Down Load Wave Threaded Stud, Nuts, Bolt; and standard UNC threaded nut, bolts and studs: last update 12/06/2018

This is the first 3D print layout. The three nuts are different sizes becuase 3D printing is a collection of linear movements so the surface is not curved. Different sizes have to be tried to get the best fit. The female threaded nuts are changed to find the best fit with the least amount of waste.
The resolution is Z 0.004" and X,Y 0.015".

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The male will come through to the end of the nut thread shown above. The goal is for the male thread to be even with the surface of the female thread. Not inside or outside, but even as shown in the above drawing.
3D printing is a collection of linear movements, so the surface is not curved. Different sizes have to be tried to get the closest surface contact. There are 5 female nut threads Nut A:+0.005"; Nut B:+0.010"; Nut C:+0.015"; Nut D:+0.020"; and Nut E:+0.025". The middle nuts B, C and D are suggested. Experience has shown the 0.015" of Nut C will be the most common one to work, but different machines and different resolutions .

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It is better to test the threads with smaller files. Each of these are different heights shown so they can be kept seperate. Print the bolt first, then print the B and C test thread and see if the come out even as shown above.

pick the sizes and down load by double clicking on them. Then test them with the bolt below
TEST_NUT_A_AZ2K_250.STL
TEST_NUT_B_AZ2P_300.STL
TEST_NUT_C_AZ2R_350.STL
TEST_NUT_D_AZ2S_400.STL
TEST_NUT_E_AZ2U_450.STL


These are the full size wave thread Nuts. After the above testing, pick the letter size that fit the best.
Nut_A_AZK2KN_A12.STL
Nut_B_AZK2PN_B12.STL
Nut_C_AZK2KN_C12.STL
Nut_D_AZK2KN_D12.STL
Nut_E_AZK2KN_E12.STL

Wave threaded Bolt with a 1" shank. Bolt_AZ2KB_S1.STL




Next are the corresponding UNC (Unified National Course) threaded nut and bolt. The larger nut is for use in destructive testing.



This has a 7/8" diameter with 9 TPI (Threads Per Inch). The bolt has a 1" shank and 2" thread designed for destructive testing in comparison with wave thread. The 0.75" nut is the standard size for this bolt. The 1.5" nut to match the length of the wave threaded nut for destructive testing. Both wave and UNC bolts have the same clamp length, the 1" shank.

These nuts and bolt are class 2, the most common. Classes are a measure of fit and class 2 is larger enough for 3d printing. 3D printing is a collection of straight lines which effects how well threads fit. The wave threads are total surface contact so the fit has to match the printer resolution as close as possible.



UNC Nut 1.50" for destructive testing Nut_UNC_AZ1JN075.STL
UNC Nut 0.75" Nut_UNC_AZ1JN150.STL
UNC Bolt Bolt_UNC_AZ1JB100.STL

The UNC thread has to be at longer by at least 67% of its width. This has to do with a "stress cone" when it is under load. The UNC bolt has a 2" thread and the longer nut is 1 1/2" to be assembled as shown below. The 1" shank is the clamp length.



The 7/8 UNC stud is similar to the bolt execept with thread on each end. The second stud with a UNC and Wave thread on each end is for destructive testing. The third is Wave thread on each end. One destructive test of 3D printed parts pulled the heads of the bolts off while the Wave threades studs were 17.5% stronger then they were supposed to be. The studs are specifically for destructive testing to produce a strength of UNC threads only, NUC and wave threads; and wave threads only. It is expected that the wave thread only parts will have the strongest tensile strength.


Download Studs
UNC-UNC Stud_AZ4@_UU1.STL
UNC-UNC Stud_AZ4F_WU1.STL
UNC-UNC Stud_AZ2V_WW1.STL