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    83 Products

    Ball Screws and Nuts

    Image of ProductInUse. Front orientation. Contains Inset. Ball Screws and Nuts. Ball Screws and Nuts .
    Image of Product. A. Front orientation. Contains Annotated. Ball Screws and Nuts. Ball Screws and Nuts , Ball Nuts, Externally Threaded Nut, Style A.
    Image of Product. Front orientation. Contains Annotated. Ball Screws and Nuts. Ball Screws and Nuts , Ball Nuts, Flange Nut, Style D.

    A

    Ball Nuts

    Flange Nut

    Style D

    Internal ball bearings provide smooth low-friction travel in applications that require high speeds, accurate positioning, and repeatable movement. Also known as single-start ball screws and nuts, they have a single thread that runs the length of the screw. They operate with more torque than fast-travel ball screws and nuts. To ensure compatibility, select components that have the same thread direction and size. Ball nuts are furnished with a tube to keep ball bearings in place. Do not remove the tube until you are ready to install the nuts onto the screws.
    Ball Screws—Right-Hand Threaded
    Image of Product. Front orientation. Ball Screws and Nuts. Ball Screws and Nuts , Ball Screws.
    Image of Attribute. Front orientation. Contains Annotated. Ball Screws and Nuts .
    Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.
    Root Diameter—Root diameter indicates the diameter the ball screw will be after machining away the threads.
    Thread
    Size
    Lg.,
    ft.
    No. of Thread
    Starts
    Travel Distance
    per Turn
    Accuracy for Travel
    Distance per Turn
    Root
    Dia.
    Hardness
    Tensile Strength,
    psi
    Temp. Range,
    ° F
    Each
    Alloy Steel
    3/8"-8
    		110.125"±0.007"/1 ft.0.3"Rockwell C5685,000-65 to 3003405N4320000000
    3/8"-8
    		210.125"±0.007"/1"0.3"Rockwell C5685,000-65 to 3003405N433000000
     
    Externally Threaded Ball Nuts—Right-Hand Threaded
    Image of Product. A. Front orientation. Contains Annotated. Ball Screws and Nuts. Ball Screws and Nuts , Ball Nuts, Externally Threaded Nut, Style A.

    A

    Black-Oxide Alloy Steel—Black-oxide alloy steel ball nuts have mild corrosion resistance.
    Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.
    Style
    Thread
    Size
    Lg.
    Dia.
    No. of Thread
    Starts
    Travel Distance
    per Turn
    External Thread
    Size
    Hardness
    Dynamic Thrust
    Load Cap., lb.
    Max.
    Backlash
    Temp. Range,
    ° F
    Each
    Black-Oxide Alloy Steel
    A3/8"-8
    		1"3/4"10.125"11/16"-28Rockwell C561700.015"-65 to 3003405N4580000000
     
    Flange Ball Nuts—Right-Hand Threaded
    Image of Product. Front orientation. Contains Annotated. Ball Screws and Nuts. Ball Screws and Nuts , Ball Nuts, Flange Nut, Style D.
    Image of Attribute. Front orientation. Contains Annotated. Ball Screws and Nuts .

    Style D

    Black-Oxide Alloy Steel—Black-oxide alloy steel ball nuts have mild corrosion resistance.
    Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.
    Flange
    Style
    Thread
    Size
    Lg.
    Dia.
    Dia.
    Thk.
    No. of Thread
    Starts
    Travel Distance
    per Turn
    Bolt Circle
    Dia.
    Hardness
    Dynamic Thrust
    Load Cap., lb.
    Max.
    Backlash
    Temp. Range,
    ° F
    Each
    Black-Oxide Alloy Steel
    D3/8"-8
    		1 1/64"3/4"1 19/32"9/32"10.125"1 15/64"Rockwell C561700.015"-65 to 3003405N4690000000
     

