A 30 mm socket is roughly equivalent to 1-3/16 inches.

• Conversion: 30 mm ≈ 1.18 inches, while 1-3/16 in. is 1.1875 in. (≈30.16 mm).
• Fit note: A 1-3/16 in. socket can feel close on a 30 mm fastener, but it isn’t exact. Using the precise size can help reduce slippage, especially on stubborn or worn nuts.
• Tip: Measure the nut across the flats (A/F) to confirm size.
• Also consider the socket style you need (6-point or 12-point, deep or shallow) and the drive size that matches your tool.

“30 mm” refers to the opening measured across the flats of the hex fastener, not the socket’s outer dimensions or length.

• Opening size: Fits fasteners with a 30 mm A/F hex (or spline design labeled 30 mm).
• Lengths vary: Available in shallow, deep, and extra-deep to reach recessed nuts.
• Drive sizes: Commonly 1/2 in. drive, but 3/4 in. and 1 in. drive options also exist.
• Point styles: Offered in 6-point and 12-point.
• Tool type: Impact-rated versions are designed for impact tools; chrome versions are typically for hand use.

It fits hex nuts or bolt heads that measure 30 mm across the flats. You’ll often see this size on heavy-duty automotive and equipment hardware, such as axle or hub nuts, but it varies by application.

• Confirm by measuring: Check the fastener across the flats with a caliper or ruler.
• Check specs: Manufacturer service info can list the exact nut size.
• Test gently: A proper fit feels snug, not wobbly or forced.
• Match the style: Use a 6-point for high-torque situations or a 12-point where alignment is tight.

They’re close, but not the same size.

• Conversions: 32 mm ≈ 1.26 in.; 1-1/4 in. = 31.75 mm.
• Difference: About 0.25 mm separates them, which can feel loose or tight depending on the fastener.
• Best practice: Use the exact socket size marked for your nut or bolt to help reduce rounding.
• Tool note: If you’re using impact tools, choose an impact-rated socket; chrome sockets are typically not intended for impact use.
• When unsure, measure across the flats or consult the equipment’s service information.

Choose based on how and where you’ll use it.

• Deep: Helpful for tall nuts, long studs, and recessed hardware (like some axle or hub nuts). Offers extra reach.
• Shallow: Better for tight spaces and can provide a more compact, rigid setup.
• Point count: 6-point is often preferred for higher torque; 12-point can help with alignment in limited access.
• Drive and tool: Match your ratchet/impact (e.g., 1/2 in. drive). Impact-rated sockets are designed for impact tools; chrome is typically for hand tools.
• Check product details for length, point style, and drive to align with your task.