1/4"-16 Lead Screws | McMaster-Carr

Filter by

Component

System of Measurement

Length

Nut Type

Thread Direction

Material

Thread Type

Threading

Travel Distance per Turn

Diameter

Number of Thread Starts

Thread Fit

Shaft Type

Tensile Strength

40,000 psi to 99,999 psi

100,000 psi or greater

Speed Ratio

Export Control Classification Number (ECCN)

EAR99

Fastener Strength Grade/Class

Thread Length

Hardness

Height

Dynamic Thrust Load Capacity

Less than 1,000 lb.

Not Rated

DFARS Specialty Metals

Compliant

Exempt

Not Compliant

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

REACH

RoHS

Compliant with Exemptions

Not Compliant

Forward

How can we improve?

Help me decide (beta)

89 Products

About Carriages and Guide Rails

Stabilize your carriages against pitch, roll, and yaw forces by installing them in pairs.

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.

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	Specs. Met		Each
Carbon Steel



	1/4"-16	Acme	12"	1	1:1	0.063"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000 psi	ASTM A108	98935A703	00000


	1/4"-16	Acme	3 ft.	1	1:1	0.063"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000 psi	ASTM A108	98935A803	00000
	1/4"-16	Acme	6 ft.	1	1:1	0.063"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000 psi	ASTM A108	98935A205	00000


	Alloy Steel



			1/4"-16	Acme	6"	1	1:1	0.063"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000 psi	ASTM A193	93420A881	00000


			1/4"-16	Acme	12"	1	1:1	0.063"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000 psi	ASTM A193	93410A904	00000
			1/4"-16	Acme	3 ft.	1	1:1	0.063"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000 psi	ASTM A193	93410A606	00000
			1/4"-16	Acme	6 ft.	1	1:1	0.063"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000 psi	ASTM A193	93410A305	00000


			18-8 Stainless Steel



					1/4"-16	Acme	12"	1	1:1	0.063"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A601	00000


					1/4"-16	Acme	3 ft.	1	1:1	0.063"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A801	00000
					1/4"-16	Acme	6 ft.	1	1:1	0.063"	Acme Class 2G	—	Rockwell B96	Not Rated	—	95061A505	00000


					316 Stainless Steel



							1/4"-16	Acme	12"	1	1:1	0.063"	Acme Class 2G	ASTM Grade B8M	Rockwell B97	75,000 psi	ASTM A193	97014A631	00000


							1/4"-16	Acme	3 ft.	1	1:1	0.063"	Acme Class 2G	ASTM Grade B8M	Rockwell B97	75,000 psi	ASTM A193	97014A632	00000
							1/4"-16	Acme	6 ft.	1	1:1	0.063"	Acme Class 2G	ASTM Grade B8M	Rockwell B97	75,000 psi	ASTM A193	97014A633	00000

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



	1/4"-16	Acme	3	1	1:1	0.063"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A404	000000


	1/4"-16	Acme	6	1	1:1	0.063"	Acme Class 2G	SAE Grade 2	Rockwell B61	64,000	ASTM A108	98935A405	00000


	Alloy Steel



			1/4"-16	Acme	3	1	1:1	0.063"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A404	00000


			1/4"-16	Acme	6	1	1:1	0.063"	Acme Class 2G	ASTM Grade B7	Rockwell C35	125,000	ASTM A193	93410A405	00000

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



		1/4"-16	Acme	3"	1	1:1	0.063"	2 1/2" to 3"	7/16"	5/32"	Acme Class 2G	SAE Grade 5	Rockwell C19	105,000	93097A110	000000


		1/4"-16	Acme	4"	1	1:1	0.063"	3" to 4"	7/16"	5/32"	Acme Class 2G	SAE Grade 5	Rockwell C19	105,000	93097A120	00000
		1/4"-16	Acme	6"	1	1:1	0.063"	4" to 6"	7/16"	5/32"	Acme Class 2G	SAE Grade 5	Rockwell C19	105,000	93097A130	00000

Round Nuts—Right-Hand Thread

Round nuts move objects along the length of a lead screw.

