3/4"-6 Nuts | McMaster-Carr

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 Size	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



		3/4"-6	Acme	12"	1	1:1	0.167"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A732	00000


		3/4"-6	Acme	2 ft.	1	1:1	0.167"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A917	00000
		3/4"-6	Acme	3 ft.	1	1:1	0.167"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A838	00000
		3/4"-6	Acme	4 ft.	1	1:1	0.167"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A918	00000
		3/4"-6	Acme	6 ft.	1	1:1	0.167"	Acme Class 2G	SAE Grade 2	Rockwell B61	53,000	ASTM A108	98935A036	00000
		3/4"-6	Acme	8 ft.	1	1:1	0.167"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A919	00000
		3/4"-6	Acme	12 ft.	1	1:1	0.167"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A653	00000


		Zinc-Plated Carbon Steel



				3/4"-6	Acme	6"	1	1:1	0.167"	Acme Class 2G	SAE Grade 2	Rockwell B61	53,000	ASTM A108	93255A451	00000


				3/4"-6	Acme	12"	1	1:1	0.167"	Acme Class 2G	SAE Grade 2	Rockwell B61	68,000	ASTM A108	98941A750	00000
				3/4"-6	Acme	16"	1	1:1	0.167"	Acme Class 2G	SAE Grade 2	Rockwell B61	53,000	ASTM A108	93255A461	00000
				3/4"-6	Acme	18"	1	1:1	0.167"	Acme Class 2G	SAE Grade 2	Rockwell B61	53,000	ASTM A108	93255A463	00000
				3/4"-6	Acme	3 ft.	1	1:1	0.167"	Acme Class 2G	SAE Grade 2	Rockwell B61	68,000	ASTM A108	98941A440	00000
				3/4"-6	Acme	6 ft.	1	1:1	0.167"	Acme Class 2G	SAE Grade 2	Rockwell B61	68,000	ASTM A108	98941A270	00000


				Alloy Steel



						3/4"-6	Acme	6"	1	1:1	0.167"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93420A883	00000


						3/4"-6	Acme	12"	1	1:1	0.167"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A940	00000
						3/4"-6	Acme	2 ft.	1	1:1	0.167"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A118	00000
						3/4"-6	Acme	3 ft.	1	1:1	0.167"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A626	00000
						3/4"-6	Acme	4 ft.	1	1:1	0.167"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A119	00000
						3/4"-6	Acme	6 ft.	1	1:1	0.167"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A150	000000
						3/4"-6	Acme	8 ft.	1	1:1	0.167"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A121	000000
						3/4"-6	Acme	12 ft.	1	1:1	0.167"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A851	000000


						18-8 Stainless Steel



								3/4"-6	Acme	6"	1	1:1	0.167"	Acme Class 2G	—	Rockwell B96	Not Rated	—	94330A410	00000


								3/4"-6	Acme	12"	1	1:1	0.167"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A627	00000
								3/4"-6	Acme	18"	1	1:1	0.167"	Acme Class 2G	—	Rockwell B96	Not Rated	—	94330A480	00000
								3/4"-6	Acme	3 ft.	1	1:1	0.167"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A832	000000
								3/4"-6	Acme	6 ft.	1	1:1	0.167"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A214	000000
								3/4"-6	Acme	12 ft.	1	1:1	0.167"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A942	000000


								316 Stainless Steel



										3/4"-6	Acme	12"	1	1:1	0.167"	Acme Class 2G	ASTM Grade B8M	Rockwell B97	75,000	ASTM A193	97014A610	00000


3/4"-6	Acme									3 ft.	1	1:1	0.167"	Acme Class 2G	ASTM Grade B8M	Rockwell B97	75,000	ASTM A193	97014A330	000000
3/4"-6	Acme									6 ft.	1	1:1	0.167"	Acme Class 2G	ASTM Grade B8M	Rockwell B97	75,000	ASTM A193	97014A170	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



	3/4"-6	Acme	3	1	1:1	0.167"	Acme Class 2G	SAE Grade 2	Rockwell B61	53,000	ASTM A108	98935A449	000000


	3/4"-6	Acme	6	1	1:1	0.167"	Acme Class 2G	SAE Grade 2	Rockwell B61	53,000	ASTM A108	98935A450	00000


	Alloy Steel



			3/4"-6	Acme	3	1	1:1	0.167"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A454	00000


			3/4"-6	Acme	6	1	1:1	0.167"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A455	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



