Bolt Size Chart With Spanner Size, Bolt Size Chart India, Bolt Size Chart Inches and MM, Fastener Size Chart, Thread Fasteners Size Chart, Fasteners Size Chart In Mm.

Fasteners Size

Nominal Size Bolt Diameter
‘D’
Across Flats
‘A’
Across Corners ‘B’ Head Height
‘C’
Thread Length ‘L’ Transition Length ‘Y’
Max (in) Min (in) Nominal (in) Max (in) Min (in) Max (in) Min (in) Nominal (in) Max (in) Min (in) ≤6 in >6 in Max (in)
1/4 0.25 0.245 7/16 0.438 0.428 0.505 0.488 5/32 0.163 0.15 0.75 1 0.25
5/16 0.3125 0.3065 1/2 0.5 0.489 0.577 0.557 13/64 0.211 0.195 0.875 1.125 0.278
3/8 0.375 0.369 9/16 0.562 0.551 0.65 0.628 15/64 0.243 0.226 1 1.25 0.312
7/16 0.4375 0.4305 5/8 0.625 0.612 0.722 0.698 9/32 0.291 0.272 1.125 1.375 0.357
1/2 0.5 0.493 3/4 0.75 0.736 0.866 0.84 5/16 0.323 0.302 1.25 1.5 0.385
9/16 0.5625 0.5545 13/16 0.812 0.798 0.938 0.91 23/64 0.371 0.348 1.375 1.625 0.417
5/8 0.625 0.617 15/16 0.938 0.922 1.083 1.051 25/64 0.403 0.378 1.5 1.75 0.455
3/4 0.75 0.741 1-1/8 1.125 1.1 1.299 1.254 15/32 0.483 0.455 1.75 2 0.5
7/8 0.875 0.866 1-5/16 1.312 1.285 1.516 1.465 35/64 0.563 0.531 2 2.25 0.556
1 1 0.99 1-1/2 1.5 1.469 1.732 1.675 39/64 0.627 0.591 2.25 2.5 0.625
1-1/8 1.125 1.114 1-11/16 1.688 1.631 1.949 1.859 11/16 0.718 0.658 2.5 2.75 0.714
1-1/4 1.25 1.239 1-7/8 1.875 1.812 2.165 2.066 25/32 0.813 0.749 2.75 3 0.714
1-3/8 1.375 1.363 2-1/16 2.062 1.994 2.382 2.273 27/32 0.878 0.81 3 3.25 0.833
1-1/2 1.5 1.488 2-1/4 2.25 2.175 2.598 2.48 1-5/16 0.974 0.902 3.25 3.5 0.833
1-3/4 1.75 1.738 2-5/8 2.625 2.538 3.031 2.89 1-3/32 1.134 1.054 3.75 4 1
2 2 1.988 3 3 2.9 3.464 3.306 1-7/32 1.263 1.175 4.25 4.5 1.111
2-1/4 2.25 2.238 3-3/8 3.375 3.262 3.897 3.719 1-3/8 1.423 1.327 4.75 5 1.111
2-1/2 2.5 2.488 3-3/4 3.75 3.625 4.33 4.133 1-17/32 1.583 1.479 5.25 5.5 1.25
2-3/4 2.75 2.738 4-1/8 4.125 3.988 4.763 4.546 1-11/16 1.744 1.632 5.75 6 1.25
3 3 2.988 4-1/2 4.5 4.35 5.196 4.959 1-7/8 1.935 1.815 6.25 6.5 1.25