DTGN M10x51x85mm U Bolts Round Kit - 4Set - 304 Stainless Steel U-Bolt Kit with Nuts, Washers, Frame Plate - Good for Pipe, Trailer, Automotive, Leaf Spring Fastener 4 June_2023_update the measuring error is: the

the measuring error is: the δ=D-L=D - Square root of ( D^2 - X^2)

1 Scissors with ruler - 5"

Thread Size: M10 x 102 mm / 0

don't connect through USB hub

DTGN M10x51x85mm U Bolts Round Kit - 4Set - 304 Stainless Steel U-Bolt Kit with Nuts, Washers, Frame Plate - Good for Pipe, Trailer, Automotive, Leaf Spring Fastener 4 June_2023_update the measuring error is: theDTGN M10x51x85mm U Bolts Round Kit 4Set 304 Stainless Steel U Bolt Kit with Nuts, Washers, Frame Plate Good for Pipe, Trailer, Automotive, Leaf Spring Fastener Product Features [U Bolts Round Kit]: Material: 304 Stainless Steel; Thread Type: Coarse Thread; Fit Object Size: 51mm 2inch; Thread Size: M6(D); O. D length: 85mm(L) 3. 35inch; Package Content: 4Set x U bolts Round Kit [Complete Kit Contents]: Includes: stainless steel U bolt, zinc plated