    Acme Lead Screws and Nuts

    Image of ProductInUse. Front orientation. Contains Inset. Lead Screws and Nuts. 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
    Image of Product. Front orientation. Lead Screws and Nuts. Acme Lead Screws and Nuts, Lead Screws—Right-Hand Thread.
    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.
    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
    Size
    Thread
    Type
    Lg.
    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"-8
    		Stub Acme12"11:10.125"Acme Class 2G
    		SAE Grade 2
    		Rockwell B6164,000ASTM A10898935A706000000
    3/8"-8
    		Stub Acme3 ft.11:10.125"Acme Class 2G
    		SAE Grade 2
    		Rockwell B6164,000ASTM A10898935A80700000
    3/8"-8
    		Stub Acme6 ft.11:10.125"Acme Class 2G
    		SAE Grade 2
    		Rockwell B6164,000ASTM A10898935A21100000
     
    Zinc-Plated Carbon Steel
    3/8"-8
    		Stub Acme12"11:10.125"Acme Class 2G
    		SAE Grade 2
    		Rockwell B6168,000ASTM A10898941A73000000
    3/8"-8
    		Stub Acme3 ft.11:10.125"Acme Class 2G
    		SAE Grade 2
    		Rockwell B6168,000ASTM A10898941A42000000
    3/8"-8
    		Stub Acme6 ft.11:10.125"Acme Class 2G
    		SAE Grade 2
    		Rockwell B6168,000ASTM A10898941A24000000
     
    Alloy Steel
    3/8"-8
    		Stub Acme12"11:10.125"Acme Class 2G
    		ASTM Grade B7
    		Rockwell C35125,000ASTM A193
    		93410A90800000
    3/8"-8
    		Stub Acme3 ft.11:10.125"Acme Class 2G
    		ASTM Grade B7
    		Rockwell C35125,000ASTM A193
    		93410A60700000
    3/8"-8
    		Stub Acme6 ft.11:10.125"Acme Class 2G
    		ASTM Grade B7
    		Rockwell C35125,000ASTM A193
    		93410A310000000
     
    18-8 Stainless Steel
    3/8"-8
    		Stub Acme12"11:10.125"Acme Class 2G
    		—Rockwell B96Not Rated—95061A60300000
    3/8"-8
    		Stub Acme3 ft.11:10.125"Acme Class 2G
    		—Rockwell B96Not Rated—95061A80700000
    3/8"-8
    		Stub Acme6 ft.11:10.125"Acme Class 2G
    		—Rockwell B96Not Rated—95061A513000000
     
    316 Stainless Steel
    3/8"-8
    		Stub Acme12"11:10.125"Acme Class 2G
    		ASTM Grade B8M
    		Rockwell B9775,000ASTM A193
    		97014A59000000
    3/8"-8
    		Stub Acme3 ft.11:10.125"Acme Class 2G
    		ASTM Grade B8M
    		Rockwell B9775,000ASTM A193
    		97014A31000000
    3/8"-8
    		Stub Acme6 ft.11:10.125"Acme Class 2G
    		ASTM Grade B8M
    		Rockwell B9775,000ASTM A193
    		97014A13000000
     
    Lead Screws—Left-Hand Thread
    Image of Product. Front orientation. Lead Screws and Nuts. Acme Lead Screws and Nuts, Lead Screws—Left-Hand Thread.
    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
    Size
    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
    Alloy Steel
    3/8"-8
    		Stub Acme311:10.125"Acme Class 2G
    		ASTM Grade B7
    		Rockwell C35125,000ASTM A193
    		93410A409000000
    3/8"-8
    		Stub Acme611:10.125"Acme Class 2G
    		ASTM Grade B7
    		Rockwell C35125,000ASTM A193
    		93410A41000000
     
    Hex Nuts—Right-Hand Thread
    Image of Product. Front orientation. Lead Screws and Nuts. Acme Lead Screws and Nuts, 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
    Size
    Thread
    Type
    Ht.
    Wd.
    No. of Thread
    Starts
    Speed
    Ratio
    Travel Distance
    per Turn
    Thread Fit
    Hardness
    Tensile
    Strength
    Each
    Carbon Steel
    3/8"-8
    		Stub Acme23/64"11/16"11:10.125"Acme Class 2G
    		Rockwell B75Not Rated94815A01100000
     
