The T Series was designed to be used as a cap or a plug and are tapered to fit a wide range of applications to protect from contaminants and debris. These caps/plugs may be used for MIL Std, SAE-type fittings, hydraulic and threaded or non threaded fittings. The tapered design allows the opportunity to cover a vast range of cap or plug applications. Easy to install or remove. : : APPL: , A: 0.116, B: 0.182, C: 0.053, D: 0.12, E: 0.38, F: 0.31, FLEXRIGID: ,.