Imperial 17139 Sae Hex Head Cap Screw, Grade 8, 5/16×5 Sale In China

Highlights:

• Size: 5/16X5 
• Thread pitch: 5/16-24 UNF
• For your toughest fastening applications, use Grade 8 fasteners every time
• Grade 8 Cap Screws comply with SAE J429, ANSI/ASME B18.2.1 hex cap screws
• Imperial’s zinc; yellow dichromate plating provides the extra corrosion protection not found in regular zinc plating
• For maximum holding power, always use a balanced assembly of Grade 8 components; cap screw, hex nut, flat washer, lock washer

Technical data:

• Tensile: 150,000 psi minimum
• Material: Medium Carbon Alloy Steel
• Decarburization: Meets SAE J121
• Hardness: Rockwell Hardness C33-C39
• Discontinuities: Meets SAE J106133-C39
• Tempering Temperature: 800° F. (minimum)
• Finish: Zinc; Yellow Dichromate ASTM B633, Type II SC1
• Threads: UNRF and UNRC Radius Root Class 2A to ANSI/ASME B1.1

Rule of thumb to figure bolt thread length: