These T-Nuts are 100% Equivalent to the following manufacturers:

15FA3510 #8-32 thread – unique to Faztek!

15FA3513 – #10-32 thread:

• 80/20 #3201 or #40-3201
• T-SLOTS #651072
• Frame-World #EF-57

15FA3403 – #1/4-20 thread:

• 80/20 #3202 or #40-3202
• T-SLOTS #651073
• Frame-World #EF-56

15FA3503 – #5/16-18 thread:

• 80/20 #3203 or 40-3203
• T-SLOTS #651074
• Frame-World #EF-55

15MFA3925 – #M5 x 0.8 thread – unique to Faztek!

M6 x 1.0 thread: 

• 80/20 #3866 or 40-1964
• T-SLOTS #651393
• Frame-World #EF-59

15MFA3921 – M8 x 1.25 thread:

• 80/20 #3868 or 40-1984
• T-SLOTS #651395
• Frame-World #EF-58

The T-Nuts will fit in the 15 Series extrusions and can only be loaded from the end.  These Nuts are stronger than the Economy Style and great for heavy-duty applications.