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115 Thread Proper thickness Proper coating range Non-coating With sealant range For Pneumatic Piping/Fittings & Tubing Prior to Use Fittings with Sealant Seal material (fluororesin) is coated on the thread part with the proper thickness and range, that reduces the piping work, such as coating the seal on the thread. 45° Counterbore diameter oD3 Seal bearing surface diameter oD2 Rz 25 (Sealing face) Chamfer dimension oD1 Female thread inclination angle: 1° or less Female Thread Conditions Applicable to Face Seal 1. Surface roughness of bearing surface: Rz 25 or less 2. Chamfer dimension: oD1, Seal bearing surface diameter: oD2 (Refer to the table below.) 3. Female thread inclination angle: 1° or less 4. Counterbore diameter when the female thread is counterbored.: oD3 ・ Models with width across flats: Body width across flats x 1.1 or more ・ Models other than hexagon (Hexagon socket head male connector etc.): Body dimensions + 0.2 mm or more * The width across flats and the body dimensions differ depending on the model even when the same thread size is used. Refer to the dimensions in the catalog. 5. If oil content or sealant is sticking to the female thread, this may cause damage of the product. Remove it before piping. Table 1 Precautions For products that do not satisfy the female thread conditions shown above and the piping with a piping pitch narrower than the product dimension, use the conventional sealant type. * The rubber parts of the face seal cannot be replaced. * The rubber parts of the face seal may fall off by the air blow and they cannot be mounted again. Be careful not to perform the air blow. Connection thread size Chamfer dimension oD1 mm Seal bearing surface diameter oD2 mm R1/8 10.2 to 10.4 12 or more R1/4 13.6 to 13.8 17 or more R3/8 17.1 to 17.3 21 or more R1/2 21.4 to 21.6 27 or more NPT1/16 8.2 to 8.4 11.11 or more NPT1/8 10.5 to 10.7 12.7 or more NPT1/4 14.1 to 14.3 17.46 or more NPT3/8 17.4 to 17.6 22 or more NPT1/2 21.7 to 21.9 28.7 or more G1/8 10.2 to 10.6 12 or more G1/4 13.6 to 14.0 17 or more G3/8 17.1 to 17.5 21 or more G1/2 21.4 to 21.8 27 or more