I picked up another 5 of the new ones yesterday from a bloke who ended up with them from a mower shop that closed down and as Gadge said they don't have the part number on them, but it doesn't matter to me because they don't work, so I pull the seat out and fit a Briggs seat and then make up a needle to suit.At least this way they work, unlike the aftermarket rubbish . The bloke I got the primer caps from had a bag of probably 50 needles and I told him to just throw them in the bin, waste of time even trying them, not worth the fuel you waste trying to get one to work