Hex bolt(Full thread(Kongo(Coarse Steel Trivalent black(Black) 5 X 25 Pitch 0.8

The "15A" at the end of a size designation (such as M6x15A) represents the outer diameter of a standard steel pipe.
Just like screws, standard steel pipes secured with U-bolts have their own specifications.
Under these specifications, the outer diameter of standard steel pipes is not expressed in millimeters, but rather by a "nominal size" designation established within the standard steel pipe specifications.
For example, "15A" refers to a standard steel pipe with dimensions corresponding to that nominal size designation. In the case of 6x15A, this indicates a bolt used to secure a standard steel pipe with a nominal outer diameter of 15A (21.7 mm) using an M6 thread diameter.
In addition to standard steel pipe U-bolts, we also carry long shank for standard steel pipe, marine steel pipe mounting , cast iron pipe, and other types.

Due to the thick coating of hot-dip galvanizing, other surface treatments may not be compatible.
Additionally, even with the same hot-dip galvanizing, compatibility issues may arise when purchased from different suppliers.
Please be aware that returns may not be accepted in the above cases, so kindly confirm this before proceeding with your purchase.

U-bolts　

• Hex bolt full thread Kongo coarse pitch
• Nominal diameter (d) M5
• Length under head (L) 25.0
• Pitch 0.8
• Head height (k) Nominal 3.5 Tolerance ±0.15
• Width across flats (s) Nominal 8 Tolerance 0,-0.2
• Width across corners (e) Approx. 9.2