1 1/2"-4 Bolts | McMaster-Carr

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30,000 psi to 99,999 psi

100,000 psi or greater

Not Rated

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Number of Thread Starts

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2 1/4"

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91 Products

Acme 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, thread size, and number of thread starts.

Lead Screws—Right-Hand Thread

Carbon Steel—Carbon steel components are easier to machine than alloy steel components.

Zinc-Plated Carbon Steel—Zinc-plated carbon steel components have mild corrosion resistance and are easier to machine than alloy steel components.

Alloy Steel—Alloy steel components are harder and stronger than carbon steel components.

18-8 Stainless Steel—18-8 stainless steel components have good corrosion resistance.

316 Stainless Steel—316 stainless steel components have excellent corrosion resistance.

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

	Thread Type	Lg.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Fastener Strength Grade/Class	Hardness	Tensile Strength, psi	Specs. Met		Each
Carbon Steel



	1 1/2"-4	Acme	12"	1	1:1	0.25"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A771	000000


	1 1/2"-4	Acme	2 ft.	1	1:1	0.25"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A924	00000
	1 1/2"-4	Acme	3 ft.	1	1:1	0.25"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A885	00000
	1 1/2"-4	Acme	4 ft.	1	1:1	0.25"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A925	00000
	1 1/2"-4	Acme	6 ft.	1	1:1	0.25"	Acme Class 2G	SAE Grade 2	Rockwell B61	53,000	ASTM A108	98935A113	000000
	1 1/2"-4	Acme	8 ft.	1	1:1	0.25"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A926	000000
	1 1/2"-4	Acme	12 ft.	1	1:1	0.25"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A692	000000


	Zinc-Plated Carbon Steel



			1 1/2"-4	Acme	6"	1	1:1	0.25"	Acme Class 2G	SAE Grade 2	Rockwell B61	53,000	ASTM A108	93255A621	00000


			1 1/2"-4	Acme	12"	1	1:1	0.25"	Acme Class 2G	SAE Grade 2	Rockwell B61	68,000	ASTM A108	98941A770	00000
			1 1/2"-4	Acme	18"	1	1:1	0.25"	Acme Class 2G	SAE Grade 2	Rockwell B61	53,000	ASTM A108	93255A649	000000
			1 1/2"-4	Acme	3 ft.	1	1:1	0.25"	Acme Class 2G	SAE Grade 2	Rockwell B61	68,000	ASTM A108	98941A460	000000
			1 1/2"-4	Acme	6 ft.	1	1:1	0.25"	Acme Class 2G	SAE Grade 2	Rockwell B61	68,000	ASTM A108	98941A300	000000


			Alloy Steel



					1 1/2"-4	Acme	12"	1	1:1	0.25"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93420A750	000000


					1 1/2"-4	Acme	2 ft.	1	1:1	0.25"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A128	000000
					1 1/2"-4	Acme	3 ft.	1	1:1	0.25"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A660	000000
					1 1/2"-4	Acme	4 ft.	1	1:1	0.25"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A129	000000
					1 1/2"-4	Acme	6 ft.	1	1:1	0.25"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A250	000000
					1 1/2"-4	Acme	8 ft.	1	1:1	0.25"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A131	000000
					1 1/2"-4	Acme	12 ft.	1	1:1	0.25"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A877	000000


					18-8 Stainless Steel



							1 1/2"-4	Acme	3 ft.	1	1:1	0.25"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A871	000000


							1 1/2"-4	Acme	6 ft.	1	1:1	0.25"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A216	000000


							316 Stainless Steel



									1 1/2"-4	Acme	12"	1	1:1	0.25"	Acme Class 2G	ASTM Grade B8M	Rockwell B97	75,000	ASTM A193	97014A630	000000


									1 1/2"-4	Acme	3 ft.	1	1:1	0.25"	Acme Class 2G	ASTM Grade B8M	Rockwell B97	75,000	ASTM A193	97014A350	000000
									1 1/2"-4	Acme	6 ft.	1	1:1	0.25"	Acme Class 2G	ASTM Grade B8M	Rockwell B97	75,000	ASTM A193	97014A200	000000

Lead Screws—Left-Hand Thread

Carbon Steel—Carbon steel components are easier to machine than alloy steel components.

Alloy Steel—Alloy steel components are harder and stronger than carbon steel components.