		3/4"-6	Acme	3"	1	1:1	0.167"	2 1/2" to 3"	1 1/8"	15/32"	Acme Class 2G	SAE Grade 5	Rockwell C19	105,000	93097A240	000000


		3/4"-6	Acme	4"	1	1:1	0.167"	3 1/2" to 4"	1 1/8"	15/32"	Acme Class 2G	SAE Grade 5	Rockwell C19	105,000	93097A250	00000
		3/4"-6	Acme	6"	1	1:1	0.167"	5 1/2" to 6"	1 1/8"	15/32"	Acme Class 2G	SAE Grade 5	Rockwell C19	105,000	93097A260	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



	3/4"-6	Acme	2 1/4"	1"	1	1:1	0.167"	Acme Class 2G	Rockwell B75	Not Rated	93023A663	000000


	18-8 Stainless Steel



			3/4"-6	Acme	2 1/4"	1"	1	1:1	0.167"	Acme Class 2G	Not Rated	Not Rated	93030A113	00000

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



	3/4"-6	Acme	2 1/4"	1"	1	1:1	0.167"	Acme Class 2G	Rockwell B75	Not Rated	93026A652	000000

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



		3/4"-6	Acme	1 1/2"	1"	2"	3/8"	1	1:1	0.167"	Acme Class 2G	Not Rated	Not Rated	95120A127	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



		3/4"-6	Acme	1 1/2"	1"	2"	3/8"	1	1:1	0.167"	Acme Class 2G	Not Rated	Not Rated	95120A527	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



	3/4"-6	Acme	1 1/2"	2 15/64"	1	1:1	0.167"	Acme Class 2G	Rockwell B96	Not Rated	—	95080A113	000000


	360 Brass



			3/4"-6	Acme	3/4"	1 1/4"	1	1:1	0.167"	Acme Class 2G	Rockwell B55	Not Rated	ASTM B16	95100A109	00000


			932 Bearing Bronze



					3/4"-6	Acme	1 17/64"	1 13/32"	1	1:1	0.167"	Acme Class 2G	Not Rated	Not Rated	ASTM B505	95090A117	00000

Round Nuts—Left-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



	3/4"-6	Acme	1 1/2"	2 15/64"	1	1:1	0.167"	Acme Class 2G	Rockwell B96	Not Rated	—	95080A413	000000


	360 Brass



			3/4"-6	Acme	3/4"	1 1/4"	1	1:1	0.167"	Acme Class 2G	Rockwell B55	Not Rated	ASTM B16	95100A409	00000


			932 Bearing Bronze



					3/4"-6	Acme	1 9/32"	1 13/32"	1	1:1	0.167"	Acme Class 2G	Not Rated	Not Rated	ASTM B505	95090A417	00000

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



	3/4"-6	Acme	47/64"	1 1/4"	1	1:1	0.167"	Acme Class 2G	Rockwell B75	Not Rated	—	94815A109	00000


	Zinc-Plated Carbon Steel



			3/4"-6	Acme	3/4"	1 1/4"	1	1:1	0.167"	Acme Class 2G	Rockwell B75	Not Rated	—	98948A750	00000


			360 Brass



					3/4"-6	Acme	3/4"	1 1/4"	1	1:1	0.167"	Acme Class 2G	Rockwell B75	Not Rated	ASTM B16	95155A127	00000


					18-8 Stainless Steel



							3/4"-6	Acme	47/64"	1 1/4"	1	1:1	0.167"	Acme Class 2G	Not Rated	Not Rated	—	95066A217	00000

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.

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	Fastener Strength Grade/Class	Hardness	Tensile Strength, psi	Specs. Met		Each
Carbon Steel



	3/4"-6	Acme	47/64"	1 1/4"	1	1:1	0.167"	Acme Class 2G	SAE Grade 2	Rockwell B85	64,000	—	91808A109	00000


	Zinc-Plated Carbon Steel



			3/4"-6	Acme	3/4"	1 1/4"	1	1:1	0.167"	Acme Class 2G	—	Rockwell B75	Not Rated	—	98948A150	00000


			360 Brass



					3/4"-6	Acme	3/4"	1 1/4"	1	1:1	0.167"	Acme Class 2G	—	Rockwell B75	Not Rated	ASTM B16	95155A327	00000


					18-8 Stainless Steel



							3/4"-6	Acme	47/64"	1 1/4"	1	1:1	0.167"	Acme Class 2G	—	Not Rated	Not Rated	—	95066A417	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



	3/4"-6	Acme	3/4"	1 1/4"	1	1:1	0.167"	Acme Class 2G	Rockwell B55	Not Rated	ASTM B16	95270A127	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



