Spec.of Bolt:

For example:4 X 10 PW A  H  C (+)
1 Diameter
2 Length
3 Types of Heads B:Binding;  C:Cheese;   F(K):Countersunk Flat;    H:Hexagon      HW:Hexagon Washer;  

     O:Oval;   P:Pan;      R:Round      PW:Pan Washer;    T��Truss; 

4 Types of Points A��Self-tapping(JIS No.1)       AB:Self-tapping(JIS No.4)
                   B:Self-tapping(JIS No.2)         C:Self-tapping(JIS No.3)
                   P:Double-line Thread                 HL:Hi-Lo Thread 
                   U:Pineapple Thread                   T:Self-tapping Thread with Point-cut
                   M:Machine Thread                    CTT:Type-C Thread Forming 
                   PTT:Type-P Thread Forming        STT:Type-S Thread Forming
                   BTT:Type-B Thread Forming
5 Heat Treatment H:With Heat Treatment             N:Without Heat Treatment
6 Surface Treatment Zn:White Zinc     C:Color Zinc         B:Blue Zinc        F:Black Zinc           O:Black Oxide     

                         Ni:Nickel           Cr:Chromium 
7 Remark (+):Philips Recess                   (-):Slotted 
          (T):Torx                                          (H):Hexagon Recess
          (PZ):Pozidrive                                  (Y):Type-Y Recess
          (H):Type-H Recess                            (WIS):Spring Washer 
          (WIF):Flat Washer                              (WIT):Teeth Washer 
          (W=6mm):Washer Diameter =6mm          (W2SF):Spring & Flat Washer
          (SUS):Stainless Steel                   (Cu):Copper
          (Br):Brass                                 (8.8):Class-8.8 Bolt 
          (10.9):Class-10.9 Bolt                  (12.9):Class-12.9 Bolt 
          (R):Others