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
932 Bearing Bronze



	1/4"-16	Acme	17/32"	25/32"	1	1:1	0.063"	Acme Class 2G	Not Rated	Not Rated	ASTM B505	95090A501	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



	1/4"-16	Acme	15/64"	1/2"	1	1:1	0.063"	Acme Class 2G	Rockwell B75	Not Rated	94815A007	00000


	Zinc-Plated Carbon Steel



			1/4"-16	Acme	15/64"	1/2"	1	1:1	0.063"	Acme Class 2G	Rockwell B75	Not Rated	98948A111	00000


			18-8 Stainless Steel



					1/4"-16	Acme	15/64"	1/2"	1	1:1	0.063"	Acme Class 2G	Rockwell B97	Not Rated	95066A105	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.

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		Each
Carbon Steel



	1/4"-16	Acme	15/64"	1/2"	1	1:1	0.063"	Acme Class 2G	SAE Grade 2	Rockwell B85	64,000 psi	91808A009	00000


	18-8 Stainless Steel



			1/4"-16	Acme	15/64"	1/2"	1	1:1	0.063"	Acme Class 2G	—	Rockwell B97	Not Rated	95066A305	00000

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		Each
1018 Low-Carbon Steel



	1/4"-16	18"	Acme	1:1	1	0.063"	±0.009"/1 ft.	Acme Class 2C	Not Rated	Not Rated	99030A981	000000


	1/4"-16	3 ft.	Acme	1:1	1	0.063"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000 psi	99030A032	00000
	1/4"-16	6 ft.	Acme	1:1	1	0.063"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000 psi	99030A132	00000


	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 psi	98940A191	00000


			1/4"-16	3 ft.	Acme	1:1	1	0.063"	±0.0003"/1"	Acme Class 2C	Brinell 200	60,000 psi	98940A192	00000
			1/4"-16	6 ft.	Acme	1:1	1	0.063"	±0.0003"/1"	Acme Class 2C	Brinell 200	60,000 psi	98940A193	000000


			304 Stainless Steel



					1/4"-16	18"	Acme	1:1	1	0.063"	±0.009"/1 ft.	Acme Class 2C	Not Rated	Not Rated	98980A965	00000


					1/4"-16	3 ft.	Acme	1:1	1	0.063"	±0.009"/1 ft.	Acme Class 2C	Not Rated	Not Rated	98980A966	00000
					1/4"-16	6 ft.	Acme	1:1	1	0.063"	±0.009"/1 ft.	Acme Class 2C	Brinell 150	72,000 psi	98980A209	000000

Lead Screws—Left-Hand Thread


	Left-Hand Threads

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



	1/4"-16	3	Acme	1:1	1	0.063"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A432	000000


	1/4"-16	6	Acme	1:1	1	0.063"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	99030A532	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.	Temp., ° F		Each
673 Bronze



		1/4"-16	5/8"	0.688"	Acme	1:1	1	0.063"	9/16"-18	3/8"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	—	95072A881	000000


		PET



				1/4"-16	5/8"	0.688"	Acme	1:1	1	0.063"	9/16"-18	3/8"	Acme Class 2C	Not Rated	Not Rated	160 lb.	15 to 175	95075A210	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



		1/4"-16	5/8"	0.688"	Acme	1:1	1	0.063"	9/16"-18	3/8"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	95072A882	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



	9/16"-18	1 39/64"	13/32"	1 1/8"	Brinell 135	1329K101	000000


	1215 Carbon Steel



			9/16"-18	1 39/64"	13/32"	1 1/8"	Not Rated	95082A641	00000


			303 Stainless Steel



					9/16"-18	1 39/64"	13/32"	1 1/8"	Brinell 140	1329K11	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.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength		Each
1018 Low-Carbon Steel



	1/4"-16	18"	Acme	4:1	4	0.25"	±0.009"/1 ft.	Acme Class 2C	Not Rated	Not Rated	99030A982	000000


	1/4"-16	3 ft.	Acme	4:1	4	0.25"	±0.009"/1 ft.	Acme Class 2C	Not Rated	Not Rated	99030A983	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



