topic EF-S 17-55 f/2.8 IS USM Screw Missing - part number? in EF & RF Lenses

EF-S 17-55 f/2.8 IS USM Screw Missing - part number?

dnao — Tue, 03 Sep 2024 09:07:19 GMT

Hi all,

I have a EF-S 17-55 f/2.8 IS USM Lens I bought second hand about 12 years ago. It had an issue at the time so I replaced the ribbon cable and it's been fine until recently.

It seems that I should have used loctite on the screws because the one securing the barrel/zoom ring tab has come loose. It's the part that grips the inner barrel to the outer zoom ring. I couldn't find it inside the lens so it seems to be lost. It's about 1.66mm in diameter (including threads) and 2.46mm long (including the head).

Could anyone assist with a part # or source where I can purchase said screw?

Thanks,

Re: EF-S 17-55 f/2.8 IS USM Screw Missing - part number?

Tintype_18 — Tue, 03 Sep 2024 13:40:02 GMT

Loctite or a drop of any two part epoxy will work. Good luck on finding the screw as some products have odd specifications for them.

Re: EF-S 17-55 f/2.8 IS USM Screw Missing - part number?

dnao — Wed, 04 Sep 2024 07:59:38 GMT

I've taken some more measurements of the thread and I'm fairly sure it's a L2.5mm M1.7x0.35mm so I'm going to try to find a generic countersunk replacement.

I can only find 3mm screws though so if that proves too long I might have to try to grind it down.

Re: EF-S 17-55 f/2.8 IS USM Screw Missing - part number?

jrhoffman75 — Wed, 04 Sep 2024 09:54:01 GMT

You could try US Camera-dot-com.