Left-Hand Threaded Precision Acme Rods

	Thread Direction Thread Direction

	Left Hand
	Right Hand and Left Hand

	Thread Size Thread Size

	Component Component

	Lead Screw
	Nut

	Material Material

	Length Length

	Nut Type Nut Type


Round	Platform

Externally Threaded

	Number of Thread Starts Number of Thread Starts

	Travel Distance per Turn Travel Distance per Turn

	Speed Ratio Speed Ratio

	Hardness Hardness

	Tensile Strength Tensile Strength

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Dynamic Thrust Load Capacity Dynamic Thrust Load Capacity

10,000 lbs. or greater

Not Rated

	Diameter Diameter

	Height Height

	Width Width

2 5/8"

3 5/8"

	External Thread Size External Thread Size

	External Thread Type External Thread Type

UNS

UNF

	External Thread Length External Thread Length

	Center Height Center Height

	Usable Left-Hand Thread Length Usable Left-Hand Thread Length

233 Products

Selecting Compatible 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 and size.

Carbon steel lead screws and flanges have good machinability. Black-oxide alloy steel lead screws are hard and strong. They have mild corrosion resistance. 303 and 304 stainless steel lead screws and flanges have good corrosion resistance.

Cast iron nuts have good machinability and high strength. 360 brass nuts have excellent machinability and good corrosion resistance. 932 bearing bronze and 673 bronze nuts are wear resistant. They have good machinability and fair corrosion resistance. PET plastic nuts are lightweight and corrosion resistant.

Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

For technical drawings and 3-D models, click on a part number.

Lead Screws—Left-Hand Threaded

Left-Hand Threads

1018 Carbon Steel
Thread Size	Lg., ft.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength, psi		Each
1/4"-16	3	1	1:1	0.063"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1/4"-16	6	1	1:1	0.063"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/8"-10	3	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/8"-10	6	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/8"-16	3	1	1:1	0.063"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/8"-16	6	1	1:1	0.063"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1/2"-10	3	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1/2"-10	6	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
5/8"-8	3	1	1:1	0.125"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
5/8"-8	6	1	1:1	0.125"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
5/8"-10	3	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
5/8"-10	6	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/4"-5	3	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/4"-5	6	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
3/4"-6	3	1	1:1	0.167"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/4"-6	6	1	1:1	0.167"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
3/4"-8	3	1	1:1	0.125"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/4"-8	6	1	1:1	0.125"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/4"-10	3	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/4"-10	6	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
3/4"-16	3	1	1:1	0.063"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/4"-16	6	1	1:1	0.063"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1"-4	3	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1"-4	6	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1"-5	3	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1"-5	6	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1"-6	3	1	1:1	0.167"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1"-6	6	1	1:1	0.167"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1"-8	3	1	1:1	0.125"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1"-8	6	1	1:1	0.125"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1"-10	3	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1"-10	6	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1 1/4"-4	3	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1 1/4"-4	6	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1 1/4"-5	3	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1 1/4"-5	6	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1 1/2"-4	3	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1 1/2"-4	6	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1 1/2"-10	3	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1 1/2"-10	6	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
2"-4	3	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
2"-4	6	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
Black-Oxide 4140 Alloy Steel
3/8"-12	3	1	1:1	0.083"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	00000
3/8"-12	6	1	1:1	0.083"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	00000
3/8"-16	3	1	1:1	0.063"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	00000
3/8"-16	6	1	1:1	0.063"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	00000
1/2"-10	3	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	00000
1/2"-10	6	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	00000
5/8"-5	3	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	00000
5/8"-5	6	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
5/8"-8	3	1	1:1	0.125"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	00000
5/8"-8	6	1	1:1	0.125"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
5/8"-10	3	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	00000
5/8"-10	6	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
3/4"-5	3	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	00000
3/4"-5	6	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
3/4"-6	3	1	1:1	0.167"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	00000
3/4"-6	6	1	1:1	0.167"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
3/4"-10	3	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
3/4"-10	6	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
1"-4	3	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
1"-4	6	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
1"-5	3	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
1"-5	6	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
1"-10	3	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
1"-10	6	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
1 1/4"-4	3	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
1 1/4"-4	6	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
1 1/4"-5	3	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
1 1/4"-5	6	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
1 1/2"-4	3	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
1 1/2"-4	6	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
1 1/2"-5	3	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
1 1/2"-5	6	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
2"-4	3	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
2"-4	6	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
304 Stainless Steel
3/8"-8	3	1	1:1	0.125"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
3/8"-8	6	1	1:1	0.125"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
3/8"-10	3	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
3/8"-10	6	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
3/8"-12	3	1	1:1	0.083"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
3/8"-12	6	1	1:1	0.083"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
3/8"-16	3	1	1:1	0.063"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
3/8"-16	6	1	1:1	0.063"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
1/2"-10	3	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
1/2"-10	6	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
5/8"-8	3	1	1:1	0.125"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
5/8"-8	6	1	1:1	0.125"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
5/8"-10	3	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
5/8"-10	6	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
3/4"-5	3	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
3/4"-5	6	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
3/4"-6	3	1	1:1	0.167"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
3/4"-6	6	1	1:1	0.167"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
3/4"-10	3	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
3/4"-10	6	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
1"-4	3	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
1"-4	6	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
1"-5	3	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
1"-5	6	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
1"-6	3	1	1:1	0.167"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
1"-6	6	1	1:1	0.167"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
1"-10	3	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
1"-10	6	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
1 1/4"-5	3	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
1 1/4"-5	6	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
1 1/2"-4	3	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
1 1/2"-4	6	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000

