MICRO PLASTICS 13SP010 Round Spacer, Nylon, #4, 3/8 L, Pk100. More details: Round Spacer, Clear Hole, Nylon, Screw Size #4, Inside Dia 0.115 In, Outside Dia 3/16 In, Length 3/8 In, ID Tolerance +/-0.005 In, OD Tolerance +/-0.015 In, Length Tolerance +/-0.005 In, Temp Range 185 F, Color Natural, Package 100