Bayou City Bolt & Supply Co., Inc. Metric Size - Coarse Thread Bolts Class 10.9

US INCH STANDARDS & METRICS Hex Cap Screws have hexagonal heads and machine threads for use with a nut or in a tapped hole. They are generally used in precise applications such as OEM settings where tight tolerances are required. The most common grades for Inch Standard Hex Cap Screws are 2, 5 and 8. Some of the basic features of a Hex Cap Screws are as follows: Flat washer facing under the head that meets specific tolerances outlined in ASME B18.2.1-1996 Manufactured by a cold-heading process A radius under the head at the shank Tighter tolerances than a standard Hex bolt No seams across any bearing surfaces GOVERNING STANDARDS Inch Standard SAE J429 Mechanical and Material Requirements for Externally Threaded Fasteners - covers Grades 1, 2, 5, 5.2, 8 and 8.2 ASME B18.2.1-1996 Square & Hex Bolts and Screws (Inch Series) specifies Hex Cap Screws that range in size from 0.25-3 in (6.35-76.20 mm) in diameter. ASTM A449 Standard Specification for Quenched and Tempered Steel Bolts and Studs ASTM F593 Standard Specification for Stainless Steel Bolts, Hex Cap Screws, and Studs METRIC STANDARDS SAE J1199 Mechanical and Material Requirements for Metric Externally Threaded Fasteners ASME B18.2.3.1M Metric Hex Cap Screws - This Standard covers the complete general and dimensional data for metric series hex cap screws recognized as American National Standard. DIN 931 Part Thread Hexagon Head Screws DIN 933 Full Thread Hexagon Head Screws ISO 4017 Full Thread Hexagon Head Screws