Lead Screws—Right-Hand-and-Left-Hand Threaded

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.

		Usable Thread Lg.
Thread Size	Lg., ft.	Right Hand	Left Hand	No. of Thread Starts	Speed Ratio	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	17"	17"	1	1:1	0.083"	±0.0003" per in.	Class 2C	Brinell 200	95,000	000000000	0000000
1/2"-10	3	17"	17"	1	1:1	0.1"	±0.0003" per in.	Class 2C	Brinell 200	95,000	000000000	000000
5/8"-8	3	16 1/2"	16 1/2"	1	1:1	0.125"	±0.0003" per in.	Class 2C	Brinell 200	95,000	000000000	000000
3/4"-6	3	16 1/2"	16 1/2"	1	1:1	0.167"	±0.0003" per in.	Class 2C	Brinell 200	95,000	000000000	000000

Platform Nuts—Left-Hand Threaded

Platform nuts have wide, machinable surfaces for custom mounting.

932 Bearing Bronze
Thread Size	Lg.	Wd.	Ht.	Center Ht.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Hardness	Dynamic Thrust Load Cap., lbs.		Each
1/2"-10	1 3/4"	2"	1 1/8"	5/8"	1	1:1	0.1"	Class 2C	Brinell 65	1,200	0000000	0000000
3/4"-5	2 1/4"	2 5/8"	1 5/8"	15/16"	1	1:1	0.2"	Class 2C	Brinell 65	2,800	0000000	000000
3/4"-6	2 1/4"	2 5/8"	1 5/8"	15/16"	1	1:1	0.167"	Class 2C	Brinell 65	2,800	0000000	000000
3/4"-10	2 1/4"	2 5/8"	1 5/8"	15/16"	1	1:1	0.1"	Class 2C	Brinell 65	2,800	0000000	000000
1"-4	3"	3"	1 15/16"	1 1/8"	1	1:1	0.25"	Class 2C	Brinell 65	5,000	0000000	000000
1"-5	3"	3"	1 15/16"	1 1/8"	1	1:1	0.2"	Class 2C	Brinell 65	5,000	0000000	000000
1"-6	3"	3"	1 15/16"	1 1/8"	1	1:1	0.167"	Class 2C	Brinell 65	5,000	0000000	000000
1"-10	3"	3"	1 15/16"	1 1/8"	1	1:1	0.1"	Class 2C	Brinell 65	5,000	0000000	000000
1 1/2"-4	4 1/2"	3 5/8"	2 9/16"	1 1/2"	1	1:1	0.25"	Class 2C	Brinell 65	11,000	0000000	000000