    Zinc-Plated Carbon Steel
    3/8"-8
    		Acme
    		23/64"11/16"11:10.125"Acme Class 2G
    		Rockwell B75Not Rated98948A11200000
     
    18-8 Stainless Steel
    3/8"-8
    		Stub Acme23/64"11/16"11:10.125"Acme Class 2G
    		Rockwell B97Not Rated95066A20600000
     
    Hex Nuts—Left-Hand Thread
    Image of Product. Front orientation. Lead Screws and Nuts. Acme Lead Screws and Nuts, 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
    Size
    Thread
    Type
    Ht.
    Wd.
    No. of Thread
    Starts
    Speed
    Ratio
    Travel Distance
    per Turn
    Thread Fit
    Fastener Strength
    Grade/Class
    Hardness
    Tensile Strength,
    psi
    Each
    Carbon Steel
    3/8"-8
    		Stub Acme23/64"11/16"11:10.125"Acme Class 2G
    		SAE Grade 2
    		Rockwell B8564,00091808A01400000
     
    18-8 Stainless Steel
    3/8"-8
    		Stub Acme23/64"11/16"11:10.125"Acme Class 2G
    		—Rockwell B97Not Rated95066A35500000
     

    Fast-Travel Precision Acme Lead Screws and Nuts

    Image of ProductInUse. Front orientation. Contains Inset. Precision Lead Screws and Nuts. 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
    Image of Product. Front orientation. Precision Lead Screws and Nuts. Fast-Travel Precision Acme Lead Screws and Nuts, Lead Screws—Right-Hand Thread.
    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.
    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.
    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
    1018 Low-Carbon Steel
    3/8"-8
    		18"Stub Acme2:120.25"±0.009"/1 ft.Acme Class 2C
    		Not RatedNot Rated99030A986000000
    3/8"-8
    		18"Stub Acme4:140.5"±0.009"/1 ft.Acme Class 2C
    		Not RatedNot Rated99030A98700000
    3/8"-8
    		3 ft.Stub Acme2:120.25"±0.009"/1 ft.Acme Class 2C
    		Brinell 12664,00099030A31500000
    3/8"-8
    		3 ft.Stub Acme4:140.5"±0.009"/1 ft.Acme Class 2C
    		Brinell 12664,00099030A30300000
    3/8"-8
    		6 ft.Stub Acme2:120.25"±0.009"/1 ft.Acme Class 2C
    		Brinell 12664,00099030A71500000
    3/8"-8
    		6 ft.Stub Acme4:140.5"±0.009"/1 ft.Acme Class 2C
    		Brinell 12664,00099030A70300000
     
    Black-Oxide 4140 Alloy Steel
    3/8"-8
    		3 ft.Stub Acme2:120.25"±0.009"/1 ft.Acme Class 2C
    		Brinell 271125,00098940A60900000
    3/8"-8
    		3 ft.Stub Acme4:140.5"±0.009"/1 ft.Acme Class 2C
    		Brinell 271125,00098940A60700000
    3/8"-8
    		6 ft.Stub Acme2:120.25"±0.009"/1 ft.Acme Class 2C
    		Brinell 271125,00098940A008000000
    3/8"-8
    		6 ft.Stub Acme4:140.5"±0.009"/1 ft.Acme Class 2C
    		Brinell 271125,00098940A006000000
     
    304 Stainless Steel
    3/8"-8
    		18"Stub Acme2:120.25"±0.009"/1 ft.Acme Class 2C
    		Not RatedNot Rated98980A96900000
    3/8"-8
    		18"Stub Acme4:140.5"±0.009"/1 ft.Acme Class 2C
    		Not RatedNot Rated98980A97200000
    3/8"-8
    		3 ft.Stub Acme2:120.25"±0.009"/1 ft.Acme Class 2C
    		Not RatedNot Rated98980A97100000
    3/8"-8
    		3 ft.Stub Acme4:140.5"±0.009"/1 ft.Acme Class 2C
    		Not RatedNot Rated98980A97300000
    3/8"-8
    		6 ft.Stub Acme2:120.25"±0.009"/1 ft.Acme Class 2C
    		Brinell 15072,00098980A330000000
    3/8"-8
    		6 ft.Stub Acme4:140.5"±0.009"/1 ft.Acme Class 2C
    		Brinell 15072,00098980A325000000
     
