ASME B18.9 No 7 Reverse Key Round Countersunk Head Plow Bolts

ASME B18.9 No 7 Reverse Key Round Countersunk Head Plow Bolts

Dimensions of ASME B18.9 No 7 Reverse Key Round Countersunk Head Plow Bolts

Nominal or Basic Bolt Diameter, D Diameter of Full Size Body, E Diameter of Head, A Maximum Feed Thickness, F Head Height, S Key Length, G
Max Min Max Min. Sharp ABS Min with flat Max Min Min Max
Regular Head
5/16 0.312 0.299 0.592 0.578 0.563 0.025 0.233 0.208 0.185 0.2
3/8 0.375 0.36 0.661 0.64 0.625 0.031 0.239 0.208 0.187 0.202
7/16 0.438 0.421 0.776 0.749 0.734 0.036 0.282 0.246 0.227 0.242
1/2 0.5 0.483 0.892 0.859 0.844 0.042 0.328 0.286 0.267 0.282
9/16 0.592 0.544 1.021 0.984 0.969 0.045 0.383 0.388 0.321 0.336
5/8 0.657 0.606 1.121 1.078 1.063 0.05 0.414 0.364 0.348 0.363
3/4 0.782 0.729 1.277 1.234 1.219 0.05 0.44 0.39 0.39 0.39
Repair Head
5/16 0.312 0.299 0.554 0.546 0.531 0.02 0.201 0.181 0.158 0.173
3/8 0.375 0.36 0.623 0.609 0.594 0.025 0.207 0.182 0.158 0..173
7/16 0.438 0.421 0.738 0.718 0.703 0.03 0.25 0.22 0.199 0.214
1/2 0.5 0.483 0.853 0.828 0.813 0.035 0.295 0.26 0.239 0.254
9/16 0.592 0.544 0.984 0.953 0.938 0.04 0.352 0.312 0.293 0.308
5/8 0.657 0.606 1.077 1.046 1.031 0.04 0.378 0.338 0.321 0.336
3/4 0.782 0.729 1.234 1.203 1.188 0.04 0.404 0.364 0.347 0.362

Notes :

  • Where specifying nominal size in decimals, zeros preceding the decimals and in the fourth decimal place shall be omitted.
  • This size is not recommended.
  • The letter "R" shall be shown on top of the repair head to distinguish it from the regular head bolt.