5/16-18 x 5.5" machine Bolts
Great Old-Fashioned Square head Machine Bolts for a much more traditional look. Some of the square head bolts we sell are old stock and finish can vary from flat to glossy.
500 piece discount = 20% off
1000 piece discount = 30% off
- Black Oxide, followed by an appropriate post-treatment, provides limited added corrosion protection to the surface of the metal, prolonging service and increasing the shelf-life of stored parts.
Standard Thread Length - If you have a specific thread length you need please call to verify. The minimum thread length shall be equal to one-half the nominal screw length plus 1/2" or 6”, whichever is less. However some of our stock is truly custom and therefore please call if you need a specific thread length.
|length below head||5.5"|
|finish coating||Black Oxide|