3/8-16 Hex Nylon Insert Lock Nuts NE series 18-8 Stainless Steel. These are also available by the piece at our web site. We also carry screws and washers to match. All items are packaged in heavy duty ziptop bags and well labeled, perfect size for bin restocking! We carry 1000's of other fasteners in stock for immediate shipment. Larger quantities are available. We have over 50 years of experience serving Metro Detroit. Send us your requirements. For prompt Quotations, E-mail; sales at americanintegratedsupply dot com or visit us at; www dot americanintegratedsupply dot com