    Round Nuts—Right-Hand Thread
    Image of Product. Front orientation. Precision Lead Screws and Nuts. Fast-Travel Precision Acme Lead Screws and Nuts, Round Nuts—Right-Hand Thread.
    Iron—Iron nuts have good machinability and high strength.
    932 Bearing 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.
    Thread
    Size
    Lg.
    Dia.
    Thread
    Type
    Speed
    Ratio
    No. of Thread
    Starts
    Travel Distance
    per Turn
    Thread Fit
    Hardness
    Tensile
    Strength
    Dynamic Thrust
    Load Cap., lb.
    Temp.,
    ° F
    Each
    Iron
    3/8"-8
    		3/4"1.344"Stub Acme2:120.25"Acme Class 2C
    		Brinell 217Not RatedNot Rated—95365A504000000
    3/8"-8
    		3/4"1.344"Stub Acme4:140.5"Acme Class 2C
    		Brinell 217Not RatedNot Rated—95365A50100000
     
    932 Bearing Bronze
    3/8"-8
    		3/4"1.344"Acme
    		2:120.25"Acme Class 2C
    		Brinell 65Not Rated700—1343K11400000
    3/8"-8
    		3/4"1.344"Acme
    		4:140.5"Acme Class 2C
    		Brinell 65Not Rated700—1343K11100000
     
    PET
    3/8"-8
    		3/4"1.344"Acme
    		2:120.25"Acme Class 2C
    		Not RatedNot Rated35015 to 1751349K10700000
    3/8"-8
    		3/4"1.344"Acme
    		4:140.5"Acme Class 2C
    		Not RatedNot Rated35015 to 1751349K10100000
     
    Round Nuts—Left-Hand Thread
    Image of Product. Front orientation. Precision Lead Screws and Nuts. Fast-Travel Precision Acme Lead Screws and Nuts, Round Nuts—Left-Hand Thread.
    932 Bearing 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.
    Thread
    Size
    Lg.
    Dia.
    Thread
    Type
    Speed
    Ratio
    No. of Thread
    Starts
    Travel Distance
    per Turn
    Thread Fit
    Hardness
    Tensile
    Strength
    Dynamic Thrust
    Load Cap., lb.
    Each
    932 Bearing Bronze
    3/8"-8
    		3/4"1.344"Acme
    		2:120.25"Acme Class 2C
    		Brinell 65Not Rated7001343K214000000
    3/8"-8
    		3/4"1.344"Acme
    		4:140.5"Acme Class 2C
    		Brinell 65Not Rated7001343K21100000
     
    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.
    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., lb.
    Temp.,
    ° F
    Each
    673 Bronze
    3/8"-8
    		5/8"0.688"Stub Acme2:120.25"9/16"-18
    		3/8"Acme Class 2C
    		Brinell 70Not RatedNot Rated—95072A126000000
    3/8"-8
    		5/8"0.688"Stub Acme4:140.5"9/16"-18
    		3/8"Acme Class 2C
    		Brinell 70Not RatedNot Rated—95072A12500000
     
    PET
    3/8"-8
    		5/8"0.688"Acme
    		2:120.25"9/16"-18
    		3/8"Acme Class 2C
    		Not RatedNot Rated35015 to 17595075A22600000
    3/8"-8
    		5/8"0.688"Acme
    		4:140.5"9/16"-18
    		3/8"Acme Class 2C
    		Not RatedNot Rated35015 to 17595075A22500000
     
    Flanges
    Image of Product. Front orientation. Precision Lead Screw Nut 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 Thread
    Size
    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 Rated95082A641000000
     
