#4-40 x 1-7/16" Aluminum Hex Standoffs Installation Guide

Quick answer

To install #4-40 x 1-7/16" aluminum hex standoffs, first prepare the mounting surface, then hand-thread the standoff into the tapped hole, and finally secure your circuit board or panel with a #4-40 screw—avoid over-torquing the aluminum threads.

Installation steps

1. Prepare the mounting surface: Clean the panel or chassis where the standoff will be installed. Ensure the tapped hole is free of debris and that the thread size matches #4-40. Use a tap if necessary to clean the threads. Check that the hole depth is at least 1/2" to fully engage the standoff threads.
2. Hand-thread the standoff: Insert the #4-40 x 1-7/16" aluminum hex standoff into the tapped hole. Turn it clockwise by hand until snug. Do not use a tool to tighten—hand-tight only. Over-torquing can strip the soft aluminum threads. If resistance increases before full insertion, back out and inspect for cross-threading.
3. Secure the board or panel: Place your circuit board or panel over the installed standoff. Use a #4-40 screw (not included) to fasten the board to the standoff. Tighten the screw with a screwdriver until the board is held firmly, then stop. Avoid using a power driver. Apply thread-locking compound if the assembly will experience vibration; otherwise, the screw may loosen over time.

Product facts

• 8227-A-0440 | #4-40 X 1-7/16" Amatom Hex Standoffs | Aluminum (50 / Pkg.): These #4-40 x 1-7/16" hex standoffs are manufactured from Aluminum and are well suited to spacing and mounting circuit boards and panels. Aluminum provides a good balance of strength and weight for electronic assemblies, but its softness means you must avoid over-tightening to prevent thread damage.