4140 Alloy Steel Screws | McMaster-Carr

Filter by

Material

Steel

12L14 Carbon Steel

1008-1010 Low-Carbon Steel

1018 Low-Carbon Steel

System of Measurement

Thread Size

Length

Component

Thread Direction

Right Hand and Left Hand

Threading

Thread Pitch

Number of Thread Starts

Travel Distance per Turn

Thread Type

Metric Rounded Trapezoidal

Stub Acme

Tensile Strength

30,000 psi to 99,999 psi

100,000 psi or greater

Speed Ratio

Finish

Thread Fit

Hardness

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

REACH

RoHS

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

EAR99

Heat Treatment

Hardened

Usable Left-Hand Thread Length

Performance

End Type

Usable Right-Hand Thread Length

121 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

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.

	Thread Size	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
Black-Oxide 4140 Alloy Steel



		1/4"-16	18"	Acme	1:1	1	0.063"	±0.0003"/1"	Acme Class 2C	Brinell 200	60,000	98940A191	000000


		1/4"-16	3 ft.	Acme	1:1	1	0.063"	±0.0003"/1"	Acme Class 2C	Brinell 200	60,000	98940A192	00000
		1/4"-16	6 ft.	Acme	1:1	1	0.063"	±0.0003"/1"	Acme Class 2C	Brinell 200	60,000	98940A193	000000
		1/4"-20	18"	Acme	1:1	1	0.05"	±0.0003"/1"	Acme Class 2C	Brinell 200	60,000	99030A184	00000
		1/4"-20	3 ft.	Acme	1:1	1	0.05"	±0.0003"/1"	Acme Class 2C	Brinell 200	60,000	99030A185	00000
		1/4"-20	6 ft.	Acme	1:1	1	0.05"	±0.0003"/1"	Acme Class 2C	Brinell 200	60,000	99030A186	000000
		3/8"-8	3 ft.	Stub Acme	1:1	1	0.125"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A605	00000
		3/8"-8	6 ft.	Stub Acme	1:1	1	0.125"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A004	00000
		3/8"-12	18"	Acme	1:1	1	0.083"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A303	00000
		3/8"-12	3 ft.	Acme	1:1	1	0.083"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A615	00000
		3/8"-12	6 ft.	Acme	1:1	1	0.083"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A104	000000


		3/8"-16	3 ft.	Acme	1:1	1	0.063"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A619	00000
		3/8"-16	6 ft.	Acme	1:1	1	0.063"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A016	000000
		1/2"-10	18"	Acme	1:1	1	0.1"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A305	00000
		1/2"-10	3 ft.	Acme	1:1	1	0.1"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A625	00000
		1/2"-10	6 ft.	Acme	1:1	1	0.1"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A106	000000
		5/8"-5	3 ft.	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A634	00000
		5/8"-5	6 ft.	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A108	000000
		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


		5/8"-10	3 ft.	Acme	1:1	1	0.1"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A631	00000
		5/8"-10	6 ft.	Acme	1:1	1	0.1"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A024	000000
		3/4"-5	3 ft.	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A635	00000
		3/4"-5	6 ft.	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A112	000000
		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
		3/4"-8	18"	Acme	1:1	1	0.125"	±0.0003"/1"	Acme Class 2C	Brinell 200	60,000	98940A194	00000
		3/4"-8	3 ft.	Acme	1:1	1	0.125"	±0.0003"/1"	Acme Class 2C	Brinell 200	60,000	98940A195	00000
		3/4"-8	6 ft.	Acme	1:1	1	0.125"	±0.0003"/1"	Acme Class 2C	Brinell 200	60,000	98940A196	000000


		3/4"-10	3 ft.	Acme	1:1	1	0.1"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A639	000000
		3/4"-10	6 ft.	Acme	1:1	1	0.1"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A114	000000
		3/4"-16	18"	Acme	1:1	1	0.063"	±0.0003"/1"	Acme Class 2C	Brinell 200	60,000	98940A197	00000
		3/4"-16	3 ft.	Acme	1:1	1	0.063"	±0.0003"/1"	Acme Class 2C	Brinell 200	60,000	98940A198	00000
		3/4"-16	6 ft.	Acme	1:1	1	0.063"	±0.0003"/1"	Acme Class 2C	Brinell 200	60,000	98940A199	000000
		1"-4	3 ft.	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A641	00000
		1"-4	6 ft.	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A118	000000
		1"-5	18"	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A308	00000
		1"-5	3 ft.	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A643	000000
		1"-5	6 ft.	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A119	000000


		1"-6	3 ft.	Acme	1:1	1	0.167"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A645	000000
		1"-6	6 ft.	Acme	1:1	1	0.167"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A120	000000
		1"-10	3 ft.	Acme	1:1	1	0.1"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A647	000000
		1"-10	6 ft.	Acme	1:1	1	0.1"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A121	000000
		1 1/4"-4	3 ft.	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A649	000000
		1 1/4"-4	6 ft.	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A123	000000
		1 1/4"-5	18"	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A309	00000
		1 1/4"-5	3 ft.	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A651	000000
		1 1/4"-5	6 ft.	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A124	000000
		1 1/2"-4	18"	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A401	00000

1 1/2"-4	3 ft.	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A653	000000
1 1/2"-4	6 ft.	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A127	000000
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
2"-4	18"	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A405	000000
2"-4	3 ft.	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A657	000000
2"-4	6 ft.	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A132	000000

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



	3/8"-12	3	Acme	1:1	1	0.083"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A715	000000


