Remington OEM Stock bolt. 10.5" fit all Standard Remington stocks. 8.5" fits 20ga Jr. 12" LOP stock. The 10.5" is part F402630 , 8.5" is part F202631
You get the stock bolt and both factory washers. The Large washer is has two small ears sticking up. When using for a wood stock those ears go towards the stock as they will bite in. When using for a synthetic stock those ears go away from the stock towards the rear of stock. When installing a stock with a new stock bolt always hand screw the stock bolt into the receiver stud to check that the threads on the receiver stud and bolt are good. Also snug when installing the stock snug the bolt down and do not over-tighten as the large washer and included lock washer with secure the stock. However once the bolt is about to become tight, check the fit at the point where the stock meets the reciever to ensure it is lined up. You may want to hold the stock at that point as you snug down the stock bolt to ensure the stock does not move. Also, use a stock bearing plate at for wood stocks but not synthetic stock. The wood stocks I sell come with that plate.