1-1/8" → 29mm Metric
The nearest metric equivalent of 1-1/8" is 29mm (0.42mm difference).
Result
Answer
29mm (29mm)
Input Size1-1/8" (28.58mm)
Nearest Metric29mm (29mm)
Difference0.42mm
Second Nearest28mm (28mm, 0.58mm off)
SystemImperial → Metric
A 1-1/8" socket or wrench (28.58mm) is closest to 29mm metric, a difference of 0.42mm. Close enough for most jobs, but use the correct size when precision matters.
Note
Reference value from published fastener data. Always verify with the fastener manufacturer for critical applications.
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Related Sizes
About 1-1/8" Conversion
A 1-1/8" imperial socket or wrench (28.58mm) is closest to 29mm metric, with a difference of 0.42mm. The sizes are close enough for most applications, but always use the correct imperial socket when precision matters. The second-nearest metric size is 28mm (28mm, 0.58mm off). 7/8" SAE bolts. A combination metric and SAE socket set is the best way to handle mixed fasteners without risking damage.