	3/8"-12	6	Acme	1:1	1	0.083"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A404	00000
	3/8"-16	3	Acme	1:1	1	0.063"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A719	00000
	3/8"-16	6	Acme	1:1	1	0.063"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A316	000000
	1/2"-10	3	Acme	1:1	1	0.1"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A725	00000
	1/2"-10	6	Acme	1:1	1	0.1"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A406	00000
	5/8"-5	3	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A734	00000
	5/8"-5	6	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A408	000000
	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
	5/8"-10	3	Acme	1:1	1	0.1"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A731	00000


	5/8"-10	6	Acme	1:1	1	0.1"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A324	000000
	3/4"-5	3	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A735	00000
	3/4"-5	6	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A412	000000
	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
	3/4"-10	3	Acme	1:1	1	0.1"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A739	000000
	3/4"-10	6	Acme	1:1	1	0.1"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A414	000000
	1"-4	3	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A741	000000
	1"-4	6	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A418	000000
	1"-5	3	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A743	000000


	1"-5	6	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A419	000000
	1"-10	3	Acme	1:1	1	0.1"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A747	000000
	1"-10	6	Acme	1:1	1	0.1"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A421	000000
	1 1/4"-4	3	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A749	000000
	1 1/4"-4	6	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A423	000000
	1 1/4"-5	3	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A751	000000
	1 1/4"-5	6	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A424	000000
	1 1/2"-4	3	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A753	000000
	1 1/2"-4	6	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A427	000000
	1 1/2"-5	3	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A755	000000


	1 1/2"-5	6	Acme	1:1	1	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A428	000000
	2"-4	3	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A757	000000
	2"-4	6	Acme	1:1	1	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A432	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



		3/8"-12	3	Acme	1:1	17"	17"	1	0.083"	±0.0003"/1"	Acme Class 2C	Brinell 200	95,000	99015A250	0000000


		1/2"-10	3	Acme	1:1	17"	17"	1	0.1"	±0.0003"/1"	Acme Class 2C	Brinell 200	95,000	99015A260	000000
		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	000000
		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	000000

Metric Fast-Travel Ultra-Precision Lead Screws and Nuts

Image of ProductInUse. Front orientation. Contains Inset. Precision Lead Screws and Nuts. Metric Fast-Travel Ultra-Precision Lead Screws and Nuts.

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 Metric Precision Acme Lead Screws and Nuts, these lead screws and nuts provide increased nut life and more reliable movement in automated systems. To ensure compatibility, select components that have the same thread size and number of thread starts.

Lead Screw—Right-Hand Thread

4140 Alloy Steel—Alloy steel lead screws are hard and strong.

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., mm	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Hardness	Tensile Strength, psi		Each
4140 Alloy Steel



	M5 × 1.25 mm	100	Metric Rounded Trapezoidal	4:1	4	5	±0.089 mm/300 mm	Brinell 200	90,000	97783A150	000000


	M5 × 1.25 mm	175	Metric Rounded Trapezoidal	4:1	4	5	±0.089 mm/300 mm	Brinell 200	125,000	97783A160	00000
	M8 × 2 mm	200	Metric Rounded Trapezoidal	2:1	2	4	±0.089 mm/300 mm	Brinell 200	125,000	97783A170	00000
	M8 × 2 mm	300	Metric Rounded Trapezoidal	2:1	2	4	±0.089 mm/300 mm	Brinell 200	125,000	97783A180	00000

Metric Ultra-Precision Lead Screws and Nuts

Operating with less backlash (play) than Metric Precision Acme Lead Screws and Nuts, these provide increased nut life and more reliable movement in automated systems. 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, select components that have the same thread size, thread type, thread size, thread pitch, and number of thread starts.

Lead Screw—Right-Hand Thread

4140 Alloy Steel—Alloy steel lead screws are hard and strong.

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., mm	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Hardness	Tensile Strength, psi		Each
4140 Alloy Steel



	M8 × 1.5 mm	100	Metric Rounded Trapezoidal	1:1	1	1.5	±0.089 mm/300 mm	Brinell 200	125,000	7549K55	000000


	M8 × 1.5 mm	200	Metric Rounded Trapezoidal	1:1	1	1.5	±0.089 mm/300 mm	Brinell 200	125,000	7549K56	00000
	M8 × 1.5 mm	300	Metric Rounded Trapezoidal	1:1	1	1.5	±0.089 mm/300 mm	Brinell 200	125,000	7549K57	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

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
Black-Oxide 4140 Alloy Steel



	1/4"-12	3	Stub Acme	4:1	4	0.333"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A601	000000


	1/4"-12	6	Stub Acme	4:1	4	0.333"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A101	000000
	3/8"-8	3	Stub Acme	2:1	2	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A609	00000
	3/8"-8	3	Stub Acme	4:1	4	0.5"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A607	00000
	3/8"-8	6	Stub Acme	2:1	2	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A008	000000
	3/8"-8	6	Stub Acme	4:1	4	0.5"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A006	000000
	1/2"-8	3	Acme	2:1	2	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A623	00000
	1/2"-8	6	Acme	2:1	2	0.25"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A105	000000
	1/2"-10	3	Acme	2:1	2	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A629	00000
	1/2"-10	3	Acme	5:1	5	0.5"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A627	00000
	1/2"-10	6	Acme	2:1	2	0.2"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A022	000000


	1/2"-10	6	Acme	5:1	5	0.5"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A020	00000
	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
	1"-10	3	Acme	10:1	10	1"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A602	000000
	1"-10	6	Acme	10:1	10	1"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A102	000000

Lead Screws—Left-Hand Thread

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
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	000000


	3/4"-6	6	Acme	2:1	2	0.333"	±0.009"/1 ft.	Acme Class 2C	Brinell 271	125,000	98940A417	000000