Round Nuts—Left-Hand Threaded

Cast Iron
Thread Size	Lg.	Dia.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Hardness	Dynamic Thrust Load Cap., lbs.	Temperature Range, °F		Each
3/8"-8	3/4"	1.344"	1	1:1	0.125"	Class 2C	Brinell 217	Not Rated	__	000000000	000000
3/8"-10	3/4"	1.344"	1	1:1	0.1"	Class 2C	Brinell 217	Not Rated	__	000000000	00000
3/8"-12	3/4"	1.344"	1	1:1	0.083"	Class 2C	Brinell 217	Not Rated	__	000000000	00000
3/8"-16	3/4"	1.344"	1	1:1	0.063"	Class 2C	Brinell 217	Not Rated	__	000000000	00000
1/2"-10	1"	1.469"	1	1:1	0.1"	Class 2C	Brinell 217	Not Rated	__	000000000	00000
5/8"-5	1 1/4"	1.859"	1	1:1	0.2"	Class 2C	Brinell 217	Not Rated	__	000000000	00000
5/8"-8	1 1/4"	1.859"	1	1:1	0.125"	Class 2C	Brinell 217	Not Rated	__	000000000	00000
5/8"-10	1 1/4"	1.859"	1	1:1	0.1"	Class 2C	Brinell 217	Not Rated	__	000000000	00000
3/4"-5	1 1/2"	2.234"	1	1:1	0.2"	Class 2C	Brinell 217	Not Rated	__	000000000	00000
3/4"-6	1 1/2"	2.234"	1	1:1	0.167"	Class 2C	Brinell 217	Not Rated	__	000000000	00000
3/4"-10	1 1/2"	2.234"	1	1:1	0.1"	Class 2C	Brinell 217	Not Rated	__	000000000	00000
1"-4	2"	2.984"	1	1:1	0.25"	Class 2C	Brinell 217	Not Rated	__	000000000	00000
1"-5	2"	2.984"	1	1:1	0.2"	Class 2C	Brinell 217	Not Rated	__	000000000	00000
1"-6	2"	2.984"	1	1:1	0.167"	Class 2C	Brinell 217	Not Rated	__	000000000	00000
1"-10	2"	2.984"	1	1:1	0.1"	Class 2C	Brinell 217	Not Rated	__	000000000	00000
1 1/4"-4	2 1/2"	3.734"	1	1:1	0.25"	Class 2C	Brinell 217	Not Rated	__	000000000	000000
1 1/4"-5	2 1/2"	3.734"	1	1:1	0.2"	Class 2C	Brinell 217	Not Rated	__	000000000	000000
1 1/2"-4	3"	4.469"	1	1:1	0.25"	Class 2C	Brinell 217	Not Rated	__	000000000	000000
932 Bearing Bronze
3/8"-8	3/4"	1.344"	1	1:1	0.125"	Class 2C	Brinell 65	700	__	00000000	00000
3/8"-10	3/4"	1.344"	1	1:1	0.1"	Class 2C	Brinell 65	700	__	00000000	00000
3/8"-12	3/4"	1.344"	1	1:1	0.083"	Class 2C	Brinell 65	700	__	00000000	00000
1/2"-10	1"	1.469"	1	1:1	0.1"	Class 2C	Brinell 65	1,300	__	00000000	00000
5/8"-8	1 1/4"	1.859"	1	1:1	0.125"	Class 2C	Brinell 65	2,000	__	00000000	00000
5/8"-10	1 1/4"	1.859"	1	1:1	0.1"	Class 2C	Brinell 65	2,000	__	00000000	00000
3/4"-5	1 1/2"	2.234"	1	1:1	0.2"	Class 2C	Brinell 65	2,900	__	00000000	000000
3/4"-6	1 1/2"	2.234"	1	1:1	0.167"	Class 2C	Brinell 65	2,900	__	00000000	000000
3/4"-10	1 1/2"	2.234"	1	1:1	0.1"	Class 2C	Brinell 65	2,900	__	00000000	000000
1"-4	2"	2.984"	1	1:1	0.25"	Class 2C	Brinell 65	5,000	__	00000000	000000
1"-5	2"	2.984"	1	1:1	0.2"	Class 2C	Brinell 65	5,000	__	00000000	000000
1"-6	2"	2.984"	1	1:1	0.167"	Class 2C	Brinell 65	5,000	__	00000000	000000
1"-10	2"	2.984"	1	1:1	0.1"	Class 2C	Brinell 65	5,000	__	00000000	000000
1 1/4"-4	2 1/2"	3.734"	1	1:1	0.25"	Class 2C	Brinell 65	7,850	__	00000000	000000
1 1/4"-5	2 1/2"	3.734"	1	1:1	0.2"	Class 2C	Brinell 65	7,850	__	00000000	000000
1 1/2"-4	3"	4.469"	1	1:1	0.25"	Class 2C	Brinell 65	12,000	__	00000000	000000
PET Plastic
3/8"-8	3/4"	1.344"	1	1:1	0.125"	Class 2C	Not Rated	350	15° to 175°	00000000	00000
3/8"-10	3/4"	1.344"	1	1:1	0.1"	Class 2C	Not Rated	350	15° to 175°	00000000	00000
3/8"-12	3/4"	1.344"	1	1:1	0.083"	Class 2C	Not Rated	350	15° to 175°	00000000	00000
1/2"-10	1"	1.469"	1	1:1	0.1"	Class 2C	Not Rated	650	15° to 175°	00000000	00000
5/8"-8	1 1/4"	1.859"	1	1:1	0.125"	Class 2C	Not Rated	1,000	15° to 175°	00000000	00000
5/8"-10	1 1/4"	1.859"	1	1:1	0.1"	Class 2C	Not Rated	1,000	15° to 175°	00000000	00000
3/4"-5	1 1/2"	2.234"	1	1:1	0.2"	Class 2C	Not Rated	1,450	15° to 175°	00000000	000000
3/4"-6	1 1/2"	2.234"	1	1:1	0.167"	Class 2C	Not Rated	1,450	15° to 175°	00000000	000000
3/4"-10	1 1/2"	2.234"	1	1:1	0.1"	Class 2C	Not Rated	1,450	15° to 175°	00000000	000000

