BIG-SERT 1/4-20 Home / Shop BIG-SERT 1/4-20 $90.08 Home / Shop BIG-SERT 1/4-20 $90.08 Model Number: 5420 Maximum quantity exceeded Minimum purchase amount of 0 is required Maximum purchase amount of 0 is allowed 90.080 10000000 Categories: Big-Sert Inch Oversized Kits Manufacturer: TIME-SERT Description Kit includes all the tools and 5 inserts .380 inches in length. Big-Sert Inch Inserts Need a tap guide?