Imperial 20268 USS Hex Head Cap Screw

Highlights:

• Size: 3/4X3-1/4
• Thread pitch: 3/4-10 UNC
• Conforms to SAE Grade 5 physical and mechanical specifications
• Zinc plated for corrosion resistance

Technical Data:

• Material and Mechanical Properties of SAE J429
• Dimensions: ANSI/ASME B18.2.1 Hex Head Cap Screws
• Tensile: 1/4″ – 1″ Nominal Diameter 120,000 psi (minimum) over 1″ Nominal Diameter 105,000 psi (minimum)
• Proof Load: 1/4″ – 1″ Nominal Diameter 85,000 psi; over 1″ Nominal Diameter 74,000 psi
• Threads: Radius Root Class 2A to ANSI/ASME B1.1
• Hardness: 1/4″ – 1″ Nominal Diameter Rockwell C25-C34; over 1″ Nominal Diameter C19-C30
• Decarburation: SAE J121
• Discontinuities: SAE J1061

?Rule of thumb to figure bolt thread length:

• For bolts under 6″: Twice the bolt diameter plus a 1/4″
• For bolts over 6″: Twice the bolt diameter plus a 1/2″
• This gives you the approximate bolt thread length available