Spare O-ring for Sofirn IF25a

[dimwit75]

I'm in a bit of a pickle. I misplaced the extra o ring that came with my if25a flashlight and the one on the light got damaged when I used an incompatible thread lubricant. Now I can't use it without risking water damage. Does anyone have any idea what size o ring I need and where I can order some? I really like this light and I don't want to feel like I have to tip toe around using it in wet conditions.

 

[DaveTheDude]

Have you tried asking Sofirn's customer service for the size O-ring they used? Once you learn that, there are literally dozens of online vendors who can provide a package of ten for $5 or thereabouts. You might also consider just measuring the broken ring with a caliper and ordering suitable replacements online. Just a thought...

 

[bigburly912]

You could go to any box store and buy any oring kit and find one that will fit. No need to overthink an oring. Or like above contact sofirn. I'd just go to Napa and get one of the clear box kits that has every size imaginable and get one that fits. You'll need them at some point in the future anyway.

• Length: 10.64 cm / 4.19 inches
• Head diameter: 3.5 cm / 1.38 inches
• Body diameter: 3.1 cm / 1.22 inches at its widest, 2.54 cm / 1.00 inches at its narrowest
• Inner body diameter: 2.2 cm / 0.87 inches

 

[DRW]

If you don't have an old o ring to measure. Take measurements of the groove(area) the o ring fits into.

O rings are a commodity product. Charts are here https://www.allorings.com/o-ring-size-charts-index