    303 Stainless Steel
    9/16"-18
    		1 39/64"13/32"1 1/8"Brinell 1401329K1100000
     

    Fast-Travel Ultra-Precision Lead Screws and Nuts

    Image of ProductInUse. Front orientation. Contains Inset. Precision Lead Screws and Nuts. Fast-Travel Ultra-Precision Lead Screws and Nuts.
    Image of Product. Style B. Front orientation. Contains Annotated. Precision Lead Screws and Nuts. Fast-Travel Ultra-Precision Lead Screws and Nuts, Flange Nuts—Right-Hand Thread, Style B.
    Image of Product. Style C. Front orientation. Contains Annotated. Precision Lead Screws and Nuts. Fast-Travel Ultra-Precision Lead Screws and Nuts, Flange Nuts—Right-Hand Thread, Style C.

    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
    Image of Product. Front orientation. Precision Lead Screws and Nuts. Fast-Travel Ultra-Precision Lead Screws and Nuts, 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.
    Thread
    Size
    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"-8
    		3Rounded Acme
    		2:120.25"±0.0006"/1"Brinell 16090,0006350K7070000000
    3/8"-8
    		3Rounded Acme
    		4:140.5"±0.0006"/1"Brinell 16090,0006350K708000000
    3/8"-8
    		6Rounded Acme
    		4:140.5"±0.0006"/1"Brinell 16090,0006350K15000000
     
    Flange Nuts—Right-Hand Thread
    Image of Product. Style B. Front orientation. Contains Annotated. Precision Lead Screws and Nuts. Fast-Travel Ultra-Precision Lead Screws and Nuts, Flange Nuts—Right-Hand Thread, Style B.
    Image of Product. Style C. Front orientation. Contains Annotated. Precision Lead Screws and Nuts. Fast-Travel Ultra-Precision Lead Screws and Nuts, Flange Nuts—Right-Hand Thread, Style C.

    Style B

    Style C

    Image of Attribute. Front orientation. Contains Annotated. Fast-Travel Ultra-Precision Lead Screws and Nuts, Nuts, Flange Nut, Style B.
    Image of Attribute. Front orientation. Contains Annotated. Fast-Travel Ultra-Precision Lead Screws and Nuts, Nuts, Flange Nut, 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
    B3/8"-8
    		1"0.625"1 7/64"3/16"Rounded Acme
    		4:17/8"40.5"Not Rated9,7007536350K35000000
     
    Acetal with Wear-Compensating Spring
    C3/8"-8
    		1 29/32"0.703"1 1/2"3/16"Rounded Acme
    		4:11 1/8"40.5"Not Rated9,7001036350K5500000
     

    Corrosion-Resistant Ball Screws and Nuts

    Image of ProductInUse. Front orientation. Contains Inset. Ball Screws and Nuts. Corrosion-Resistant Ball Screws and Nuts.
    Image of Product. Front orientation. Contains Annotated. Ball Screws and Nuts. Corrosion-Resistant Ball Screws and Nuts, Ball Nuts, Externally Threaded Nut, Style A.
    Image of Product. Front orientation. Contains Annotated. Ball Screws and Nuts. Corrosion-Resistant Ball Screws and Nuts, Ball Nuts, Flange Nut, Style C.

