This bead sight is for the front of a shotgun barrel. The bead is .175" with a 3 x 56 thread.

Doing some research I found that the following shotguns have a 3 x 56 thread: Winchester models: Super X1, 1200, 1300, 1400, 1500, SX2, 120, 12, 10, 23. And these Browning shotguns: 12, BT-99, BT-100, Citori, Superposed, B-80. H&R Shotgun models Survivor, Pardner, Tamer and Topper in .410, 20 and 12 gauge. These threads might fit other shotguns also but this is what I have found. 

Condition: New.

My guarantee: Your happiness is guaranteed or your money back.

My Stock number: SN2313 9/14/23

Thanks for looking and happy e-bay shopping.

Shipping and Handling: USA - Please use calculator. Do to the fact that USPS is losing about 2 out of 5 First Class Mailings I mail out on screws and sights I am now forced to charge a higher shipping fee so that the items are tracked and insured. I myself have been paying for lost items out of my pocket, no questions asked.