Please fill out the form below for Washer Flat and get a quote for part number HL-21023 ITEM 143 by Atlas Copco Holyoke Inc with NSN 5310012001311 and FSC Name is 5310 Nuts and Washers, please include required quantity along with expected turn around time. Our knowledgeable account manager will reply you shortly. Also check for the related parts for part number HL-21023 ITEM 143. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.