PN#016806  SKU#17142  Nylon Air Brake Tube Fitting, Male Connector. Material: Brass. Pipe Size: 3/8″. Tube Size: 5/8″. Designed for use with nylon air brake tubing. DOT Compliant. Meets SAE J246 requirements. Brass construction with internal stainless steel tube supports. Pipe thread sealant featured. This pre-applied sealant offers several benefits: Provides no-leak assembly instantly saves application time and expense. Will not contaminate systems like tape shredding or liquid sealant washout. Can be reused up to five times. Provides excellent thread lubrication to prevent galling.