		1/4"-16	5/8"	0.688"	Acme	4:1	4	0.25"	9/16"-18	3/8"	Acme Class 2C	Brinell 130	Not Rated	300	95072A430	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



	9/16"-18	1 39/64"	13/32"	1 1/8"	Not Rated	95082A641	000000


	303 Stainless Steel



			9/16"-18	1 39/64"	13/32"	1 1/8"	Brinell 140	1329K11	00000

Stepper Motors with Linear Actuation

Instead of a shaft, these stepper motors have a lead screw that converts rotational motion to linear motion. Moving in increments smaller than the thickness of a sheet of paper, they're ideal for applications that require fine motion control, such as positioning electrical components on a circuit board. They move in equal steps and hold their position when stationary, so they do not require encoders, sensors, or other position feedback devices. The lead screw is built into the motor, so there are fewer points of failure than systems that use a shaft coupling to connect the lead screw. All are bipolar hybrid stepper motors, which deliver greater torque, precision, and efficiency than other types of stepper motors.

All motors require a controller and drive (not included).

For the Manufacturer User Manual, click on a part number and select Product Detail.

External Lead Screw—External lead screw stepper motors work similar to a traditional linear motion system; attach the load to the flanged nut, which travels back and forth along the lead screw.

Pass-Through Lead Screw—Pass-through lead screw stepper motors give you the most design versatility because there are two ways to move your load: on the motor body or on the ends of the lead screw. The motor moves when the lead screw is fixed or the lead screw moves when the motor body is fixed.

Travel Distance per Full Step—Travel distance per full step determines the control you have over the motor’s positioning. The smaller the measurement, the finer positioning control you have, but the more steps it will take to go the same distance.

Dynamic Load Capacity—Dynamic load capacity is the maximum load a motor can move. If you increase the speed, the dynamic load capacity decreases. Click on a part number and select "Product Detail" to view the load-speed chart and confirm the motor will work for your application.

Full Step Increment—Full step increment is the rotation of the shaft from one position to the next. A smaller full step increment means the rotor has more teeth, producing smoother and more precise motion. 1.8° is considered standard.

									Overall					Temp. Range, ° F
	Travel Distance per Full Step	Travel Lg.	Dynamic Load Cap., lb.	Max. Speed, in/sec	Max. Current per Phase, amp	Full Step Increment	Stepper Motor Polarity	No. of Wire Leads	Lg.	Wd.	Ht.	Lead Screw Lg.	Thread Size	Min.	Max.		Each
External Lead Screw







				NEMA 14 Frame Size

				0.00125"	3.2"	28	2	2	1.8°	Bipolar	4	5.7"	1.4"	1.4"	4"	1/4"-16	35	130	8677N48	0000000


				0.00125"	5.2"	16	1.7	1.2	1.8°	Bipolar	4	7.4"	1.4"	1.4"	6"	1/4"-16	35	130	8677N49	000000
				0.00125"	7.2"	28	2	2	1.8°	Bipolar	4	9.7"	1.4"	1.4"	8"	1/4"-16	35	130	8677N51	000000
				0.00125"	11.2"	16	1.7	1.2	1.8°	Bipolar	4	13.4"	1.4"	1.4"	12"	1/4"-16	35	130	8677N52	000000




						NEMA 17 Frame Size

						0.0003125"	5.2"	50	0.4	1.5	1.8°	Bipolar	4	7.3"	1.7"	1.7"	6"	1/4"-16	35	130	8677N53	000000


