PINS This item was sourced on www.MFG.com as one of the items in an RFQ in USA for Hardening We are looking for induction hardening services to support our manufacturing operations. We have many different size pins: 3.5-12.5" Dia and up to 101" long. Average lenght is 24" long. 1/4" CASE DEPTH Please remit your interest in providing the services to our facility. We are located in Illinois. Part Part Number: PINS Material: Material Grade: 4340 Technical Specifications Category:Hardening Dimensions0.0 x 0.0 inch Annual Usage:300.0 The following suppliers (machine shops, fabricators, casters, molders, 3D printing, CNC machining, etc.) provide manufacturing services and are members of the MFG.com community. For more information visit http://www.mfg.com. MFG.com performs a 5-point inspection on all engineered parts and RFQs to ensure quality and enhance your 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.