Calibration of Alloy Steel Bolts

by Richard J. Christopher,
Geoffrey L. Kulak,
John W. Fisher,

Serial Information: Journal of the Structural Division, 1966, Vol. 92, Issue 2, Pg. 19-40

Document Type: Journal Paper


The performance of alloy steel structural bolts when subjected to various conditions of installation and load was determined. The bolts investigated were ASTM A354 Grades BC and BD and ASTM A490. Variables included bolt diameter, grip length, thread length under nut, and thread lubrication. The problems investigated included the behavior of bolts loaded in tension by either direct axial force or by torque, the response of bolts installed by torquing to subsequent application of direct tension, the effect of reinstallation, differences between tests performed in a hydraulic load cell and field behavior of bolts, incremental versus continuous torquing, and the effect of thread lubrication. Conclusions and recommendations are made concerning alloy steel bolts used as structural fasteners.

Subject Headings: Bolts | Hydraulic loads | Load tests | Ultimate strength | Calibration | Steel | Alloys | Structural steel

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