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- Size: 1/2X4-1/2"
- Thread pitch: 1/2-20 UNF
- Material: Medium Carbon Alloy Steel
- Finish: Zinc Yellow
- 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 plated fasteners
- Tensile: 150,000 psiminimum
- Hardness: Rockwell Hardness C33-C39
- Tempering Temperature: 800° F. (minimum)
- Threads: UNRF and UNRC Radius Root Class 2A to ANSI/ASME B1.1
- Decarburization: Meets SAE J121
- Discontinuities: Meets 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