	3/4"-6	Acme	3/4"	1 1/4"	1	1:1	0.167"	Acme Class 2G	Rockwell B55	Not Rated	ASTM B16	95270A527	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



	3/4"-6	Acme	1 1/8"	9 1/2"	1	1:1	0.167"	Acme Class 2G	Rockwell B72	Not Rated	92428A630	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



	3/4"-6	Acme	1 1/8"	9 1/2"	1	1:1	0.167"	Acme Class 2G	Rockwell B72	Not Rated	92428A120	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



	3/4"-6	3 ft.	Acme	1:1	1	0.167"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A017	000000


	3/4"-6	6 ft.	Acme	1:1	1	0.167"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A117	000000


	Black-Oxide 4140 Alloy Steel



			3/4"-6	18"	Acme	1:1	1	0.167"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A307	00000


			3/4"-6	3 ft.	Acme	1:1	1	0.167"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A637	00000
			3/4"-6	6 ft.	Acme	1:1	1	0.167"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A113	000000


			304 Stainless Steel



					3/4"-6	3 ft.	Acme	1:1	1	0.167"	±0.009"/1 ft.	Acme Class 2C	Brinell 150	72,000	98980A144	000000


					3/4"-6	6 ft.	Acme	1:1	1	0.167"	±0.009"/1 ft.	Acme Class 2C	Brinell 150	72,000	98980A393	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



	3/4"-6	3	Acme	1:1	1	0.167"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A417	000000


	3/4"-6	6	Acme	1:1	1	0.167"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A517	000000


	Black-Oxide 4140 Alloy Steel



			3/4"-6	3	Acme	1:1	1	0.167"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A737	00000


			3/4"-6	6	Acme	1:1	1	0.167"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A413	000000


			304 Stainless Steel



					3/4"-6	3	Acme	1:1	1	0.167"	±0.009"/1 ft.	Acme Class 2C	Brinell 150	72,000	98980A113	000000


					3/4"-6	6	Acme	1:1	1	0.167"	±0.009"/1 ft.	Acme Class 2C	Brinell 150	72,000	98980A693	000000

Lead Screws—Right-Hand and Left-Hand Thread


	Right-Hand-and-Left-Hand Threads

Right-hand-and-left-hand threaded lead screws have right-hand threads on one end and left-hand threads on the other. Use them where you want to drive nuts in opposite directions at the same time, such as for widening and narrowing chutes on packing and assembly lines. Note: A short length of threading at the center of the lead screw is not usable.

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.

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.

					Usable Thread Lg.
	Thread Size	Lg., ft.	Thread Type	Speed Ratio	Right-Hand	Left-Hand	No. of Thread Starts	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength, psi		Each
Black-Oxide 4140 Alloy Steel



		3/4"-6	3	Acme	1:1	16 1/2"	16 1/2"	1	0.167"	±0.0003"/1"	Acme Class 2C	Brinell 200	95,000	99015A280	0000000

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.

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.

	Lg.	Dia.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength	Dynamic Thrust Load Cap., lb.	Temp., ° F		Each
Iron



	3/4"-6	1 1/2"	2.234"	Acme	1:1	1	0.167"	Acme Class 2C	Brinell 217	Not Rated	Not Rated	—	95365A127	000000


	932 Bearing Bronze



			3/4"-6	1 1/2"	2.234"	Acme	1:1	1	0.167"	Acme Class 2C	Brinell 65	Not Rated	2,900	—	1343K128	000000


			PET



					3/4"-6	1 1/2"	2.234"	Acme	1:1	1	0.167"	Acme Class 2C	Not Rated	Not Rated	1,450	15 to 175	1349K129	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.

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.

	Lg.	Dia.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength	Dynamic Thrust Load Cap., lb.	Temp., ° F		Each
Iron



	3/4"-6	1 1/2"	2.234"	Acme	1:1	1	0.167"	Acme Class 2C	Brinell 217	Not Rated	Not Rated	—	95365A327	000000


	932 Bearing Bronze



			3/4"-6	1 1/2"	2.234"	Acme	1:1	1	0.167"	Acme Class 2C	Brinell 65	Not Rated	2,900	—	1343K228	000000


			PET



					3/4"-6	1 1/2"	2.234"	Acme	1:1	1	0.167"	Acme Class 2C	Not Rated	Not Rated	1,450	15 to 175	1349K131	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.

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

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.

