Acme Coupling Nuts | McMaster-Carr

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43 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.

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



	3/8"-12	Acme	1 7/8"	1/2"	1	1:1	0.083"	Acme Class 2G	Rockwell B75	Not Rated	93023A661	000000


	1/2"-10	Acme	1 1/4"	5/8"	1	1:1	0.1"	Acme Class 2G	Rockwell B75	Not Rated	93023A673	00000
	5/8"-8	Acme	2 1/8"	7/8"	1	1:1	0.125"	Acme Class 2G	Rockwell B75	Not Rated	93023A662	00000
	3/4"-5	Acme	2 1/4"	1"	1	1:1	0.2"	Acme Class 2G	Rockwell B75	Not Rated	93023A664	00000
	3/4"-6	Acme	2 1/4"	1"	1	1:1	0.167"	Acme Class 2G	Rockwell B75	Not Rated	93023A663	00000
	7/8"-6	Acme	2 1/2"	1 1/4"	1	1:1	0.167"	Acme Class 2G	Rockwell B75	Not Rated	93023A665	00000
	1"-5	Acme	2 3/4"	1 3/8"	1	1:1	0.2"	Acme Class 2G	Rockwell B75	Not Rated	93023A667	00000
	1"-6	Acme	2 3/4"	1 3/8"	1	1:1	0.167"	Acme Class 2G	Rockwell B75	Not Rated	93023A666	00000
	1"-10	Acme	2 3/4"	1 3/8"	1	1:1	0.1"	Acme Class 2G	Rockwell B75	Not Rated	93023A680	00000
	1 1/8"-5	Acme	3"	1 1/2"	1	1:1	0.2"	Acme Class 2G	Rockwell B75	Not Rated	93023A668	00000
	1 1/4"-4	Acme	3"	1 5/8"	1	1:1	0.25"	Acme Class 2G	Rockwell B75	Not Rated	93023A671	00000


	1 1/4"-5	Acme	3"	1 5/8"	1	1:1	0.2"	Acme Class 2G	Rockwell B75	Not Rated	93023A669	00000
	1 3/8"-4	Acme	3 1/4"	1 7/8"	1	1:1	0.25"	Acme Class 2G	Rockwell B75	Not Rated	93023A672	00000
	1 1/2"-4	Acme	3 1/2"	2"	1	1:1	0.25"	Acme Class 2G	Rockwell B75	Not Rated	93023A674	00000
	2"-4	Acme	4"	3"	1	1:1	0.25"	Acme Class 2G	Rockwell B75	Not Rated	93023A675	000000
	2 1/2"-4	Acme	5"	3 1/2"	1	1:1	0.25"	Acme Class 2G	Rockwell B75	Not Rated	93023A327	000000


	18-8 Stainless Steel



			1/2"-10	Acme	1 1/4"	5/8"	1	1:1	0.1"	Acme Class 2G	Not Rated	Not Rated	93030A106	00000


			5/8"-8	Acme	2 1/8"	7/8"	1	1:1	0.125"	Acme Class 2G	Not Rated	Not Rated	93030A109	00000
			3/4"-5	Acme	2 1/4"	1"	1	1:1	0.2"	Acme Class 2G	Not Rated	Not Rated	93030A112	00000
			3/4"-6	Acme	2 1/4"	1"	1	1:1	0.167"	Acme Class 2G	Not Rated	Not Rated	93030A113	00000
			7/8"-6	Acme	2 1/2"	1 1/4"	1	1:1	0.167"	Acme Class 2G	Not Rated	Not Rated	93030A115	00000
			1"-5	Acme	2 3/4"	1 3/8"	1	1:1	0.2"	Acme Class 2G	Not Rated	Not Rated	93030A119	00000
			1"-6	Acme	2 3/4"	1 3/8"	1	1:1	0.167"	Acme Class 2G	Not Rated	Not Rated	93030A117	00000
			1"-10	Acme	2 3/4"	1 3/8"	1	1:1	0.1"	Acme Class 2G	Not Rated	Not Rated	93030A118	00000
			1 1/8"-5	Acme	3"	1 1/2"	1	1:1	0.2"	Acme Class 2G	Not Rated	Not Rated	93030A122	000000
			1 1/4"-4	Acme	3"	1 5/8"	1	1:1	0.25"	Acme Class 2G	Not Rated	Not Rated	93030A123	000000
			1 1/4"-5	Acme	3"	1 5/8"	1	1:1	0.2"	Acme Class 2G	Not Rated	Not Rated	93030A124	000000


			1 1/2"-4	Acme	3 1/2"	2"	1	1:1	0.25"	Acme Class 2G	Not Rated	Not Rated	93030A127	000000
			2"-4	Acme	4"	3"	1	1:1	0.25"	Acme Class 2G	Not Rated	Not Rated	93030A129	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



	1/2"-10	Acme	1 1/4"	5/8"	1	1:1	0.1"	Acme Class 2G	Rockwell B75	Not Rated	93026A648	000000


	5/8"-8	Acme	2 1/8"	7/8"	1	1:1	0.125"	Acme Class 2G	Rockwell B75	Not Rated	93026A651	00000
	3/4"-5	Acme	2 1/4"	1"	1	1:1	0.2"	Acme Class 2G	Rockwell B75	Not Rated	93026A653	00000
	3/4"-6	Acme	2 1/4"	1"	1	1:1	0.167"	Acme Class 2G	Rockwell B75	Not Rated	93026A652	00000
	7/8"-6	Acme	2 1/2"	1 1/4"	1	1:1	0.167"	Acme Class 2G	Rockwell B75	Not Rated	93026A304	00000
	1"-5	Acme	2 3/4"	1 3/8"	1	1:1	0.2"	Acme Class 2G	Rockwell B75	Not Rated	93026A655	00000
	1"-6	Acme	2 3/4"	1 3/8"	1	1:1	0.167"	Acme Class 2G	Rockwell B75	Not Rated	93026A654	00000
	1"-10	Acme	2 3/4"	1 3/8"	1	1:1	0.1"	Acme Class 2G	Rockwell B75	Not Rated	93026A308	00000
	1 1/8"-5	Acme	3"	1 1/2"	1	1:1	0.2"	Acme Class 2G	Rockwell B75	Not Rated	93026A656	00000
	1 1/4"-4	Acme	3"	1 5/8"	1	1:1	0.25"	Acme Class 2G	Rockwell B75	Not Rated	93026A658	00000
	1 1/4"-5	Acme	3"	1 5/8"	1	1:1	0.2"	Acme Class 2G	Rockwell B75	Not Rated	93026A657	00000


	1 3/8"-4	Acme	3 1/4"	1 7/8"	1	1:1	0.25"	Acme Class 2G	Rockwell B75	Not Rated	93026A313	00000
	1 1/2"-4	Acme	3 1/2"	2"	1	1:1	0.25"	Acme Class 2G	Rockwell B75	Not Rated	93026A659	000000
	2"-4	Acme	4"	3"	1	1:1	0.25"	Acme Class 2G	Rockwell B75	Not Rated	93026A318	000000