Our standard Plain leadnuts are suitable to be used on several thread forms. By matching the nut to the screw increases accuracy and reduces the stresses within the driven system.

We strive to ensure a precision fit tolerance between the nut and screw to ensure a more reliable linear movement. In some cases we utilise a PTFE impregnated plastic as the nut base which gives excellent wear, high load capacity and a high degree of structural integrity . Plain nuts are available for both right handed and the left handed threads. Other nut materials are available on request.

Application example.

Abssac limited has long been associated with supplying products into the nuclear physics industry and has recently maintained this trend by supplying lead screw and nut assemblies for use within a high vacuum diagnostic tool for particle accelerators. The leadscrew assembly was used to accurately displace two disk like structures that captivated a precision aperture, which in turn shaped a supersonic gas jet passing through them. Changing the distance between the disks, enabled the tailoring of the shape of the gas jet for diagnosis purposes. Finite repeatable linear accuracy, reliability and required to continuously work in a vacuum environment of 10-6 mbar, were some of the criteria of the application.The high vacuum environment also meant that out-gassing of the plastic materials employed for the nut could pose a problem to final diagnostics. After some consultation with various material suppliers., the material chosen for the nut was Toray Torelina PPS resin with GFRP.  (TORELINA* Polyphenylene Sulfide).

This high-performance engineering plastic TORELINA* resin provided excellent heat resistance, flame retardancy , chemical resistance and physical strength. Abssac was also able to supply the 2mm pitch flanged nut already degassed and certified using a GCMS (Gas Chromatograph Mass Spectrometer) which recorded the emitted compounds by mass number on a certified calibrated graph. After a 2 hour treatment and subsequent GCMS analysis the nuts were ready to be fitted to the 6mm diameter stainless steel screw and shipped in a sealed atmosphere packaging.
 
Standard Plain Nut Features:

  • Turcite-X plastic nuts provide low friction for high efficiency movement.
  • Lead nuts tapped in ACME, Unified National V, Metric V, and Metric Acme thread forms.
  • Separate mounting flanges can be assembled to our Plain lead nuts without integral flanges.

Flange Mounts

An optional Aluminium flange can be installed on our line of Plain lead nuts for additional mounting options. Please catalogue for further details.

RoundRectangleLarge TriangleSmall Triangle

Flange Mounts - Round

Flange Mounts - Rectangle

Flange Mounts - Large Triangle

Flange Mounts - Small Triangle

 

 


Precision Metric Leadscrew

ScrewsAvailable Nuts
Precision Metric LeadscrewMatching SN NutMatching SNF NutRound FlangeRectangle FlangeLarge Triangle FlangeSmall Triangle Flange
Thread NameDia.
(mm)
Lead
(mm)
Matching SN NutMatching SNF NutRound FlangeRectangle FlangeLarge Triangle FlangeSmall Triangle Flange
M3 x 0.5030.5   
M4 x 0.7040.7   
M5 x 0.8050.8   
M6 x 1.061 
M8 x 1.081   
M8 x 1.2581   
M10 X 1.25101.25   
M10 x 1.50101.5   
M10 x 2102   
M10 x 310.003.00   
M10 x 510.005.00   
M10 x 1010.0010.00   
M10 x 2010.0020.00   
M10 x 3510.0035.00   
M12 x 1.50121.5    
M12 x 1.75121.75    
M12 x 312.003.00   
M12 x 412.004.00   
M12 x 512.005.00   
M12 x 612.006.00   
M12 x 1012.0010.00   
M12 x 1512.0015.00   
M12 x 2512.0025.00   
M12 x 4512.0045.00   
M14 x 2.0142    
M16 x 1.50161.5    
M16 x 2.0162    
M16 x 416.004.00   
M16 x 516.005.00   
M16 x 816.008.00   
M16 x 1616.0016.00   
M16 x 2516.0025.00   
M16 x 3516.0035.00   
M20 x 420.004.00   
M20 x 820.008.00   
M20 x 1220.0012.00   
M20 x 1620.0016.00   
M20 x 2020.0020.00   
M20 x 4520.0045.00   
M24 x 524.005.00    
Key:   • Available

