5/16" x 4" Hex Bolt

Category: Hardware & Fasteners

SKU: MF0040

$0.89

In Stock · Midwest Builder & Supply — Iowa & Missouri

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Product Description

5/16" x 4" hex head bolt (5/16-18 UNC coarse thread) — a standard hex‑head cap screw available in zinc‑plated/galvanized carbon steel and stainless grades, with a 4.00" length under the head and typical across‑flats ≈1/2" for wrenching. Use with the appropriate 5/16‑18 nut and washers (flat + lock or spring washer) for secure assemblies. Common catalog options include Grade 5 (medium‑strength carbon steel, zinc plated), Grade 8 (alloy steel, higher tensile strength), and 18‑8/316 stainless for corrosion resistance; lengths, plating/finish, and pack sizes (single, 15/box, 25/box, etc.) vary by supplier. (Product matches standard ASME B18.2.1 / SAE J429 dimensional and material conventions cited below.)