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

	Thread Type	Lg., ft.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Fastener Strength Grade/Class	Hardness	Tensile Strength, psi	Specs. Met		Each
Carbon Steel



	1 1/2"-4	Acme	3	1	1:1	0.25"	Acme Class 2G	SAE Grade 2	Rockwell B61	53,000	ASTM A108	98935A549	000000


	1 1/2"-4	Acme	6	1	1:1	0.25"	Acme Class 2G	SAE Grade 2	Rockwell B61	53,000	ASTM A108	98935A550	000000


	Alloy Steel



			1 1/2"-4	Acme	3	1	1:1	0.25"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A554	000000


			1 1/2"-4	Acme	6	1	1:1	0.25"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A555	000000

Hex-Head Screws—Right-Hand Thread

Hex head screws fasten heavy loads. They’re generally shorter than lead screws and can be tightened with a wrench. Length is measured from under the head.

Carbon Steel—Carbon steel components are easier to machine than alloy steel components.

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

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



		1 1/2"-4	Acme	3"	1	1:1	0.25"	2 1/2" to 3"	2 1/4"	15/16"	Acme Class 2G	SAE Grade 5	Rockwell C19	105,000	93097A370	000000


		1 1/2"-4	Acme	4"	1	1:1	0.25"	3 1/2" to 4"	2 1/4"	15/16"	Acme Class 2G	SAE Grade 5	Rockwell C19	105,000	93097A380	00000
		1 1/2"-4	Acme	6"	1	1:1	0.25"	5 1/2" to 6"	2 1/4"	15/16"	Acme Class 2G	SAE Grade 5	Rockwell C19	105,000	93097A390	00000

Coupling Nuts—Right-Hand Thread

Coupling nuts connect two lead screws.

Carbon Steel—Carbon steel components are easier to machine than alloy steel components.

18-8 Stainless Steel—18-8 stainless steel components have good corrosion resistance.

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

	Thread Type	Ht.	Wd.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength		Each
Carbon Steel



	1 1/2"-4	Acme	3 1/2"	2"	1	1:1	0.25"	Acme Class 2G	Rockwell B75	Not Rated	93023A674	000000


	18-8 Stainless Steel



			1 1/2"-4	Acme	3 1/2"	2"	1	1:1	0.25"	Acme Class 2G	Not Rated	Not Rated	93030A127	000000

Coupling Nuts—Left-Hand Thread

Coupling nuts connect two lead screws.

Carbon Steel—Carbon steel components are easier to machine than alloy steel components.

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

	Thread Type	Ht.	Wd.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength		Each
Carbon Steel



	1 1/2"-4	Acme	3 1/2"	2"	1	1:1	0.25"	Acme Class 2G	Rockwell B75	Not Rated	93026A659	0000000

Flange Nuts—Right-Hand Thread

Flange nuts move objects along the length of a lead screw. Flange nuts 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 or handle moves with one revolution of the lead screw.

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



		1 1/2"-4	Acme	3"	2 1/2"	3 1/2"	3/4"	1	1:1	0.25"	Acme Class 2G	Not Rated	Not Rated	95120A183	0000000

Flange Nuts—Left-Hand Thread

Flange nuts move objects along the length of a lead screw. Flange nuts 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 or handle moves with one revolution of the lead screw.

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



		1 1/2"-4	Acme	3"	2 1/2"	3 1/2"	3/4"	1	1:1	0.25"	Acme Class 2G	Not Rated	Not Rated	95120A583	0000000

Round Nuts—Right-Hand Thread

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

Cast Iron—Cast iron components have good machinability and high strength.

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

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 or handle moves with one revolution of the lead screw.

	Thread Type	Ht.	Dia.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength	Specs. Met		Each
Cast Iron



	1 1/2"-4	Acme	3"	4 15/32"	1	1:1	0.25"	Acme Class 2G	Rockwell B96	Not Rated	—	95080A132	0000000


	360 Brass



			1 1/2"-4	Acme	1 1/2"	2 1/2"	1	1:1	0.25"	Acme Class 2G	Rockwell B55	Not Rated	ASTM B16	95100A129	00000


			932 Bearing Bronze



					1 1/2"-4	Acme	3"	2 25/32"	1	1:1	0.25"	Acme Class 2G	Not Rated	Not Rated	ASTM B505	95090A133	000000

Hex Nuts—Right-Hand Thread

Hex nuts fasten and position lead screw components.

Carbon Steel—Carbon steel components are easier to machine than alloy steel components.

Zinc-Plated Carbon Steel—Zinc-plated carbon steel components have mild corrosion resistance and are easier to machine than alloy steel components.

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

18-8 Stainless Steel—18-8 stainless steel components have good corrosion resistance.

