My friend owns a Mauser 98 and just put it in a new synthetic stock and the rear tang bolt is too short and only grabs by a thread or less. It may have been ground to fit the previous stock (non military type stock) so we need to buy another rear tang bolt. The head of the bolt is that funny shape that uses the small screw to prevent it from coming loose. Threads are metric I believe. If you have one please respond or email me at firstname.lastname@example.org. I will try to get an exact length of our bolt to make sure we get a longer one. Thanks.