Externally Threaded Nuts—Left-Hand Threaded

Combine externally threaded nuts with a flange to create a custom flange nut.

						External Thread
Thread Size	Lg.	Dia.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Size	Lg.	Thread Fit	Hardness	Dynamic Thrust Load Cap., lbs.		Each
360 Brass
3/4"-8	1 1/4"	1.125"	1	1:1	0.125"	1"-18	1/2"	Class 2C	Brinell 70	2,800	000000000	000000
3/4"-16	1 1/4"	1.125"	1	1:1	0.063"	1"-18	1/2"	Class 2C	Brinell 70	2,800	000000000	00000
1"-8	1 1/2"	1.5"	1	1:1	0.125"	1 3/8"-16	1/2"	Class 2C	Brinell 70	5,000	000000000	00000
1 1/2"-10	2 19/64"	2.125"	1	1:1	0.1"	1 31/32"-18	13/16"	Class 2C	Brinell 70	11,250	000000000	000000
673 Bronze
1/4"-16	5/8"	0.688"	1	1:1	0.063"	9/16"-18	3/8"	Class 2C	Brinell 70	Not Rated	000000000	00000
3/8"-12	5/8"	0.688"	1	1:1	0.083"	9/16"-18	3/8"	Class 2C	Brinell 70	Not Rated	000000000	00000
1/2"-10	3/4"	1.125"	1	1:1	0.1"	15/16"-16	1/2"	Class 2C	Brinell 70	Not Rated	000000000	00000
5/8"-5	1"	1.125"	1	1:1	0.2"	15/16"-16	1/2"	Class 2C	Brinell 70	Not Rated	000000000	00000
5/8"-8	1"	1.125"	1	1:1	0.125"	15/16"-16	1/2"	Class 2C	Brinell 70	Not Rated	000000000	00000
5/8"-10	1"	1.125"	1	1:1	0.1"	15/16"-16	1/2"	Class 2C	Brinell 70	Not Rated	000000000	00000
3/4"-5	1 1/4"	1.125"	1	1:1	0.2"	1"-18	1/2"	Class 2C	Brinell 70	Not Rated	000000000	00000
3/4"-6	1 1/4"	1.125"	1	1:1	0.167"	1"-18	1/2"	Class 2C	Brinell 70	Not Rated	000000000	00000
3/4"-10	1 1/4"	1.125"	1	1:1	0.1"	1"-18	1/2"	Class 2C	Brinell 70	Not Rated	000000000	00000
1"-4	1 1/2"	1.5"	1	1:1	0.25"	1 3/8"-16	1/2"	Class 2C	Brinell 70	Not Rated	000000000	00000
1"-5	1 1/2"	1.5"	1	1:1	0.2"	1 3/8"-16	1/2"	Class 2C	Brinell 70	Not Rated	000000000	00000
1"-6	1 1/2"	1.5"	1	1:1	0.167"	1 3/8"-16	1/2"	Class 2C	Brinell 70	Not Rated	000000000	00000
1"-10	1 1/2"	1.5"	1	1:1	0.1"	1 3/8"-16	1/2"	Class 2C	Brinell 70	Not Rated	000000000	00000
1 1/4"-4	1 3/4"	2.125"	1	1:1	0.25"	1 31/32"-18	13/16"	Class 2C	Brinell 70	Not Rated	000000000	000000
1 1/4"-5	1 3/4"	2.125"	1	1:1	0.2"	1 31/32"-18	13/16"	Class 2C	Brinell 70	Not Rated	000000000	000000
1 1/2"-4	2 19/64"	2.125"	1	1:1	0.25"	1 31/32"-18	13/16"	Class 2C	Brinell 70	Not Rated	000000000	000000
1 1/2"-5	2 19/64"	2.125"	1	1:1	0.2"	1 31/32"-18	13/16"	Class 2C	Brinell 70	Not Rated	000000000	000000
2"-4	2 3/4"	2.75"	1	1:1	0.25"	2 35/64"-18	7/8"	Class 2C	Brinell 70	Not Rated	000000000	000000