    Ball Nuts,

    Externally

    Threaded

    Nut, Style A

    Ball Nuts

    Flange Nut

    Style C

    Suitable for use in harsh environments, these ball screws and nuts are made of stainless steel. Internal ball bearings provide smooth low-friction travel in applications that require high speeds, accurate positioning, and repeatable movement. Also known as single-start ball screws and nuts, they have a single thread that runs the length of the screw. They operate with more torque than fast-travel ball screws and nuts. To ensure compatibility, select components that have the same thread size. Ball nuts are furnished with a tube to keep ball bearings in place. Do not remove the tube until you are ready to install the nuts onto the screws.
    Ball Screws—Right-Hand Threaded
    Image of Product. Front orientation. Ball Screws and Nuts. Corrosion-Resistant Ball Screws and Nuts, Ball Screws.
    Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.
    Root Diameter—Root diameter indicates the diameter the ball screw will be after machining away the threads.
    Thread
    Size
    Lg.,
    ft.
    No. of Thread
    Starts
    Travel Distance
    per Turn
    Accuracy for Travel
    Distance per Turn
    Root
    Dia.
    Hardness
    Tensile Strength,
    psi
    Temp. Range,
    ° F
    Each
    17-4 PH Stainless Steel
    3/8"-8
    		110.125"±0.005"/1 ft.0.3"Rockwell C38150,000-65 to 3006641K130000000
    3/8"-8
    		210.125"±0.004"/1 ft.0.3"Rockwell C38145,000-65 to 3006641K1000000
    3/8"-8
    		410.125"±0.004"/1 ft.0.3"Rockwell C38145,000-65 to 3006641K2000000
     
    Externally Threaded Ball Nuts—Right-Hand Threaded
    Image of Product. Front orientation. Contains Annotated. Ball Screws and Nuts. Corrosion-Resistant Ball Screws and Nuts, Ball Nuts, Externally Threaded Nut, Style A.

    Style A

    Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.
    Style
    Thread
    Size
    Lg.
    Dia.
    No. of Thread
    Starts
    Travel Distance
    per Turn
    External Thread
    Size
    Hardness
    Dynamic Thrust
    Load Cap., lb.
    Max.
    Backlash
    Temp. Range,
    ° F
    Each
    17-4 PH Stainless Steel
    A3/8"-8
    		1"3/4"10.125"0.664"-32
    		Rockwell C38250.007"-65 to 3006641K90000000
     
    Flange Ball Nuts—Right-Hand Threaded
    Image of Product. Front orientation. Contains Annotated. Ball Screws and Nuts. Corrosion-Resistant Ball Screws and Nuts, Ball Nuts, Flange Nut, Style C.
    Image of Attribute. Front orientation. Contains Annotated. Corrosion-Resistant Ball Screws and Nuts.

    Style C

    Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.
    Flange
    Style
    Thread
    Size
    Lg.
    Dia.
    Dia.
    Thk.
    No. of Thread
    Starts
    Travel Distance
    per Turn
    Bolt Circle
    Dia.
    Hardness
    Dynamic Thrust
    Load Cap., lb.
    Max.
    Backlash
    Temp. Range,
    ° F
    Each
    17-4 PH Stainless Steel
    C3/8"-8
    		1"3/4"1 19/32"17/64"10.125"1 15/64"Rockwell C38250.007"-65 to 3006641K210000000
     

    Precision Acme Lead Screws and Nuts

    Image of ProductInUse. Front orientation. Contains Inset. Precision Lead Screws and Nuts. 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
    Image of Product. Front orientation. Precision Lead Screws and Nuts. Precision Acme Lead Screws and Nuts, Lead Screws—Right-Hand Thread.
    Image of Attribute. Right-Hand Threads. Front orientation. Right-Hand Thread. Precision Acme Lead Screws and Nuts, Lead Screws.

    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.
    Thread
    Size
    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"-8
    		3Stub Acme1:110.125"±0.009"/1 ft.Acme Class 2C
    		Brinell 12664,00099030A326000000
    3/8"-8
    		6Stub Acme1:110.125"±0.009"/1 ft.Acme Class 2C
    		Brinell 12664,00099030A72600000
     
    Black-Oxide 4140 Alloy Steel
    3/8"-8
    		3Stub Acme1:110.125"±0.009"/1 ft.Acme Class 2C
    		Brinell 271125,00098940A60500000
    3/8"-8
    		6Stub Acme1:110.125"±0.009"/1 ft.Acme Class 2C
    		Brinell 271125,00098940A00400000
     
    304 Stainless Steel
    3/8"-8
    		3Stub Acme1:110.125"±0.009"/1 ft.Acme Class 2C
    		Brinell 15072,00098980A11400000
    3/8"-8
    		6Stub Acme1:110.125"±0.009"/1 ft.Acme Class 2C
    		Brinell 15072,00098980A320000000
     
    Lead Screws—Left-Hand Thread
    Image of Product. Front orientation. Precision Lead Screws and Nuts. Precision Acme Lead Screws and Nuts, Lead Screws—Left-Hand Thread.
    Image of Attribute. Left-Hand Threads. Front orientation. Left-Hand Thread. Precision Acme Lead Screws and Nuts, Lead Screws.

