68vitesse Posted February 2, 2021 Report Share Posted February 2, 2021 Anything special about seat belt bolts?, thinking of using black high tensile 8.8 7/16 UNF. Many thanks. Regards Paul. Link to comment Share on other sites More sharing options...
Pete Lewis Posted February 2, 2021 Report Share Posted February 2, 2021 think they tend to have a bigger hex head than a std bolt Pete Link to comment Share on other sites More sharing options...
NonMember Posted February 2, 2021 Report Share Posted February 2, 2021 As Pete says, a bigger head. This is because the belt end has a bigger hole - there's a spacer fitted under it so that it can rotate, and the bolt head clamps down on the spacer but must be large enough to retain the belt end. At a push, I think you could use a washer to achieve the same result? Link to comment Share on other sites More sharing options...
Paul H Posted February 3, 2021 Report Share Posted February 3, 2021 Just checked mine on my Vitesse 11/16 af Paul Link to comment Share on other sites More sharing options...
NonMember Posted February 3, 2021 Report Share Posted February 3, 2021 22 minutes ago, Paul H said: Just checked mine on my Vitesse 11/16 af Sounds right. The standard 7/16" UNF bolts would have 5/8" AF heads but the hole in the seatbelt end is probably 5/8" diameter Link to comment Share on other sites More sharing options...
PeteH Posted February 3, 2021 Report Share Posted February 3, 2021 Whilst I have no physical "evidence" to back this up. The "Propper" bolts may well not be high tensile too?. (I note the OP was suggesting H-T). However most mounting situations would have the Bolts in Shear. H-T bolts are not best known for this, They exhibit a loss of Ductility, for example, and have been known to fail when subjected to (shear) testing?. Pedantry in action, I apreciate?. Link to comment Share on other sites More sharing options...
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