						0.0003125"	11.2"	50	0.4	1.5	1.8°	Bipolar	4	13.3"	1.7"	1.7"	12"	1/4"-16	35	130	8677N54	000000
						0.000625"	5.2"	50	1.2	1.5	1.8°	Bipolar	4	7.3"	1.7"	1.7"	6"	1/4"-16	35	130	8677N17	000000
						0.000625"	5.2"	75	1.1	2.6	1.8°	Bipolar	4	7.9"	1.7"	1.7"	6"	1/4"-16	35	130	8677N22	000000
						0.000625"	11.2"	50	1.2	1.5	1.8°	Bipolar	4	13.3"	1.7"	1.7"	12"	1/4"-16	35	130	8677N18	000000
						0.000625"	11.2"	75	1.1	2.6	1.8°	Bipolar	4	13.9"	1.7"	1.7"	12"	1/4"-16	35	130	8677N23	000000
						0.00125"	5.2"	25	2	1.5	1.8°	Bipolar	4	7.3"	1.7"	1.7"	6"	1/4"-16	35	130	8677N19	000000
						0.00125"	5.2"	60	2.1	2.6	1.8°	Bipolar	4	7.9"	1.7"	1.7"	6"	1/4"-16	35	130	8677N24	000000
						0.00125"	11.2"	25	2	1.5	1.8°	Bipolar	4	13.3"	1.7"	1.7"	12"	1/4"-16	35	130	8677N21	000000
						0.00125"	11.2"	60	2.1	2.6	1.8°	Bipolar	4	13.9"	1.7"	1.7"	12"	1/4"-16	35	130	8677N25	000000
						0.0025"	6.2"	28	3.9	2.6	1.8°	Bipolar	4	7.9"	1.7"	1.7"	6"	1/4"-16	35	130	8677N55	000000


						0.0025"	11.2"	28	3.9	2.6	1.8°	Bipolar	4	13.9"	1.7"	1.7"	12"	1/4"-16	35	130	8677N56	000000


						Pass-Through Lead Screw







										NEMA 14 Frame Size

										0.00125"	4.5"	16	1.7	1.2	1.8°	Bipolar	4	6.3"	1.4"	1.4"	6"	1/4"-16	35	130	8677N77	000000


										0.00125"	10.5"	16	1.7	1.2	1.8°	Bipolar	4	12.3"	1.4"	1.4"	12"	1/4"-16	35	130	8677N78	000000




												NEMA 17 Frame Size

												0.0003125"	4.6"	50	0.4	1.5	1.8°	Bipolar	4	6.3"	1.7"	1.7"	6"	1/4"-16	35	130	8677N79	000000


												0.0003125"	10.5"	50	0.4	1.5	1.8°	Bipolar	4	12.3"	1.7"	1.7"	12"	1/4"-16	35	130	8677N81	000000
												0.000625"	4"	75	0.9	2.6	1.8°	Bipolar	4	6.3"	1.7"	1.7"	6"	1/4"-16	35	130	8677N83	000000
0.000625"												4.6"	50	0.8	1.5	1.8°	Bipolar	4	6.3"	1.7"	1.7"	6"	1/4"-16	35	130	8677N82	000000
0.000625"	10.1"											75	1.1	2.6	1.8°	Bipolar	4	12.3"	1.7"	1.7"	12"	1/4"-16	35	130	8677N32	000000
0.000625"	10.6"											50	1.2	1.5	1.8°	Bipolar	4	12.3"	1.7"	1.7"	12"	1/4"-16	35	130	8677N29	000000
0.000625"	16"											75	0.9	2.6	1.8°	Bipolar	4	18.3"	1.7"	1.7"	18"	1/4"-16	35	130	8677N85	000000
0.000625"	16.6"											50	0.8	1.5	1.8°	Bipolar	4	18.3"	1.7"	1.7"	18"	1/4"-16	35	130	8677N84	000000
0.00125"	4"	61										1.9	2.6	1.8°	Bipolar	4	6.3"	1.7"	1.7"	6"	1/4"-16	35	130	8677N87	000000
0.00125"	4.6"	24	1.9									1.5	1.8°	Bipolar	4	6.3"	1.7"	1.7"	6"	1/4"-16	35	130	8677N86	000000
0.00125"	10.1"	60	2.1									2.6	1.8°	Bipolar	4	12.3"	1.7"	1.7"	12"	1/4"-16	35	130	8677N33	000000


