1 1/2"-5 Lead Screws | McMaster-Carr

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31 Products

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"-5	18"	Acme	1:1	1	0.2"	±0.0003"/1"	Acme Class 2C	Brinell 126	53,000	99030A181	000000


	1 1/2"-5	3 ft.	Acme	1:1	1	0.2"	±0.0003"/1"	Acme Class 2C	Brinell 126	53,000	99030A182	000000
	1 1/2"-5	6 ft.	Acme	1:1	1	0.2"	±0.0003"/1"	Acme Class 2C	Brinell 126	53,000	99030A183	000000


	Black-Oxide 4140 Alloy Steel



			1 1/2"-5	3 ft.	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A655	000000


			1 1/2"-5	6 ft.	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A128	000000


			304 Stainless Steel



					1 1/2"-5	18"	Acme	1:1	1	0.2"	±0.0003"/1"	Acme Class 2C	Brinell 170	31,000	90497A170	000000


					1 1/2"-5	3 ft.	Acme	1:1	1	0.2"	±0.0003"/1"	Acme Class 2C	Brinell 170	31,000	90497A180	000000
					1 1/2"-5	6 ft.	Acme	1:1	1	0.2"	±0.0003"/1"	Acme Class 2C	Brinell 170	31,000	90497A190	00000000

Lead Screws—Left-Hand Thread


	Left-Hand Threads

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.

	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
Black-Oxide 4140 Alloy Steel



	1 1/2"-5	3	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A755	0000000


	1 1/2"-5	6	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A428	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.

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"-5	2 19/64"	2.125"	Acme	1:1	1	0.2"	1 31/32"-18	13/16"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	95072A121	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"-5	2 19/64"	2.125"	Acme	1:1	1	0.2"	1 31/32"-18	13/16"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	95072A225	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.

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

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.

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.

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"-5	Acme	12"	1	1:1	0.2"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A774	000000


	1 1/2"-5	Acme	3 ft.	1	1:1	0.2"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A889	00000
	1 1/2"-5	Acme	6 ft.	1	1:1	0.2"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A331	000000


	Alloy Steel



			1 1/2"-5	Acme	12"	1	1:1	0.2"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A990	00000


			1 1/2"-5	Acme	3 ft.	1	1:1	0.2"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A665	000000
			1 1/2"-5	Acme	6 ft.	1	1:1	0.2"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A345	000000


			18-8 Stainless Steel



					1 1/2"-5	Acme	3 ft.	1	1:1	0.2"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A877	000000


					1 1/2"-5	Acme	6 ft.	1	1:1	0.2"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A562	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"-5	Acme	3	1	1:1	0.2"	Acme Class 2G	SAE Grade 2	Rockwell B61	53,000	ASTM A108	98935A554	000000


	1 1/2"-5	Acme	6	1	1:1	0.2"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A555	000000


	Alloy Steel



			1 1/2"-5	Acme	3	1	1:1	0.2"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A556	000000


			1 1/2"-5	Acme	6	1	1:1	0.2"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A557	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.

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"-5	Acme	1 15/32"	2 3/8"	1	1:1	0.2"	Acme Class 2G	Rockwell B75	Not Rated	94815A121	000000


	Zinc-Plated Carbon Steel



			1 1/2"-5	Acme	1 15/32"	2 3/8"	1	1:1	0.2"	Acme Class 2G	Rockwell B75	Not Rated	98948A129	00000


			18-8 Stainless Steel



					1 1/2"-5	Acme	1 1/2"	2 1/4"	1	1:1	0.2"	Acme Class 2G	Rockwell B97	Not Rated	95066A175	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.

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		Each
Carbon Steel



	1 1/2"-5	Acme	1 1/2"	2 3/8"	1	1:1	0.2"	Acme Class 2G	SAE Grade 2	Rockwell B85	64,000	91808A123	000000