Wrench Size | Hexagon Width Across Flats | Hexagon Width Across Corners | Length of Short Arm | Length of Long Arm | Radius of Bend | Chamfer | Torsional Shear - Ave. | Torque Rating | ||||
Max | Min | Max | Min | Max | Min | Max | Min | Min | Max | (Inch-Pounds) | (Inch Pounds) | |
1/4 (0.250) | 0.2500 | 0.2485 | 0.2845 | 0.2815 | 1.219 | 1.031 | 5.344 | 5.156 | 0.250 | 0.030 | 770.0 | 615.00 |
SEE NOTES | 2 | 1 |
NOTES: |
(1) Ends | (5) Plating |
(2) Rounding of Corner | (6) Product Applicability |
(3) Material | (7) Designation |
(4) For sizes above 1" |
Reprinted from ASME/ANSI B18.3 by permission of The American Society of Mechanical Engineers. All rights reserved. For a full copy of the standards, contact the ASME at http://www.asme.org/codes/.