| Nominal Size or Basic Screw Diameter | Head Diameter |
Head Height | Protrusion Gage Diameter | Protrusion | Hexagon Socket Size | Key Engagement | Fillet Transition Diameter | Length, Overall | |||
| Theo. Sharp Max | Abs. Min | Ref | Max | Min | Max | Min | Nom | Min | Max | ||
| 7/16 (0.4375) | 0.844 | 0.781 | 0.234 | 0.690 | 0.689 | 0.084 | 0.071 | 1/4 (0.250) | 0.159 | 0.468 | 1 |
| SEE NOTES 1 | 3 | 4 | 5 | 5 | 18 | 13 | 6, 7, 8 | ||||
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/.
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