non-threaded / threaded RCL Series Caps for Long-Threaded Connectors RCL Series long-threaded connecters are ideal for protecting threaded or smooth cylindrical surfaces. The connectors were originally designed for use on hydraulic double-threaded bulkhead fittings, but are especially suitable where greater longitudinal protection is required. Material: Low-Density Polyethylene Color: Red ASC Series Threaded Aluminum Caps for Threaded Flared Fittings ASC Series threaded aluminum caps for threaded flared fittings are designed with a nose-section that forms a low-pressure seal. * Optional sealing discs (ASC-DN Series) for positive seal available in Neoprene, Butyl and Buna N Rubber Material: 3003-0 Aluminum Alloy Color: Silver Applicable Specs: NAS 835 66 A B OPTIONAL SEALING DISC * For other material and color options, contact customer service.