Industrial Fasteners Monel 400 (UNS N04400) Precision Machined Locking Collar / Retaining Ring, Corrosion-Resistant Nickel-Copper Alloy Component Monel 400 (UNS N04400) Precision Machined Threaded Bushing / Insert, Corrosion-Resistant Nickel-Copper Alloy Component Hastelloy C276 Corrosion-Resistant Flange Ring