Surface Discontinuities on Bolts, Screws, and Studs in Fatigue Applications(Cancelled Apr 2012, Superseded by ASTM F788/F788M INCLUDING SUPPLEMENTARY REQUIREMENT S1)
This SAE recommended practice defines, illustrates, and specifies allowable limits for various types of surface discontinuities that may occur or become apparent during the manufacture and processing of bolts, screws, and studs which are primarily intended for use in automotive assemblies subjected to severe dynamic stresses and necessitating use of high strength fasteners having appropriate fatigue-resistant properties. The basic document does not include inspection sampling requirements. It is intended that the purchaser shall specify, in the original inquiry and purchase order, the inspection sampling requirements which the producer must satisfy to demonstrate the acceptability of bolts and screws with respect to surface discontinuities. Appendix A outlines inspection sampling plans applicable when such requirements are not specified by the purchaser in the original injury, purchase order, or in related specifications. When the provisions of this document are specified by the purchaser, the fastener manufacturer must significantly increase production controls including machine set up, blank diameters, die lubrication, in-process inspection requirements, and reduced production rate
The SAE Fasteners Committee has reviewed and compared both SAE J123 and ASTM F788/F788M including Supplementary Requirement S1. It has been determined that there is enough similarity between these two documents that ASTM F788/F788M (including S1 requirements) covers the requirements for automotive assemblies as intended according to SAE J123.
Please note that Supplementary Requirement S1 is intended for use only on fasteners subjected to severe dynamic stresses. When this requirement is specified, the fastener manufacturer must significantly increase production controls including machine set-up, blank diameters, die lubrication, in-process inspection requirements, and reduced production rate.