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

	Thread Type	Ht.	Wd.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength	Specs. Met		Each
Carbon Steel



	1 1/2"-4	Acme	1 15/32"	2 3/8"	1	1:1	0.25"	Acme Class 2G	Rockwell B75	Not Rated	—	94815A113	000000


	Zinc-Plated Carbon Steel



			1 1/2"-4	Acme	1 15/32"	2 3/8"	1	1:1	0.25"	Acme Class 2G	Rockwell B75	Not Rated	—	98948A128	00000


			360 Brass



					1 1/2"-4	Acme	1 1/2"	2 1/4"	1	1:1	0.25"	Acme Class 2G	Rockwell B75	Not Rated	ASTM B16	95155A167	00000


					18-8 Stainless Steel



							1 1/2"-4	Acme	1 15/32"	2 1/4"	1	1:1	0.25"	Acme Class 2G	Not Rated	Not Rated	—	95066A216	000000

Hex Nuts—Left-Hand Thread

Hex nuts fasten and position lead screw components.

Carbon Steel—Carbon steel components are easier to machine than alloy steel components.

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 or handle moves with one revolution of the lead screw.

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



	1 1/2"-4	Acme	1 15/32"	2 3/8"	1	1:1	0.25"	Acme Class 2G	SAE Grade 2	Rockwell B85	64,000	—	91808A113	000000


	360 Brass



			1 1/2"-4	Acme	1 1/2"	2 1/4"	1	1:1	0.25"	Acme Class 2G	—	Rockwell B75	Not Rated	ASTM B16	95155A367	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 or handle moves with one revolution of the lead screw.

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



	1 1/2"-4	Acme	1 1/2"	2 1/4"	1	1:1	0.25"	Acme Class 2G	Rockwell B55	Not Rated	ASTM B16	95270A167	000000

Square Nuts—Left-Hand Thread

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 or handle moves with one revolution of the lead screw.

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



	1 1/2"-4	Acme	1 1/2"	2 1/4"	1	1:1	0.25"	Acme Class 2G	Rockwell B55	Not Rated	ASTM B16	95270A567	000000

Flat Handles—Right-Hand Thread

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

Cast Iron—Cast iron components have good machinability and high strength.

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

	Thread Type	Ht.	Wd.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength		Each
Cast Iron



	1 1/2"-4	Acme	1 1/8"	9 1/2"	1	1:1	0.25"	Acme Class 2G	Rockwell B72	Not Rated	92428A710	000000

Ball Handles—Right-Hand Thread

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

Cast Iron—Cast iron components have good machinability and high strength.

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

	Thread Type	Ht.	Wd.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength		Each
Cast Iron



	1 1/2"-4	Acme	1 1/8"	9 1/2"	1	1:1	0.25"	Acme Class 2G	Rockwell B72	Not Rated	92428A170	000000

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, size, and number of thread starts as your lead screw.

Black-Oxide 12L14 Carbon Steel—Black-oxide carbon steel collars have mild corrosion resistance.

	No. of Thread Starts	Hardness		Each
Right-Hand Thread







	Black-Oxide 12L14 Carbon Steel

	1 1/2"-4	2 3/4"	3/4"	1	Brinell 163	6698K22	000000

Ball Screws and Nuts


	A	Ball Nuts Flange Nut Style D

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



	1 1/2"-4	2	1	0.25"	±0.007"/1 ft.	1.375"	Rockwell C56	200,000	-65 to 300	3405N311	0000000


	1 1/2"-4	3	1	0.25"	±0.007"/1 ft.	1.375"	Rockwell C56	200,000	-65 to 300	3405N312	000000
	1 1/2"-4	4	1	0.25"	±0.007"/1 ft.	1.375"	Rockwell C56	200,000	-65 to 300	3405N313	000000
	1 1/2"-4	5	1	0.25"	±0.007"/1 ft.	1.375"	Rockwell C56	200,000	-65 to 300	3405N314	000000
	1 1/2"-4	6	1	0.25"	±0.007"/1 ft.	1.375"	Rockwell C56	200,000	-65 to 300	3405N315	000000
	1 1/2"-4	7	1	0.25"	±0.007"/1 ft.	1.375"	Rockwell C56	200,000	-65 to 300	3405N316	000000
	1 1/2"-4	8	1	0.25"	±0.007"/1 ft.	1.375"	Rockwell C56	200,000	-65 to 300	3405N317	000000

Externally Threaded Ball Nuts—Right-Hand Threaded

Image of Product. A. Front orientation. Contains Annotated. Ball Screws and Nuts. Ball Screws and Nuts , Ball Nuts, Externally Threaded Nut, Style A.

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.

