With this spline

3/8-16 x 2 3/4 Grade 8 Hex Cap Screw Plain Domestic USA (400)

1 1/8 L9 SAE Tension Flatwasher Yellow Zinc Plated Domestic USA (340)

With a 1/4 inch diameter and 8 1/4 inch length

3/8-24 x 3/4 Grade 5 Hex Cap Screw Plain Domestic USA (1100)

1/2-13 x 1 3/4 A325 Type 1 Heavy Hex Bolt Plain - Bulk Keg (1500) Strong-Point® Phillips Bugle Head Self Drilling Drywall Screws Ruspert Coated With this splineThis 1 2 13 x 1 3 4 A325 Type 1 Heavy Hex Bolt Plain comes in a bulk keg of 1500 and is manufactured to ASTM and SAE specifications. Its superior strength and corrosion resistance make it an ideal choice for a range of industrial applications.