Amazon.com: Pair of 14K Yellow Gold Earring Back Replacements | Threaded Screw On Screw Off | Quality Die Struck | Post Size .039" Pad Size 5.5 mm | 2 Backs : Clothing, Shoes & Jewelry
3-Pairs14K Gold Plated Screw Earring Backs Replacement for Diamond Earring Studs,925 Sterling Silver Hypoallergenic Locking Screwbacks Fit for Threaded Post (0.032'') - Walmart.com
Single Earring Back Replacement, Threaded 14K Solid White Gold, .032" – Everyday Elegance Jewelry