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



	A	1 1/2"-4	3"	2 3/32"	1	0.25"	1 31/32"-18	Rockwell C56	4,250	0.015"	-65 to 300	3405N462	0000000

Flange Ball Nuts—Right-Hand Threaded


Style D

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.	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	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	3405N473	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.

Lead Screws—Right-Hand Thread

1018 Low-Carbon Steel—Carbon steel lead screws and flanges have good machinability.

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., ft.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength, psi		Each
1018 Low-Carbon Steel



	1 1/2"-4	3	Acme	2:1	2	0.5"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A007	000000


	1 1/2"-4	6	Acme	2:1	2	0.5"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A107	000000

Lead Screws—Left-Hand Thread

1018 Low-Carbon Steel—Carbon steel lead screws and flanges have good machinability.

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., ft.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength, psi		Each
1018 Low-Carbon Steel



	1 1/2"-4	3	Acme	2:1	2	0.5"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A407	0000000


	1 1/2"-4	6	Acme	2:1	2	0.5"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A507	000000

Externally Threaded Nuts—Right-Hand Thread

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

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

673 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.

								External Thread
	Thread Size	Lg.	Dia.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn	Size	Lg.	Thread Fit	Hardness	Tensile Strength	Dynamic Thrust Load Cap.		Each
673 Bronze



		1 1/2"-4	2 19/64"	2.125"	Acme	2:1	2	0.5"	1 31/32"-18	13/16"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	95072A561	0000000

Externally Threaded Nuts—Left-Hand Thread

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

673 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.

								External Thread
	Thread Size	Lg.	Dia.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn	Size	Lg.	Thread Fit	Hardness	Tensile Strength	Dynamic Thrust Load Cap.		Each
673 Bronze



		1 1/2"-4	2 19/64"	2.125"	Acme	2:1	2	0.5"	1 31/32"-18	13/16"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	95072A562	0000000

Flanges

Image of Attribute. Front orientation. Contains Annotated.

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

1117 Carbon Steel—Carbon steel flanges have good machinability. However, they will rust when exposed to moisture.

303 Stainless Steel—303 stainless steel flanges have good corrosion resistance.

	Flange Dia.	Flange Thk.	Bolt Circle Dia.	Flange Hardness		Each
1117 Carbon Steel



	1 31/32"-18	4 13/64"	53/64"	3 7/16"	Brinell 156	95082A645	000000


	303 Stainless Steel



			1 31/32"-18	4 13/64"	53/64"	3 7/16"	Brinell 140	1329K15	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, thread size, and number of thread starts.

Lead Screws—Right-Hand Thread


	Right-Hand Threads

1018 Low-Carbon Steel—Carbon steel lead screws and flanges have good machinability.

Black-Oxide 4140 Alloy Steel—Black-oxide alloy steel lead screws are hard and strong. They have mild corrosion resistance and a dark surface color.

304 Stainless Steel—304 stainless steel lead screws have 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.

	Lg.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength, psi		Each
1018 Low-Carbon Steel



	1 1/2"-4	3 ft.	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A053	000000


	1 1/2"-4	6 ft.	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A153	000000


	Black-Oxide 4140 Alloy Steel



			1 1/2"-4	18"	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A401	00000


			1 1/2"-4	3 ft.	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A653	000000
			1 1/2"-4	6 ft.	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A127	000000


			304 Stainless Steel



					1 1/2"-4	3 ft.	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 150	72,000	98980A418	000000


					1 1/2"-4	6 ft.	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 150	72,000	98980A435	000000

Lead Screws—Left-Hand Thread


	Left-Hand Threads

1018 Low-Carbon Steel—Carbon steel lead screws and flanges have good machinability.

Black-Oxide 4140 Alloy Steel—Black-oxide alloy steel lead screws are hard and strong. They have mild corrosion resistance and a dark surface color.

304 Stainless Steel—304 stainless steel lead screws have 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.

	Lg., ft.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength, psi		Each
1018 Low-Carbon Steel



	1 1/2"-4	3	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A453	000000


	1 1/2"-4	6	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A553	000000


	Black-Oxide 4140 Alloy Steel



			1 1/2"-4	3	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A753	000000


			1 1/2"-4	6	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A427	000000


			304 Stainless Steel



					1 1/2"-4	3	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 150	72,000	98980A406	000000


					1 1/2"-4	6	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 150	72,000	98980A735	000000

Round Nuts—Right-Hand Thread

Iron—Iron nuts have good machinability and high strength.