Flanges

Thread onto an externally threaded acme nut to create a custom flange nut.

1117 Carbon Steel
Flange Thread Size	Flange Dia.	Flange Thick.	Bolt Circle Dia.	Flange Hardness		Each
1 3/8"-16	2 49/64"	33/64"	2 17/64"	Brinell 156	000000000	000000
1 31/32"-18	4 13/64"	53/64"	3 7/16"	Brinell 156	000000000	00000
2 35/64"-18	4 15/16"	29/32"	4 1/16"	Brinell 156	000000000	00000
1215 Carbon Steel
9/16"-18	1 39/64"	13/32"	1 1/8"	Not Rated	000000000	00000
15/16"-16	2 5/8"	17/32"	2 3/32"	Not Rated	000000000	00000
1"-18	2 5/8"	17/32"	2 3/32"	Not Rated	000000000	00000
303 Stainless Steel
9/16"-18	1 39/64"	13/32"	1 1/8"	Brinell 140	0000000	00000
15/16"-16	2 5/8"	17/32"	2 3/32"	Brinell 140	0000000	00000
1"-18	2 5/8"	17/32"	2 3/32"	Brinell 140	0000000	00000
1 3/8"-16	2 49/64"	33/64"	2 17/64"	Brinell 140	0000000	00000
1 31/32"-18	4 13/64"	53/64"	3 7/16"	Brinell 140	0000000	000000
2 35/64"-18	4 15/16"	29/32"	4 1/16"	Brinell 140	0000000	000000

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.

Carbon steel lead screws and flanges have good machinability. Black-oxide alloy steel lead screws are hard and strong. They have mild corrosion resistance. 360 brass nuts have excellent machinability and good corrosion resistance. 932 bearing bronze and 673 bronze nuts are wear resistant. They have good machinability and fair corrosion resistance.

Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

For technical drawings and 3-D models, click on a part number.

Lead Screws—Left-Hand Threaded

1018 Carbon Steel
Thread Size	Lg., ft.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength, psi		Each
3/8"-12	3	2	2:1	0.167"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
3/8"-12	6	2	2:1	0.167"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
5/8"-8	3	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
5/8"-8	6	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/4"-6	3	2	2:1	0.333"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/4"-6	6	2	2:1	0.333"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/4"-8	3	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/4"-8	6	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1"-4	3	2	2:1	0.5"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1"-4	6	2	2:1	0.5"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1"-6	3	2	2:1	0.333"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1"-6	6	2	2:1	0.333"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1"-10	3	10	10:1	1"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1"-10	6	10	10:1	1"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1 1/2"-4	3	2	2:1	0.5"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1 1/2"-4	6	2	2:1	0.5"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
Black-Oxide 4140 Alloy Steel
3/8"-12	3	2	2:1	0.167"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	00000
3/8"-12	6	2	2:1	0.167"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
3/4"-6	3	2	2:1	0.333"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	00000
3/4"-6	6	2	2:1	0.333"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
1"-10	3	10	10:1	1"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
1"-10	6	10	10:1	1"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000