    Left-Hand Threads

    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.
    Thread
    Size
    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
    304 Stainless Steel
    3/8"-8
    		3Stub Acme1:110.125"±0.009"/1 ft.Acme Class 2C
    		Brinell 15072,00098980A001000000
    3/8"-8
    		6Stub Acme1:110.125"±0.009"/1 ft.Acme Class 2C
    		Brinell 15072,00098980A620000000
     
    Round Nuts—Right-Hand Thread
    Image of Product. Front orientation. Precision Lead Screws and Nuts. Precision Acme Lead Screws and Nuts, Round Nuts—Right-Hand Thread.
    Iron—Iron nuts have good machinability and high strength.
    932 Bearing 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.
    Thread
    Size
    Lg.
    Dia.
    Thread
    Type
    Speed
    Ratio
    No. of Thread
    Starts
    Travel Distance
    per Turn
    Thread Fit
    Hardness
    Tensile
    Strength
    Dynamic Thrust
    Load Cap., lb.
    Temp.,
    ° F
    Each
    Iron
    3/8"-8
    		3/4"1.344"Stub Acme1:110.125"Acme Class 2C
    		Brinell 217Not RatedNot Rated—95365A521000000
     
    932 Bearing Bronze
    3/8"-8
    		3/4"1.344"Acme
    		1:110.125"Acme Class 2C
    		Brinell 65Not Rated700—1343K13100000
     
    PET
    3/8"-8
    		3/4"1.344"Acme
    		1:110.125"Acme Class 2C
    		Not RatedNot Rated35015 to 1751349K13400000
     
    Round Nuts—Left-Hand Thread
    Image of Product. Front orientation. Precision Lead Screws and Nuts. Precision Acme Lead Screws and Nuts, Round Nuts—Left-Hand Thread.
    Iron—Iron nuts have good machinability and high strength.
    932 Bearing 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.
    Thread
    Size
    Lg.
    Dia.
    Thread
    Type
    Speed
    Ratio
    No. of Thread
    Starts
    Travel Distance
    per Turn
    Thread Fit
    Hardness
    Tensile
    Strength
    Dynamic Thrust
    Load Cap., lb.
    Temp.,
    ° F
    Each
    Iron
    3/8"-8
    		3/4"1.344"Stub Acme1:110.125"Acme Class 2C
    		Brinell 217Not RatedNot Rated—95365A621000000
     
    932 Bearing Bronze
    3/8"-8
    		3/4"1.344"Acme
    		1:110.125"Acme Class 2C
    		Brinell 65Not Rated700—1343K23100000
     
    PET
    3/8"-8
    		3/4"1.344"Acme
    		1:110.125"Acme Class 2C
    		Not RatedNot Rated35015 to 1751349K13500000
     
    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., lb.
    Temp.,
    ° F
    Each
    673 Bronze
    3/8"-8
    		5/8"0.688"Stub Acme1:110.125"9/16"-18
    		3/8"Acme Class 2C
    		Brinell 70Not RatedNot Rated—95072A124000000
     
    PET
    3/8"-8
    		5/8"0.688"Acme
    		1:110.125"9/16"-18
    		3/8"Acme Class 2C
    		Not RatedNot Rated35015 to 17595075A22400000
     
    Flanges
    Image of Product. Front orientation. Precision Lead Screw Nut 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 Thread
    Size
    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 1351329K101000000
     
    1215 Carbon Steel
    9/16"-18
    		1 39/64"13/32"1 1/8"Not Rated95082A64100000
     
    303 Stainless Steel
    9/16"-18
    		1 39/64"13/32"1 1/8"Brinell 1401329K1100000
     
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