Turn the large flat sides with a wrench into square holes that stop further rotation. Choose from our selection of grade 8 bolts, including hex head screws, socket head screws, and more. Same and Next Day Delivery.

2023年8月2日 · Grade 8 bolts are made of medium-strength carbon or alloy steel and can be finished in a variety of coatings and platings for added corrosion resistance and lubricity. You can identify a Grade 8 bolt by looking at its head markings. An SAE J429 Grade 8 bolt’s head marking will show six radial lines like this:

A chart to identify bolt grades using bolt grade markings; also provides a strength chart for common grade bolts.

Grade 8 Standard Specification for Carbon and Alloy Steel Nuts for Bolts for High Pressure or High Temperature Service, or both. ASTM A194 specification covers a variety of carbon, alloy, and martensitic stainless steel nuts in the size range 1/4 through 4 …

Tensile Strength: The maximum load in tension (pulling apart) which a material can withstand before breaking or fracturing. Yield Strength: The maximum load at which a material exhibits a specific permanent deformation. Proof Load: An axial tensile load which the product must withstand without evidence of any permanent set.

Grade 8 Hex head bolts. Zinc yellow plated. Made in the USA. Large selection of grade 8 hardware.

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Grade 8 bolts have a hexagonal head for use with a wrench. These bolts are heavy-duty flange fasteners for military, aerospace, or marine metal-to-metal connections. These bolts can withstand high stress and strong load-bearing pressures.

Conquest grade 8 flange bolts are meticulously crafted to meet the rigorous demands of industrial applications. Constructed from premium alloy steel, these bolts feature a unique flange beneath the head, engineered to evenly distribute loads like a washer.