Round Nuts—Left-Hand Threaded

932 Bearing Bronze
Thread Size	Lg.	Dia.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Hardness	Dynamic Thrust Load Cap., lbs.		Each
1/4"-12	3/4"	1.344"	4	4:1	0.333"	Class 2C	Brinell 65	320	00000000	000000
3/8"-8	3/4"	1.344"	2	2:1	0.25"	Class 2C	Brinell 65	700	00000000	00000
3/8"-8	3/4"	1.344"	4	4:1	0.5"	Class 2C	Brinell 65	700	00000000	00000
3/8"-10	3/4"	1.344"	2	2:1	0.2"	Class 2C	Brinell 65	700	00000000	00000
1/2"-10	1"	1.469"	5	5:1	0.5"	Class 2C	Brinell 65	1,300	00000000	00000

Externally Threaded Nuts—Left-Hand Threaded

Combine externally threaded nuts with a flange to create a custom flange nut.

						External Thread
Thread Size	Lg.	Dia.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Size	Lg.	Thread Fit	Hardness	Dynamic Thrust Load Cap., lbs.		Each
360 Brass
5/8"-8	1"	1.125"	2	2:1	0.25"	15/16"-16	1/2"	Class 2C	Brinell 70	1,900	000000000	000000
3/4"-8	1 1/4"	1.125"	2	2:1	0.25"	1"-18	1/2"	Class 2C	Brinell 70	2,800	000000000	00000
1"-4	1 1/2"	1.5"	2	2:1	0.5"	1 3/8"-16	1/2"	Class 2C	Brinell 70	5,000	000000000	00000
1"-6	1 1/2"	1.5"	2	2:1	0.333"	1 3/8"-16	1/2"	Class 2C	Brinell 70	5,000	000000000	00000
673 Bronze
3/8"-12	5/8"	0.688"	2	2:1	0.167"	9/16"-18	3/8"	Class 2C	Brinell 70	Not Rated	000000000	00000
3/4"-6	1 1/4"	1.125"	2	2:1	0.333"	1"-18	1/2"	Class 2C	Brinell 70	Not Rated	000000000	00000
1"-10	1 1/2"	1.5"	10	10:1	1"	1 3/8"-16	1/2"	Class 2C	Brinell 70	Not Rated	000000000	00000
1 1/2"-4	2 19/64"	2.125"	2	2:1	0.5"	1 31/32"-18	13/16"	Class 2C	Brinell 70	Not Rated	000000000	000000

Flanges

Thread onto an externally threaded acme nut to create a custom flange nut.

1117 Carbon Steel
Flange Thread Size	Flange Dia.	Flange Thick.	Bolt Circle Dia.	Flange Hardness		Each
1 3/8"-16	2 49/64"	33/64"	2 17/64"	Brinell 156	000000000	000000
1 31/32"-18	4 13/64"	53/64"	3 7/16"	Brinell 156	000000000	00000
1215 Carbon Steel
9/16"-18	1 39/64"	13/32"	1 1/8"	Not Rated	000000000	00000
15/16"-16	2 5/8"	17/32"	2 3/32"	Not Rated	000000000	00000
1"-18	2 5/8"	17/32"	2 3/32"	Not Rated	000000000	00000
303 Stainless Steel
9/16"-18	1 39/64"	13/32"	1 1/8"	Brinell 140	0000000	00000
15/16"-16	2 5/8"	17/32"	2 3/32"	Brinell 140	0000000	00000
1"-18	2 5/8"	17/32"	2 3/32"	Brinell 140	0000000	00000
1 3/8"-16	2 49/64"	33/64"	2 17/64"	Brinell 140	0000000	00000
1 31/32"-18	4 13/64"	53/64"	3 7/16"	Brinell 140	0000000	000000