5/8"-8 Rods | McMaster-Carr

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97 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



	5/8"-8	Acme	12"	1	1:1	0.125"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A724	00000


	5/8"-8	Acme	2 ft.	1	1:1	0.125"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A914	0000
	5/8"-8	Acme	3 ft.	1	1:1	0.125"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A829	00000
	5/8"-8	Acme	4 ft.	1	1:1	0.125"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A915	00000
	5/8"-8	Acme	6 ft.	1	1:1	0.125"	Acme Class 2G	SAE Grade 2	Rockwell B61	53,000	ASTM A108	98935A035	00000
	5/8"-8	Acme	8 ft.	1	1:1	0.125"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A916	00000
	5/8"-8	Acme	12 ft.	1	1:1	0.125"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A642	00000


	Zinc-Plated Carbon Steel



			5/8"-8	Acme	6"	1	1:1	0.125"	Acme Class 2G	SAE Grade 2	Rockwell B61	53,000	ASTM A108	93255A441	00000


			5/8"-8	Acme	12"	1	1:1	0.125"	Acme Class 2G	SAE Grade 2	Rockwell B61	68,000	ASTM A108	98941A740	00000
			5/8"-8	Acme	3 ft.	1	1:1	0.125"	Acme Class 2G	SAE Grade 2	Rockwell B61	68,000	ASTM A108	98941A430	00000
			5/8"-8	Acme	6 ft.	1	1:1	0.125"	Acme Class 2G	SAE Grade 2	Rockwell B61	68,000	ASTM A108	98941A260	00000


			Alloy Steel



					5/8"-8	Acme	6"	1	1:1	0.125"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93420A210	00000


					5/8"-8	Acme	12"	1	1:1	0.125"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A932	00000
					5/8"-8	Acme	2 ft.	1	1:1	0.125"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A115	00000
					5/8"-8	Acme	3 ft.	1	1:1	0.125"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A620	00000
					5/8"-8	Acme	4 ft.	1	1:1	0.125"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A116	00000
					5/8"-8	Acme	6 ft.	1	1:1	0.125"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A130	00000
					5/8"-8	Acme	8 ft.	1	1:1	0.125"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A117	000000
					5/8"-8	Acme	12 ft.	1	1:1	0.125"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A845	000000


					18-8 Stainless Steel



							5/8"-8	Acme	6"	1	1:1	0.125"	Acme Class 2G	—	Rockwell B96	Not Rated	—	94330A210	00000


							5/8"-8	Acme	12"	1	1:1	0.125"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A621	00000
							5/8"-8	Acme	3 ft.	1	1:1	0.125"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A825	00000
							5/8"-8	Acme	6 ft.	1	1:1	0.125"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A213	000000
							5/8"-8	Acme	12 ft.	1	1:1	0.125"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A935	000000


							316 Stainless Steel



									5/8"-8	Acme	12"	1	1:1	0.125"	Acme Class 2G	ASTM Grade B8M	Rockwell B97	75,000	ASTM A193	97014A600	00000


									5/8"-8	Acme	3 ft.	1	1:1	0.125"	Acme Class 2G	ASTM Grade B8M	Rockwell B97	75,000	ASTM A193	97014A320	00000
									5/8"-8	Acme	6 ft.	1	1:1	0.125"	Acme Class 2G	ASTM Grade B8M	Rockwell B97	75,000	ASTM A193	97014A150	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



	5/8"-8	Acme	3	1	1:1	0.125"	Acme Class 2G	SAE Grade 2	Rockwell B61	53,000	ASTM A108	98935A429	000000


	5/8"-8	Acme	6	1	1:1	0.125"	Acme Class 2G	SAE Grade 2	Rockwell B61	53,000	ASTM A108	98935A430	00000


	Alloy Steel



			5/8"-8	Acme	3	1	1:1	0.125"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A434	00000


			5/8"-8	Acme	6	1	1:1	0.125"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A435	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



		5/8"-8	Acme	3"	1	1:1	0.125"	2 1/2" to 3"	15/16"	25/64"	Acme Class 2G	SAE Grade 5	Rockwell C19	105,000	93097A210	000000


