Hex Lag Screws

hex-lag-dim-500

Hex lag screws are used in marine construction involving wood. Lag screws are commonly available as a stock item through 3/4″ diameter. Custom lag screws ranging from 7/8″ diameter through 1-1/2″ diameter in virtually any length can be manufactured. Lag screws are typically hot-dip galvanized mild steel or type 304 or 316 stainless steel. High strength lag screws can be manufactured for special applications.

Click table to show drawinghex-lag
Bolt Diameter D F H Threads Per Inch Thread Dimension
Body Diameter Width Across Flats Head Height Pitch TF TD TR
Max Min Flat At Root Depth of Thread Root Diameter
3/8 0.388 0.360 9/16 1/4 7 0.143 0.062 0.055 0.265
1/2 0.515 0.482 3/4 11/32 6 0.167 0.072 0.064 0.371
5/8 0.642 0.605 15/16 27/64 5 0.200 0.086 0.077 0.471
3/4 0.768 0.729 1-1/8 1/2 4-1/2 0.222 0.096 0.085 0.579
7/8 0.895 0.852 1-5/16 37/64 4 0.250 0.108 0.096 0.683
1 1.022 0.976 1-1/2 43/64 3-1/2 0.286 0.123 0.110 0.780
1-1/8 1.149 1.098 1-11/16 3/4 3-1/4 0.308 0.133 0.119 0.887
1-1/4 1.277 1.223 1-7/8 27/32 3-1/4 0.308 0.133 0.119 1.012
1-3/8 1.404 1.346 2-1/16 29/32 3 0.333 0.143 0.128 1.119
1-1/2 1.531 1.469 2-1/4 1 3 0.333 0.143 0.128 1.244

Dimensions per ASME B18.2.6 2003