0.00125"	10.6"	25	2									1.5	1.8°	Bipolar	4	12.3"	1.7"	1.7"	12"	1/4"-16	35	130	8677N31	000000
0.00125"	16"	61	1.9									2.6	1.8°	Bipolar	4	18.3"	1.7"	1.7"	18"	1/4"-16	35	130	8677N89	000000
0.00125"	16.6"	24	1.9									1.5	1.8°	Bipolar	4	18.3"	1.7"	1.7"	18"	1/4"-16	35	130	8677N88	000000
0.0025"	4"	28	3.9									2.6	1.8°	Bipolar	4	6.3"	1.7"	1.7"	6"	1/4"-16	35	130	8677N91	000000
0.0025"	10"	28	3.9									2.6	1.8°	Bipolar	4	12.3"	1.7"	1.7"	12"	1/4"-16	35	130	8677N92	000000

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



	1/4"-16	3	Rounded Acme	4:1	4	0.25"	±0.0006"/1"	Brinell 160	90,000	6350K699	0000000


	1/4"-16	6	Rounded Acme	4:1	4	0.25"	±0.0006"/1"	Brinell 160	90,000	6350K11	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	1/4"-16	1"	0.5"	1"	3/16"	Rounded Acme	4:1	3/4"	4	0.25"	Not Rated	9,700	50	3	6350K31	000000


		Acetal with Wear-Compensating Spring



				C	1/4"-16	1"	0.5"	1"	3/16"	Rounded Acme	4:1	3/4"	4	0.25"	Not Rated	9,700	5	3	6350K51	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 1215 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 1215 Carbon Steel

	1/4"-16	5/8"	9/32"	1	Brinell 167	6698K51	000000




			303 Stainless Steel

			1/4"-16	5/8"	9/32"	1	Brinell 228	2228N21	00000

Multi-Axis Stepper Motor Electric Actuators

Precisely drive both linear and rotary motion from one compact system. Often found in pick-and-place equipment, these actuators have two stepper motors. Each stepper motor drives one type of motion, and you can control them separately. When stopped, they hold their position even when a counteracting force is applied to the load.

To confirm which actuator will work for your application, click on a part number and select Product Detail to view the torque-speed curve and dynamic load-speed chart. Holding torque is the force needed to move the actuator out of position when it’s stationary. When the actuator is rotating, torque generally decreases as speed increases. Dynamic load capacity is the maximum load an actuator can move linearly. If you increase the speed, the dynamic load capacity decreases.

Travel distance per full step determines the control you have over the actuator's linear positioning. The smaller the measurement, the finer positioning control you have, but the more steps it will take to go the same distance.

All actuators require a controller and two motor drivers (not included).

For the Manufacturer User Manual, click on a part number and select Product Detail.

Electric Actuators with Encoder—Actuators with an encoder are useful in applications where relative positioning is critical, such as coordinating motion between multiple actuators. The encoder monitors the position of the actuator and reports back to a controller (not included), which adjusts or stops the shaft if it isn’t in the right place.

Full Step Increment—Full step increment refers to how much the actuator rotates when it takes a full step. A smaller full step increment means the rotor has more teeth, producing smoother and more precise motion. 1.8° is considered standard.

				Rotary			Linear				Overall
	Max. Holding Torque, in·ozf	Travel Distance per Full Step	Travel Lg.	Rotational Load Cap., in·ozf	Max. Rotation Speed, rpm	Max. Current per Phase, amp	Dynamic Load Cap., lb.	Max. Speed, in/sec	Max. Current per Phase, amp	Full Step Increment	Lg.	Wd.	Ht.		Each
Electric Actuators



		118	0.00125"	6"	48	900	2	5	2	1.5	1.8°	11 1/2"	2.7"	2.2"	8685N11	000000000


		Electric Actuators with Encoder



				118	0.00125"	6"	48	900	2	5	2	1.5	1.8°	11 1/2"	2.7"	2.2"	8685N12	00000000

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 1215 Carbon Steel—Black-oxide carbon steel collars have mild corrosion resistance.

	No. of Thread Starts	Hardness		Each
Right-Hand Thread







	Black-Oxide 1215 Carbon Steel

	1/4"-16	5/8"	9/32"	1	Brinell 167	2207N11	000000