SAE J531_201511 Standard includes complete general and dimensional specifications for those types of pipe, filler, and drain plugs (shown in Figures 1 to 6 and Tables 1 to 4) commonly used in automotive and related industrial applications.
References of SAE J531 standard as follows:
SAE J476 Dryseal Pipe Threads
SAE J846 Coding Systems for Identification of Fluid Conductors and Connectors
ASTM B 117 Method of Salt Spray (Fog) Testing
ISO 9227 Corrosion Tests in Artificial Atmospheres - Salt spray tests
Material and Manufacture
Plugs may be made from low carbon steel, cast iron, malleable iron, brass, bronze, or aluminum alloy as specified by purchaser, by casting, milling from the bar, or upsetting from a grade of material free of defects which will affect their serviceability.
Table 1 - Chamfer dimensions
