CON203-A-SG Wide Mouth Bass 1" sterling and gold-plated finish screw back Concho. All of our screw-back Conchos come with a 4.5mm machine screw.
If your project requires a shorter or longer screw, here's a selection that might fit your needs. Available in our Concho accessory category 2.5mm, 3mm, 5mm, 8mm, 10mm, 13mm, or 15mm lengths.