		5/8"-8	Acme	4"	1	1:1	0.125"	3 1/2" to 4"	15/16"	25/64"	Acme Class 2G	SAE Grade 5	Rockwell C19	105,000	93097A220	00000
		5/8"-8	Acme	6"	1	1:1	0.125"	5 1/2" to 6"	15/16"	25/64"	Acme Class 2G	SAE Grade 5	Rockwell C19	105,000	93097A230	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



	5/8"-8	Acme	2 1/8"	7/8"	1	1:1	0.125"	Acme Class 2G	Rockwell B75	Not Rated	93023A662	000000


	18-8 Stainless Steel



			5/8"-8	Acme	2 1/8"	7/8"	1	1:1	0.125"	Acme Class 2G	Not Rated	Not Rated	93030A109	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



	5/8"-8	Acme	2 1/8"	7/8"	1	1:1	0.125"	Acme Class 2G	Rockwell B75	Not Rated	93026A651	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



		5/8"-8	Acme	1 1/4"	7/8"	1 1/2"	1/4"	1	1:1	0.125"	Acme Class 2G	Not Rated	Not Rated	95120A119	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



		5/8"-8	Acme	1 1/4"	7/8"	1 1/2"	1/4"	1	1:1	0.125"	Acme Class 2G	Not Rated	Not Rated	95120A519	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



	5/8"-8	Acme	1 1/4"	1 55/64"	1	1:1	0.125"	Acme Class 2G	Rockwell B96	Not Rated	—	95080A108	000000


	360 Brass



			5/8"-8	Acme	5/8"	1"	1	1:1	0.125"	Acme Class 2G	Rockwell B55	Not Rated	ASTM B16	95100A105	00000


			932 Bearing Bronze



					5/8"-8	Acme	1 1/32"	1 9/32"	1	1:1	0.125"	Acme Class 2G	Not Rated	Not Rated	ASTM B505	95090A108	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



	5/8"-8	Acme	1 1/4"	1 55/64"	1	1:1	0.125"	Acme Class 2G	Rockwell B96	Not Rated	—	95080A408	000000


	360 Brass



			5/8"-8	Acme	5/8"	1"	1	1:1	0.125"	Acme Class 2G	Rockwell B55	Not Rated	ASTM B16	95100A405	00000


			932 Bearing Bronze



					5/8"-8	Acme	1 1/32"	1 9/32"	1	1:1	0.125"	Acme Class 2G	Not Rated	Not Rated	ASTM B505	95090A408	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



	5/8"-8	Acme	39/64"	1 1/16"	1	1:1	0.125"	Acme Class 2G	Rockwell B75	Not Rated	—	94815A108	00000


	Zinc-Plated Carbon Steel



			5/8"-8	Acme	5/8"	1 1/16"	1	1:1	0.125"	Acme Class 2G	Rockwell B75	Not Rated	—	98948A740	00000


			360 Brass



					5/8"-8	Acme	5/8"	1"	1	1:1	0.125"	Acme Class 2G	Rockwell B75	Not Rated	ASTM B16	95155A119	00000


					18-8 Stainless Steel



							5/8"-8	Acme	39/64"	1 1/16"	1	1:1	0.125"	Acme Class 2G	Not Rated	Not Rated	—	95066A213	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



	5/8"-8	Acme	39/64"	1 1/16"	1	1:1	0.125"	Acme Class 2G	SAE Grade 2	Rockwell B85	64,000	—	91808A108	00000


	Zinc-Plated Carbon Steel



			5/8"-8	Acme	5/8"	1"	1	1:1	0.125"	Acme Class 2G	—	Rockwell B75	Not Rated	—	98948A140	00000


			360 Brass



					5/8"-8	Acme	5/8"	1"	1	1:1	0.125"	Acme Class 2G	—	Rockwell B75	Not Rated	ASTM B16	95155A319	00000


					18-8 Stainless Steel



							5/8"-8	Acme	39/64"	1 1/16"	1	1:1	0.125"	Acme Class 2G	—	Not Rated	Not Rated	—	95066A413	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



	5/8"-8	Acme	5/8"	1"	1	1:1	0.125"	Acme Class 2G	Rockwell B55	Not Rated	ASTM B16	95270A119	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



