
| Nominal Size or Basic Screw Diameter | Head Diameter | Head Height | Head Chamfer | Hex Socket Size | Key Engagement | Wall Thickness | Edge of Head Chamfer | Length | ||
| Max | Min | Max | Min | Max | Nom | Min | Min | Max | Under Head | |
| 1-1/2" (1.5000) | 2.250 | 2.224 | 1.500 | 1.485 | 0.176 | 1 (1.000) | 0.745 | 0.570 | 0.020 | 5-1/2 |
| SEE NOTES 1 | 3 | 4 | 20 | 6 | 9, 10, 11 | |||||
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/.