5/16"-18 x 4-1/2" Hex Head Cap Screw Bolts, Stainless Steel 18-8 (Quantity: 200 pcs) Partially Threaded, Coarse Thread, Thread Size: 5/16 Inch, Bolt Length: 4-1/2 Inch

Hex cap screws are often mistakenly called hex bolts, though the main difference is that hex cap screws feature a washer face under the head and a chamfered point, and a hex bolt does not have a washer face or chamfered threads. A hex head cap screw is a six-sided bolt with a trimmed hex head and a washer face on the bearing surface. These stainless steel hex cap screwws meet specific tolerances as described under ASME B18.2.1-1996. Hex cap screws are commonly used in OEM applications where precise tolerances are needed. Hexagon head designed to be driven by a wrench or socket. Called hex cap bolts or hex cap screws. 18-8 Stainless steel hex cap screws offer protection from weather and corrosive environments, Rust resistant in fresh water environments. For salt water environments use the 316 stainless steel version

• Diameter - Thread Pitch: 5/16" - 18 / Length from Under Head: 4-1/2 Inch
• Coarse Thread / Partially Threaded
• 18-8 Stainless steel hex cap screws offer protection from weather and corrosive environments
• Rust resistant in fresh water environments, for salt water environments use the 316 stainless steel version
• Called hex cap bolts or hex cap screws