3/8"-5 Threaded Rods | McMaster-Carr

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System of Measurement

Thread Size

Component

Travel Distance per Turn

Length

Speed Ratio

Number of Thread Starts

Nut Type

Externally Threaded

Flange

Material

303 Stainless Steel

1018 Low-Carbon Steel

Thread Type

Diameter

Thread Direction

Threading

Thread Fit

DFARS Specialty Metals

Exempt

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

Hardness

Brinell 126

Brinell 160

Not Rated

Export Control Classification Number (ECCN)

REACH

RoHS

Performance

Tensile Strength

40,000 psi to 99,999 psi

Not Rated

Flange Diameter

1 7/64"

1 1/2"

Dynamic Thrust Load Capacity

Less than 1,000 lb.

Mounting Hole Diameter

Maximum Temperature

9 Products

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., 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



	3/8"-5	3	Acme	5:1	5	1"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	000000000	000000


	3/8"-5	6	Acme	5:1	5	1"	±0.009"/1 ft.	Acme Class 2C	Brinell 126	64,000	000000000	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.

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., lb.	Temp., ° F		Each
PET



		3/8"-5	5/8"	0.688"	Acme	5:1	5	1"	9/16"-18	3/8"	Acme Class 2C	Not Rated	Not Rated	250	15 to 175	000000000	000000

Flanges

Image of Attribute. Front orientation. Contains Annotated.

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	000000000	000000


	303 Stainless Steel



			9/16"-18	1 39/64"	13/32"	1 1/8"	Brinell 140	0000000	00000

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



	3/8"-5	3	Rounded Acme	5:1	5	1"	±0.0006"/1"	Brinell 160	90,000	00000000	0000000


	3/8"-5	6	Rounded Acme	5:1	5	1"	±0.0006"/1"	Brinell 160	90,000	0000000	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	3/8"-5	1"	0.625"	1 7/64"	3/16"	Rounded Acme	5:1	7/8"	5	1"	Not Rated	9,700	75	3	0000000	000000


		Acetal with Wear-Compensating Spring



				C	3/8"-5	1 29/32"	0.703"	1 1/2"	3/16"	Rounded Acme	5:1	1 1/8"	5	1"	Not Rated	9,700	10	3	0000000	00000