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BAG OF 32 EA - BHCS 5/16 - 18 X 5/8" GRADE 8/10.9 BLACK ZINC - Spirit of 1876Xtrusion OverlandBAG OF 32 EA - BHCS 5/16 - 18 X 5/8" GRADE 8/10.9 BLACK ZINC - Spirit of 1876Xtrusion Overland
$16.00

Replacement button head cap screws — a bulk bag of 32, sized 5/16"-18 x 5/8". These high-strength Grade 8 / 10.9 black zinc bolts are the same hardware we ship with our XTR bed racks and MOLLE accessories. The 32-count bag is the value pick for full builds, multi-panel MOLLE setups, or keeping spares on hand.

  • Quantity: 32 screws per bag
  • Type: Button Head Cap Screw (BHCS), socket / hex drive
  • Thread: 5/16"-18 (coarse)
  • Length: 5/8"
  • Grade: Grade 8 / 10.9 (high tensile strength)
  • Finish: Black zinc — corrosion-resistant and matte black to match your rack

The low-profile button head sits flush and clean against T-slot extrusion, MOLLE panels, and bracket hardware. Pairs with our 5/16-18 drop-in T-nuts for fast, no-weld mounting anywhere along the rack.

Common uses: full bed rack assembly, multi-panel MOLLE mounting, accessory and bracket installs, and any 5/16-18 T-slot or threaded application that needs a strong, clean-looking fastener.

Need fewer? Grab the 16-count bag instead. Questions about fitment or larger bulk quantities? Email support@xtrusiondesigns.com.

What people are saying about us

Testimonials

Angela M

Can’t say enough good things about Mike and the Spirit team. Definitely the go-to shop for all things camp / overland / outdoor. He helped me figure out what roof rack would work best for my 4Runner, and the rooftop tent + awning that fit my budget and what I was looking for. Don’t miss out on their camp accessories and gear either — 5 stars all around.

Thomas H.

Mike over at Spirit is an absolute legend in the overlanding space here in Colorado. He’s been in the industry long enough to easily identify a fad versus a trend and is passionate about quality products that will make your time outdoors better. He knows the products he sells and is committed to finding the perfect fit for your adventure rig. I can’t recommend him and his team enough.

Alex M.

Mike and Spirit of 1876 are top notch, he's the most knowledgeable person I've found in the overland/accessory market and he'll tell you what products are worth your while, and which are not based on real world experience... He sells only the best products, and doesn't sell what's popular just because XYZ company put a bunch of money into marketing. Trust Mike with your next purchase of anything in the overland accessory field, he won't steer you wrong.