Vee Thread Leadscrew

ScrewsAvailable Nuts
Vee Thread LeadscrewMatching SN NutMatching MTS Nut
Vee Thread NameDia.
(mm) / (INCH)
Lead
(mm) / (INCH)
Matching SN NutMatching SNF Nut
(Equivelant)SNSNF
SV6x16mm1mm
SV25801/4INCH0.0125
SV25481/4INCH0.0208
SV25401/4INCH0.025
SV25361/4INCH0.0278
SV25321/4INCH0.0313
SV25281/4INCH0.0357
SV25241/4INCH0.0417
SV25201/4INCH0.05
SV37403/8INCH0.025
SV37323/8INCH0.0313
SV37243/8INCH0.0417
SV37203/8INCH0.05
SV37163/8INCH0.0625
SV37123/8INCH0.0833
SV50401/2INCH0.025
SV50301/2INCH0.0333
SV50201/2INCH0.05
SV50161/2INCH0.0625
SV50131/2INCH0.0769
Key:   • Available

 

ACME Leadscrew

ScrewsAvailable Nuts
ACME LeadscrewMatching SN NutMatching SNF NutRound FlangeRectangle FlangeLarge Triangle FlangeSmall Triangle Flange
Thread Name (inch)Thread Diameter (inch)Threads per InchThread StartsThread TypeThread Lead (inch)
Matching SN NutMatching SNF NutRound FlangeRectangle FlangeLarge Triangle FlangeSmall Triangle Flange
1/4-16-11/4INCH161acme0.0625  
1/4-16-21/4INCH162acme0.125  
1/4-16-41/4INCH164acme0.25  
1/4-20-11/4INCH201acme0.05  
5/16-8-25/16INCH82stub acme0.25     
5/16-8-45/16INCH84stub acme0.5     
3/8-10-13/8 INCH101acme0.1    
3/8-10-23/8 INCH102acme0.2    
3/8-12-13/8 INCH121acme0.0833    
3/8-12-23/8 INCH122acme0.1667    
3/8-16-13/8 INCH161acme0.0625    
3/8-20-13/8 INCH201acme0.05    
3/8-4-53/8 INCH45stub acme1.25    
3/8-5-53/8 INCH55stub acme1    
3/8-8-13/8 INCH81stub acme0.125    
3/8-8-23/8 INCH82stub acme0.25    
3/8-8-33/8 INCH83stub acme0.375    
3/8-8-43/8 INCH84stub acme0.5    
7/16-8-27/16INCH82stub acme0.25    
7/16-8-47/16INCH84stub acme0.5    
1/2-10-11/2INCH101acme0.1    
1/2-10-21/2INCH102acme0.2    
5/8-10-15/8INCH101acme0.1    
5/8-10-25/8INCH102acme0.2    
5/8-8-15/8INCH81stub acme0.125    
5/8-8-25/8INCH82stub acme0.25    
5/8-8-45/8INCH84stub acme0.5    
3/4-10-13/4INCH101acme0.1    
3/4-8-13/4INCH81acme0.125    
3/4-6-13/4INCH61acme0.167    
3/4-5-13/4INCH51acme0.2    
3/4-10-53/4INCH105acme0.5    
3/4-8-83/4INCH88acme1    
3/4-5-103/4INCH510acme2    
1.0-10-11.0 INCH101acme0.1     
1.0-8-11.0 INCH81acme0.125     
1.0-5-11.0 INCH51acme0.2     
1.0-4-11.0 INCH41acme0.25     
1.0-10-51.0 INCH105ACME0.5     
1.0-10-101.0 INCH1010ACME1     
Key:   • Available

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