3/4" knurled brass lock nut (with 3/8" threaded hole) used primarily in assembling lamps- works with standard 1/8 IPS. It is polished and lacquered. We sell in lots of 100 for less, but you'd need to buy from that listing in our store. Combine shipping with other items and save freight. $1 each. Shipping is $3.53 plus $.07 for each additional lot.Combined shipping- to get cheapest shipping costs (when buying different items) please buywhat you need (WITHOUT SHOPPING CART) and “request invoice” (BEFORE YOU PAY) so we can send invoice with lower shipping costs. SHOPPING CART DOES NOT SEEM TO WORK FOR COMBINED SHIPPING.