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	Thread Fit	Hardness	Tensile Strength	Dynamic Thrust Load Cap., lb.		Each
Iron



	1 1/2"-4	3"	4.469"	Acme	1:1	1	0.25"	Acme Class 2C	Brinell 217	Not Rated	Not Rated	95365A147	0000000


	932 Bearing Bronze



			1 1/2"-4	3"	4.469"	Acme	1:1	1	0.25"	Acme Class 2C	Brinell 65	Not Rated	12,000	1343K118	000000

Round Nuts—Left-Hand Thread

Iron—Iron nuts have good machinability and high strength.

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	Thread Fit	Hardness	Tensile Strength	Dynamic Thrust Load Cap., lb.		Each
Iron



	1 1/2"-4	3"	4.469"	Acme	1:1	1	0.25"	Acme Class 2C	Brinell 217	Not Rated	Not Rated	95365A347	0000000


	932 Bearing Bronze



			1 1/2"-4	3"	4.469"	Acme	1:1	1	0.25"	Acme Class 2C	Brinell 65	Not Rated	12,000	1343K218	000000

Externally Threaded Nuts—Right-Hand Thread

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

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

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

PET—PET plastic nuts are lightweight and corrosion resistant.

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	Size	Lg.	Thread Fit	Hardness	Tensile Strength	Dynamic Thrust Load Cap., lb.	Temp., ° F		Each
673 Bronze



		1 1/2"-4	2 19/64"	2.125"	Acme	1:1	1	0.25"	1 31/32"-18	13/16"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	—	95072A119	0000000


		PET



				1 1/2"-4	2 19/64"	2.125"	Acme	1:1	1	0.25"	1 31/32"-18	13/16"	Acme Class 2C	Not Rated	Not Rated	6,000	15 to 175	95075A219	000000

Externally Threaded Nuts—Left-Hand Thread

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

673 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.

								External Thread
	Thread Size	Lg.	Dia.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn	Size	Lg.	Thread Fit	Hardness	Tensile Strength	Dynamic Thrust Load Cap.		Each
673 Bronze



		1 1/2"-4	2 19/64"	2.125"	Acme	1:1	1	0.25"	1 31/32"-18	13/16"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	95072A219	0000000

Platform Nuts—Left-Hand Thread

Image of Product. Front orientation. Contains Annotated. Precision Lead Screws and Nuts. Precision Acme Lead Screws and Nuts, Platform Nuts—Left-Hand Thread.

Platform nuts have wide, machinable surfaces for custom mounting.

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.	Wd.	Ht.	Ctr. Ht.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength	Dynamic Thrust Load Cap., lb.		Each
932 Bearing Bronze



	1 1/2"-4	4 1/2"	3 5/8"	2 9/16"	1 1/2"	Acme	1:1	1	0.25"	Acme Class 2C	Brinell 65	Not Rated	11,000	1710K43	0000000

Platform Nuts—Right-Hand Thread

Image of Product. Front orientation. Contains Annotated. Precision Lead Screws and Nuts. Precision Acme Lead Screws and Nuts, Platform Nuts—Right-Hand Thread.

Platform nuts have wide, machinable surfaces for custom mounting.

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.	Wd.	Ht.	Ctr. Ht.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength	Dynamic Thrust Load Cap., lb.		Each
932 Bearing Bronze



	1 1/2"-4	4 1/2"	3 5/8"	2 9/16"	1 1/2"	Acme	1:1	1	0.25"	Acme Class 2C	Brinell 65	Not Rated	11,000	1710K3	0000000

Flanges

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

1117 Carbon Steel—Carbon steel flanges have good machinability. However, they will rust when exposed to moisture.

Black-Oxide 1117 Carbon Steel—Black-oxide carbon steel flanges have mild corrosion resistance in dry environments and a dark surface color.

303 Stainless Steel—303 stainless steel flanges have good corrosion resistance.

	Flange Dia.	Flange Thk.	Bolt Circle Dia.	Flange Hardness		Each
1117 Carbon Steel



	1 31/32"-18	4 13/64"	53/64"	3 7/16"	Brinell 156	95082A645	000000


	Black-Oxide 1117 Carbon Steel



			1 31/32"-18	4 13/64"	53/64"	3 7/16"	Brinell 135	1329K105	00000


			303 Stainless Steel



					1 31/32"-18	4 13/64"	53/64"	3 7/16"	Brinell 140	1329K15	000000

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, size, and number of thread starts as your lead screw.

Black-Oxide 1215 Carbon Steel—Black-oxide carbon steel collars have mild corrosion resistance.

	No. of Thread Starts	Hardness		Each
Right-Hand Thread







	Black-Oxide 1215 Carbon Steel

	1 1/2"-4	2 3/8"	9/16"	1	Brinell 167	2207N18	000000