5/16"-18 x 4" Square Head Machine Bolt, Reduced Shank, Black Oxide
SKU: 31SQMB400RSBO
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Head/Wrench/8-point Socket size is 1/2"
Shank is 5/16" below the head but then reduces to 0.27"
No Head Marks
The bolt was exactly as described and arrived in a timely manner. Unfortunately, it did not fit the item I needed it for (my measurement was wrong). I did place another order which arrived quickly and was a perfect fit. I would definitely order from this company again.
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