	5/8"-8	Acme	5/8"	1"	1	1:1	0.125"	Acme Class 2G	Rockwell B55	Not Rated	ASTM B16	95270A519	000000

Thumb Nuts—Right-Hand Thread

Thumb nuts fasten and position lead screw components. Thumb nuts 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



	5/8"-8	Acme	1 3/16"	2 3/4"	1	1:1	0.125"	Acme Class 2G	Rockwell B97	Not Rated	98675A119	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



	5/8"-8	Acme	1 1/8"	9 1/2"	1	1:1	0.125"	Acme Class 2G	Rockwell B72	Not Rated	92428A743	000000

Offset 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



	5/8"-8	Acme	2 1/4"	4 3/4"	1	1:1	0.125"	Acme Class 2G	Rockwell B67	Not Rated	98890A119	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



	5/8"-8	3 ft.	Acme	1:1	1	0.125"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A009	000000


	5/8"-8	6 ft.	Acme	1:1	1	0.125"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A109	00000


	Black-Oxide 4140 Alloy Steel



			5/8"-8	18"	Acme	1:1	1	0.125"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A306	00000


			5/8"-8	3 ft.	Acme	1:1	1	0.125"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A633	00000
			5/8"-8	6 ft.	Acme	1:1	1	0.125"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A109	000000


			304 Stainless Steel



					5/8"-8	3 ft.	Acme	1:1	1	0.125"	±0.009"/1 ft.	Acme Class 2C	Brinell 150	72,000	98980A140	00000


					5/8"-8	6 ft.	Acme	1:1	1	0.125"	±0.009"/1 ft.	Acme Class 2C	Brinell 150	72,000	98980A385	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



	5/8"-8	3	Acme	1:1	1	0.125"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A409	000000


	5/8"-8	6	Acme	1:1	1	0.125"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A509	00000


	Black-Oxide 4140 Alloy Steel



			5/8"-8	3	Acme	1:1	1	0.125"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A733	00000


			5/8"-8	6	Acme	1:1	1	0.125"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A409	000000


			304 Stainless Steel



					5/8"-8	3	Acme	1:1	1	0.125"	±0.009"/1 ft.	Acme Class 2C	Brinell 150	72,000	98980A240	00000


					5/8"-8	6	Acme	1:1	1	0.125"	±0.009"/1 ft.	Acme Class 2C	Brinell 150	72,000	98980A100	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



		5/8"-8	3	Acme	1:1	16 1/2"	16 1/2"	1	0.125"	±0.0003"/1"	Acme Class 2C	Brinell 200	95,000	99015A270	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



	5/8"-8	1 1/4"	1.859"	Acme	1:1	1	0.125"	Acme Class 2C	Brinell 217	Not Rated	Not Rated	—	95365A119	000000


	932 Bearing Bronze



			5/8"-8	1 1/4"	1.859"	Acme	1:1	1	0.125"	Acme Class 2C	Brinell 65	Not Rated	2,000	—	1343K132	00000


			PET



					5/8"-8	1 1/4"	1.859"	Acme	1:1	1	0.125"	Acme Class 2C	Not Rated	Not Rated	1,000	15 to 175	1349K136	00000

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



	5/8"-8	1 1/4"	1.859"	Acme	1:1	1	0.125"	Acme Class 2C	Brinell 217	Not Rated	Not Rated	—	95365A319	000000


	932 Bearing Bronze



			5/8"-8	1 1/4"	1.859"	Acme	1:1	1	0.125"	Acme Class 2C	Brinell 65	Not Rated	2,000	—	1343K232	00000


			PET



					5/8"-8	1 1/4"	1.859"	Acme	1:1	1	0.125"	Acme Class 2C	Not Rated	Not Rated	1,000	15 to 175	1349K137	00000

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



		5/8"-8	1"	1.125"	Acme	1:1	1	0.125"	15/16"-16	1/2"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	—	95072A111	000000


		PET



				5/8"-8	1"	1.125"	Acme	1:1	1	0.125"	15/16"-16	1/2"	Acme Class 2C	Not Rated	Not Rated	1,000	15 to 175	95075A109	00000

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



		5/8"-8	1"	1.125"	Acme	1:1	1	0.125"	15/16"-16	1/2"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	95072A211	000000

Flanges

Image of Attribute. Front orientation. Contains Annotated.

