oxide carbon steel collars have mild corrosion resistance. 303 stainless steel collars have good corrosion resistance.

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

Right-Hand Threaded
Thread Size	OD	Wd.	No. of Thread Starts	Hardness		Each
Black-Oxide 1215 Carbon Steel
1"-4	1 3/4"	1/2"	1	Brinell 167	0000000	000000
303 Stainless Steel
1"-4	1 3/4"	1/2"	1	Brinell 228	0000000	00000

Two-Piece Clamping Acme Lead Screw Collars

Mount these two-piece collars anywhere on an Acme lead screw without removing components. Use them to separate and position components or as an end stop to limit travel. Tighten the clamping screw to secure.

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

Black-oxide carbon steel collars have mild corrosion resistance.

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

Right-Hand Threaded
Thread Size	OD	Wd.	No. of Thread Starts	Hardness		Each
Black-Oxide 1215 Carbon Steel
1"-4	1 3/4"	1/2"	1	Brinell 167	0000000	000000