Seat belt bolt,

[Belly]

Looking for the spline size of the bottom bolt on the B pillar not sure if it's M8 or M10.. this has come loose in my daughters mobility van and I need to buy a socket that fits rather than a full set...tia..

 

[Dellmassive]

You need the VW spline bit set, not sure on the size...

Spline Bit Socket Set 10pcs, 1/4", 3/8" & 1/2" Drive Triple Square Bits XZN Spline Sockets M4 - M18, S2 Steel and Chrome Vanadium Steel Made : Amazon.co.uk: DIY & Tools

Free delivery and returns on all eligible orders. Shop Spline Bit Socket Set 10pcs, 1/4", 3/8" & 1/2" Drive Triple Square Bits XZN Spline Sockets M4 - M18, S2 Steel and Chrome Vanadium Steel Made.

amzn.to

 

[BoroBoy]

You need the VW spline bit set, not sure on the size...

Spline Bit Socket Set 10pcs, 1/4", 3/8" & 1/2" Drive Triple Square Bits XZN Spline Sockets M4 - M18, S2 Steel and Chrome Vanadium Steel Made : Amazon.co.uk: DIY & Tools

Free delivery and returns on all eligible orders. Shop Spline Bit Socket Set 10pcs, 1/4", 3/8" & 1/2" Drive Triple Square Bits XZN Spline Sockets M4 - M18, S2 Steel and Chrome Vanadium Steel Made.

amzn.to

M10 size fits.

 

[DXX]

Pretty sure if you go to a garage they’ll tighten it on the spot for free.

 

[TeeCeeJay]

If you don't have spline bits, an 8mm hex key works.