Hex Lag Screws
Hex bolts (six sided heads) are the industry standard for fasteners with forged heads. ASTM A307 grade A bolts, all SAE hex bolts, and several other common specifications require a standard (finished) hex head. For specifications such as A307 grade B, A325 and A490 that require a heavy hex pattern, refer to dimensional tolerances for heavy hex bolts or structural bolts.
Portland Bolt manufactures lag screws from 1/2" diameter through 1-1/2" diameter in most ASTM, AASHTO, and SAE specifications. Special tooling can be created to produce nonstandard head dimensions or bolt heads with your company’s name and/or logo.
One should consider longer than standard thread lengths for lag screws which are extremely long. Unless otherwise specified, Portland Bolt manufactures nonstandard lag screw with a thread length of one-half the bolt length plus 1/2" regardless of the length of the bolt. Unless otherwise specified, nonstandard lag screws manufactured by Portland Bolt will possess a semi-cone point rather than a gimlet or cone point. A full point is unnecessary since a pilot hole nearly as large as the root diameter of the lag screw will need to be drilled prior to installation. Additionally, a gimlet point is designed for small diameter screws so they can be installed without a pilot hole. Lag screws in diameters listed in the above table do not require a gimlet point since too much torque would be required to install the large screws without drilling a pilot hole first. Without a pilot hole, the heads of the screws will often break before the lag is properly installed.
Diameters: 1/2" - 3/4"
Lengths: 18" maximum
Finish: Black and hot-dip galvanized
STANDARD THREAD LENGTH
The minimum thread length shall be equal to one-half the nominal screw length plus 1/2" or 6”, whichever is less.
Note: Hex lag screws larger than 3/4" in diameter and all square lag screws are rarely available in the marketplace as a stock item.
|Body Diameter||Width Across|
Dimensions per ASME B18.2.1 1996