PEEK—PEEK plastic nuts handle twice as much heat as PET and acetal plastic nuts. They have good chemical resistance and excellent 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, psi	Dynamic Thrust Load Cap., lb.	Temp., ° F		Each
360 Brass



		3/4"-6	1 1/4"	1.125"	Acme	1:1	1	0.166"	1"-18	1/2"	Acme Class 2C	Brinell 141	50,000	2,800	—	95072A174	000000


		673 Bronze



				3/4"-6	1 1/4"	1.125"	Acme	1:1	1	0.167"	1"-18	1/2"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	—	95072A113	00000


				PET



						3/4"-6	1 1/4"	1.125"	Acme	1:1	1	0.167"	1"-18	1/2"	Acme Class 2C	Not Rated	Not Rated	1,450	15 to 175	95075A113	00000


						PEEK



								3/4"-6	1 1/4"	1.125"	Acme	1:1	1	0.166"	1"-18	1/2"	Acme Class 2C	Not Rated	16,000	1,400	-40 to 525	90493A180	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



		3/4"-6	1 1/4"	1.125"	Acme	1:1	1	0.167"	1"-18	1/2"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	95072A213	000000

Flange Nuts—Right-Hand Thread

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

Flange 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.

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



		3/4"-6	2 1/4"	1.375"	2 5/8"	9/16"	Acme	1:1	1	0.167"	Acme Class 2C	Brinell 65	35,000	2,800	97790A130	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



	3/4"-6	2 1/4"	2 5/8"	1 5/8"	15/16"	Acme	1:1	1	0.167"	Acme Class 2C	Brinell 65	Not Rated	2,800	1710K47	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



	3/4"-6	2 1/4"	2 5/8"	1 5/8"	15/16"	Acme	1:1	1	0.167"	Acme Class 2C	Brinell 65	Not Rated	2,800	1710K7	0000000

Flanges

Image of Attribute. Front orientation. Contains Annotated.

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

1215 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
1215 Carbon Steel



	1"-18	2 5/8"	17/32"	2 3/32"	Not Rated	95082A643	000000


	303 Stainless Steel



			1"-18	2 5/8"	17/32"	2 3/32"	Brinell 140	1329K13	00000

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.

Black-Oxide 4140 Alloy Steel—Black-oxide alloy steel lead screws are hard and strong. They have mild 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



	3/4"-6	3	Acme	2:1	2	0.333"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A012	000000


	3/4"-6	6	Acme	2:1	2	0.333"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A112	00000


	Black-Oxide 4140 Alloy Steel



			3/4"-6	3	Acme	2:1	2	0.333"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A617	00000


			3/4"-6	6	Acme	2:1	2	0.333"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A117	000000

Lead Screws—Left-Hand Thread

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.

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



	3/4"-6	3	Acme	2:1	2	0.333"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A412	000000


	3/4"-6	6	Acme	2:1	2	0.333"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A512	00000


	Black-Oxide 4140 Alloy Steel



			3/4"-6	3	Acme	2:1	2	0.333"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A717	00000


			3/4"-6	6	Acme	2:1	2	0.333"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A417	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



		3/4"-6	1 1/4"	1.125"	Acme	2:1	2	0.333"	1"-18	1/2"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	95072A601	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



		3/4"-6	1 1/4"	1.125"	Acme	2:1	2	0.333"	1"-18	1/2"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	95072A602	000000

Flanges

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

1215 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
1215 Carbon Steel



	1"-18	2 5/8"	17/32"	2 3/32"	Not Rated	95082A643	000000


	303 Stainless Steel



			1"-18	2 5/8"	17/32"	2 3/32"	Brinell 140	1329K13	00000

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.

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

	No. of Thread Starts	Hardness		Each
Right-Hand Thread







	Black-Oxide 12L14 Carbon Steel

	3/4"-6	2"	5/8"	1	Brinell 163	6698K15	000000




			303 Stainless Steel

			3/4"-6	1 1/2"	1/2"	1	Brinell 228	2228N13	00000


			Left-Hand Thread







							Black-Oxide 12L14 Carbon Steel

							3/4"-6	2"	5/8"	1	Brinell 163	6698K62	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, size, and number of thread starts as your lead screw.

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

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

	No. of Thread Starts	Hardness		Each
Right-Hand Thread







	Black-Oxide 12L14 Carbon Steel

	3/4"-6	2"	5/8"	1	Brinell 163	2224N17	000000




			303 Stainless Steel

			3/4"-6	1 1/2"	1/2"	1	Brinell 228	2207N21	00000