Calcgen - Bolt Torque Calculation

Bolt diameter 1/4 inch and larger (Thread major diameter in inches and decimals)	Bolt Dia.	inch
Bolt lubricant or coating friction coefficient This information is generally supplied by lubricant manufacturer API Recognizes: Enter 0.13 for uncoated bolts using API RP 5A3 / ISO 13678 thread compound OR 0.07 for Fluoropolymer (Teflon, Xylan, or SermaGard) coating.	Coefficient of Friction
Bolt Yeild Strength 105000 for ASTM A193 Gr. B7 or ASTM A320 Gr. L7 standard bolting 95000 for ASTM A193 Gr. B7 bolts larger than 2.5" 80000 for ASTM A193 Gr. B7M or ASTM A320 Gr. L7M Modified bolting up to 4"	Bolt Yield Strength	psi
Bolt Percent Yield 50% specified by API 6A. 70% specified by API 17D.	Percent Yield	%

Note: This tool does not account for all possible combinations of loading. An engineering judgement is needed to use this number in design.

Values presented on SI Units are hard conversion of the results, so these values may not match exactly with the published values of API 6A