RETAINING RING This RFQ was sourced on www.MFG.com in USA for Hardening .845" OD X .075 FIN GRD-.083 RGH TURN. Made from 4340. Buyer Information Industry City/Region Long Island City, New York Country USA RFQ RFQ Number 337125 Material Alloy Steel Technical Specifications Category Hardening Dimensions Get quotes online for manufacturing services at MFG.com from machine shops, fabricators, job shops and contract manufacturers. MFG.com connects buyers and suppliers when the buyer has a need and the supplier has the right expertise and capacity. MFG.com analyzes all engineered parts and RFQs for improved manufacturability and to ensure quality and a quick quoting experience. Hardening: Hardening steel increases its strength and durability. A key element in the hardness level achieved is the steel's carbon content. Some alloys must be carbon-enriched prior to hardening. Hardening of steel is achieved by heating it and then rapidly cooling it by quenching the steel in either water, salt water, oil, or a polymer bath.