5/16 inch

The head size is 1/2 inch for the 5/16 inch lag bolts. We offer both plain and black oxide finishes. Be sure to call if you need a size we are not offering.

Hex lag bolts, often called a lag screw, are for fastening in wood.  Blacksmiths commonly use them to attach their ironwork in homes and on buildings or structures during installation.

*Note regarding Black Oxide finish* - This finish is *not* weather resistant and *will* rust if exposed to moisture. Please contact us if you have questions regarding exterior applications.

*Note regarding Plain Steel items* - Plain steel products such as wood screws may have surface rust. If this is not acceptable for your application please contact us.

Square Head Lag, 5/16 inch - Plain Finish

Pieh Tool
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Square head lag bolt with a Plain Finish.

Item #: SH0312LP01000, SH0312LP01500, SH0312LP01750, SH0312LP02000, SH0312LP02500

Square Head Lag, 5/16 inch - Black Oxide Finish

Pieh Tool
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Square Head Lag with Black Oxide Finish

Item #: SH0312LB01000, SH0312LB01250, SH0312LB01500, SH0312LB01750, SH0312LB02000, SH0312LB02500, SH0312LB03000, SH0312LB03500, SH0312LB04000, SH0312LB05500