Plow bolt is a heavy duty fasteners which is widely found in farm, road construction and other heavy equipment, without non-protruding heads, a square neck or fin under the head to prevent turing of the bolts.

Wellbolt manufacture following plow bolts:
 

ASME B 18.9 - 2012 No.3 Regular Head Plow Bolts (Round, Countersunk, Square Neck) (A307, F468, F593, SAE J 429)

Screw Thread d

5/16 3/8 7/16 1/2 9/16 (5/8) (3/4) (7/8) (1)

d PP UNC ds max min dk max Min Sharp Abs Min With Flat k max min s max min e min R max

0.3125 0.3750 0.4375 0.5000 0.5625 0.6250 0.7500 0.8750 1.0000 18 16 14 13 12 11 10 9 8 0.312 0.375 0.438 0.500 0.592 0.657 0.782 0.938 1.062 0.299 0.360 0.421 0.483 0.544 0.606 0.729 0.853 0.976 0.605 0.708 0.826 0.945 1.045 1.147 1.303 1.512 1.700 0.578 0.671 0.781 0.890 1.000 1.094 1.250 1.469 1.656 0.538 0.624 0.729 0.831 0.924 1.013 1.169 1.344 1.532 0.269 0.312 0.364 0.417 0.461 0.506 0.541 0.626 0.690 0.228 0.262 0.306 0.349 0.389 0.426 0.461 0.526 0.590 0.325 0.387 0.450 0.515 0.578 0.640 0.765 0.906 1.031 0.313 0.375 0.438 0.500 0.563 0.625 0.750 0.875 1.000 0.417 0.491 0.580 0.668 0.732 0.819 0.996 1.160 1.336 0.031 0.047 0.047 0.047 0.078 0.078 0.078 0.094 0.094

ASME B 18.9 - 2012 No.3 Repair Head Plow Bolts (Round, Countersunk, Square Neck) (A307, F468, F593, SAE J 429)

Screw Thread d

5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1

d PP UNC ds max min dk max Min Sharp Abs Min With Flat k max min s max min e min R max

0.3125 0.3750 0.4375 0.5000 0.5625 0.6250 0.7500 0.8750 1.0000 18 16 14 13 12 11 10 9 8 0.312 0.375 0.438 0.500 0.592 0.657 0.782 0.938 1.062 0.299 0.360 0.421 0.483 0.544 0.606 0.729 0.853 0.976 0.556 0.659 0.779 0.898 1.002 1.096 1.252 1.465 1.653 0.531 0.624 0.734 0.843 0.953 1.047 1.203 1.422 1.609 0.496 0.584 0.689 0.793 0.882 0.976 1.132 1.309 1.497 0.232 0.272 0.324 0.375 0.423 0.458 0.493 0.573 0.637 0.200 0.232 0.276 0.319 0.359 0.394 0.429 0.493 0.557 0.325 0.387 0.450 0.515 0.578 0.640 0.765 0.906 1.031 0.313 0.375 0.438 0.500 0.563 0.625 0.750 0.875 1.000 0.417 0.491 0.580 0.668 0.732 0.819 0.996 1.160 1.336 0.031 0.047 0.047 0.047 0.078 0.078 0.078 0.094 0.094

ANSI/ASME B 18.9 - 2012 No.6 repair head plow bolts (Countersunk,heavy key) [Table 4] (A307, F468, F593, SAE J 429)

ANSI/ASME B 18.9 - 2012 No.7 Head Plow Bolts (Round, Countersunk, Reverse Key) [Table 2] (A307, F468, F593, SAE J 429)

Screw Thread d	5/16 3/8 7/16 1/2 9/16 (5/8) (3/4)
PP UNC ds max min dk max min k1 max min k max min	18 16 14 13 12 11 10 0.312 0.375 0.438 0.500 0.592 0.657 0.782 0.299 0.360 0.421 0.483 0.544 0.606 0.729 0.592 0.661 0.776 0.892 1.021 1.121 1.277 0.546 0.603 0.709 0.814 0.938 1.028 1.184 0.200 0.202 0.242 0.282 0.336 0.363 0.390 0.185 0.187 0.227 0.267 0.321 0.348 0.375 0.233 0.239 0.282 0.328 0.383 0.414 0.440 0.208 0.208 0.246 0.286 0.338 0.364 0.390

ANSI/ASME B 18.9 - 2007 Regular Head Plow Bolts（Square Head,Countersunk)

ANSI/ASME B 18.9 - 2012 Clipped Head Plow Bolts [Table 5] (A307, F468, F593, SAE J 429)