12 ft. Long Lead Screws | McMaster-Carr

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Thread Type

Thread Direction

Threading

Travel Distance per Turn

Thread Fit

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ASTM Grade B7

SAE Grade 2

Tensile Strength

40,000 psi to 99,999 psi

100,000 psi or greater

Not Rated

Number of Thread Starts

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33 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.

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., 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



	3/8"-12	Acme	12	1	1:1	0.083"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A622	000000


	1/2"-10	Acme	12	1	1:1	0.1"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A632	00000
	5/8"-8	Acme	12	1	1:1	0.125"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A642	00000
	3/4"-5	Acme	12	1	1:1	0.2"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A652	00000
	3/4"-6	Acme	12	1	1:1	0.167"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A653	00000
	7/8"-6	Acme	12	1	1:1	0.167"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A662	00000
	1"-5	Acme	12	1	1:1	0.2"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A672	00000
	1"-6	Acme	12	1	1:1	0.167"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A673	000000
	1"-10	Acme	12	1	1:1	0.1"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A676	000000
	1 1/4"-4	Acme	12	1	1:1	0.25"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A682	000000
	1 1/4"-5	Acme	12	1	1:1	0.2"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A683	000000


	1 1/2"-4	Acme	12	1	1:1	0.25"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A692	000000


	Alloy Steel



			3/8"-12	Acme	12	1	1:1	0.083"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A825	000000


			1/2"-10	Acme	12	1	1:1	0.1"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A840	000000
			5/8"-8	Acme	12	1	1:1	0.125"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A845	000000
			3/4"-5	Acme	12	1	1:1	0.2"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A850	000000
			3/4"-6	Acme	12	1	1:1	0.167"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A851	000000
			1"-5	Acme	12	1	1:1	0.2"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A861	000000
			1"-6	Acme	12	1	1:1	0.167"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A862	000000
			1"-10	Acme	12	1	1:1	0.1"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A863	000000
			1 1/4"-4	Acme	12	1	1:1	0.25"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A871	000000
			1 1/4"-5	Acme	12	1	1:1	0.2"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A872	000000
			1 1/2"-4	Acme	12	1	1:1	0.25"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A877	000000


			18-8 Stainless Steel



					3/8"-12	Acme	12	1	1:1	0.083"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A923	000000


					1/2"-10	Acme	12	1	1:1	0.1"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A929	000000
					5/8"-8	Acme	12	1	1:1	0.125"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A935	000000
					3/4"-5	Acme	12	1	1:1	0.2"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A941	000000
					3/4"-6	Acme	12	1	1:1	0.167"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A942	000000
					7/8"-6	Acme	12	1	1:1	0.167"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A947	000000
					1"-5	Acme	12	1	1:1	0.2"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A953	000000
					1"-6	Acme	12	1	1:1	0.167"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A954	000000
					1"-10	Acme	12	1	1:1	0.1"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A957	000000
					1 1/4"-5	Acme	12	1	1:1	0.2"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A972	000000