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

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

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
Black-Oxide 1117 Carbon Steel



	15/16"-16	2 39/64"	17/32"	2 3/32"	Brinell 135	1329K102	000000


	1215 Carbon Steel



			15/16"-16	2 5/8"	17/32"	2 3/32"	Not Rated	95082A642	00000


			303 Stainless Steel



					15/16"-16	2 5/8"	17/32"	2 3/32"	Brinell 140	1329K12	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.

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



	5/8"-8	3	Acme	2:1	2	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A072	000000


	5/8"-8	6	Acme	2:1	2	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A172	00000

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



	5/8"-8	3	Acme	2:1	2	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A472	000000


	5/8"-8	6	Acme	2:1	2	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A572	00000

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.

360 Brass—360 brass nuts 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 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.		Each
360 Brass



		5/8"-8	1"	1.125"	Acme	2:1	2	0.25"	15/16"-16	1/2"	Acme Class 2C	Brinell 130	Not Rated	1,900	95072A321	000000

Externally Threaded Nuts—Left-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.

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.		Each
360 Brass



		5/8"-8	1"	1.125"	Acme	2:1	2	0.25"	15/16"-16	1/2"	Acme Class 2C	Brinell 130	Not Rated	1,900	95072A322	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



	15/16"-16	2 5/8"	17/32"	2 3/32"	Not Rated	95082A642	000000


	303 Stainless Steel



			15/16"-16	2 5/8"	17/32"	2 3/32"	Brinell 140	1329K12	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

	5/8"-8	1 5/8"	1/2"	1	Brinell 163	6698K14	000000




			303 Stainless Steel

			5/8"-8	1 5/16"	7/16"	1	Brinell 228	2228N12	00000

Fast-Travel Ultra-Precision Lead Screws and Nuts


	Style B	Style C

Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start. Operating with less backlash (play) than Precision Acme Lead Screws and Nuts, these lead screws and nuts provide increased nut life and more reliable movement in automated systems. All components are corrosion resistant for use in harsh environments. To ensure compatibility, select components that have the same thread type, thread size, and number of thread starts.

Lead Screws—Right-Hand Thread

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	Hardness	Tensile Strength, psi		Each
303 Stainless Steel



	5/8"-8	3	Rounded Acme	4:1	4	0.5"	±0.0006"/1"	Brinell 160	90,000	6350K719	0000000


	5/8"-8	6	Rounded Acme	4:1	4	0.5"	±0.0006"/1"	Brinell 160	90,000	6350K107	000000

Flange Nuts—Right-Hand Thread


Style B	Style C


Style B	Style C

Acetal—Acetal nuts have good wear and corrosion resistance.

Wear-Compensating Spring—Flange nuts with wear-compensating internal O-ring or wear-compensating spring maintain a tight fit even when their threads begin to wear. They resist backlash to maintain accuracy over time, which is important in positioning applications such as 3D printing and robotics.

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
	Style	Thread Size	Lg.	Dia.	Dia.	Thk.	Thread Type	Speed Ratio	Bolt Circle Dia.	No. of Thread Starts	Travel Distance per Turn	Hardness	Tensile Strength, psi	Dynamic Thrust Load Cap., lb.	No. of Mounting Holes		Each
Acetal



		B	5/8"-8	1 1/2"	0.875"	1 1/2"	3/16"	Rounded Acme	4:1	1 3/16"	4	0.5"	Not Rated	9,700	220	3	6350K145	000000


		Acetal with Wear-Compensating Spring



				C	5/8"-8	2"	1.063"	1 51/64"	17/64"	Rounded Acme	4:1	1 3/8"	4	0.5"	Not Rated	9,700	35	3	6350K183	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.

	No. of Thread Starts	Hardness		Each
Right-Hand Thread







	Black-Oxide 12L14 Carbon Steel

	5/8"-8	1 5/8"	1/2"	1	Brinell 163	2224N16	000000