Product Code:SAE AMSR83248/1 Title:Rubber, Fluorocarbon Elastomer, High Temperature, Fluid and Compression Set Resistant (O-Rings, Class 1, 75 Hardness) Issuing Committee:Ams Ce Elastomers Committee Scope: The purpose of this specification sheet is to set up a standardized part numbering system for o-rings procured to MIL-R-83248, Class 1. Rationale: The purpose of this specification sheet is to set up a standardized part numbering system for o-rings procured to MIL-R-83248, Class 1.Product Code:SAE J678 Title:Speedometers and Tachometers-Automotive (STABILIZED Aug 2011) Issuing Committee:Odometer And Speedometer Standards Scope: This SAE Recommended Practice applies to speedometers, odometers, and speedometer drives typical of passenger vehicles, buses, and trucks used for personal or commercial purposes. The method of determining wheel revolutions per unit distance and overall system design variation are applicable to passenger cars only. Comparable recommendations for trucks and buses are under development. The data of tachometers is applicable to vehicular use, as previously described, and also to stationary and marine engines and special vehicles.