Parker mid century chair screws

Hi,
I'm in the process of restoring a set of Parker 1960's chairs I recently acquired and I've come across a problem replacing some missing original screws securing the chair back to the legs.
The existing original screws have an 'antique' finish and are a bit unusual. These screws are Phillips head, self-tapping countersunk with a raised/oval head [not a domed head]; measuring 3.5mm [1/8"] x 60mm [2.5"] and the head diameter is 8mm [less than 3/8"].
I can source similar sized countersunk flat head screws, but the head diameter is a bit too large for the countersink in the chair leg.
Does anyone know where I can get replacement screws; I only need 8 screw.
Hope someone out there can help me with this.

Many thanksAttachment 503111Attachment 503112Attachment 503113Attachment 503123

Nice chairs, I have very similar if not the same.

Could one use the larger screws, put them in a drill thread-first and sand the head to size?

The finish looks a lot like "pickling". This makes the metal black with some sort of oxide.

Some of the metal guys on the forum have described this process several times.

I think a couple of the original Parker cabinet makers started a restoration/ repair service in western suburbs Sydney some time ago, if they are still going and you can track them down they may be able to help I will check with a friend who might have used them.

Thanks Rick47, I’ll do a search to see if I can find them. Anything your friend can provide would be appreciated

I had thought of this solution and have it as a last option. I know I’m being a bit anal, but I’d like to use original/reproduction screws, or something more similar then flat heads.

Care to donate some of your screws ����

Graham
The company is Covesmore Solutions in Seven Hills, owned by Tony Parker the son of Jack Parker owner of the original company, I haven't got contact info but you should be able to google them.
Cheers Rick