Find your drill or hardware thread size. The recommended close/free fit will be the size of your hole. Use the free size for a looser fit and close for a tight fit.
If you are countersinking, the close/free fit sizes will apply to your minor diameter.
For flush surfaces, there’s countersinking. Increase the lifespan of your part and preserve your hardware from long-term wear.
Let SendCutSend and PEM fasteners set your parts up for success with self-clinching nuts, studs, and stand-offs.
We proudly use hardware by PEM
|Thread Size||4-40 x .250″|
|Hole size in sheet (+0.003/-.0.000)||.168″|
|Minimum sheet thickness||0.040″|
|Maximum sheet thickness||.125″|
|Minimum distance hole C/L to edge||0.230″|
|When determining the distance between two or more fasteners, you can calculate the distance by the formula, C/L to edge + 1/2 the diameter of the second mounting hole.||.345″|
|Recommended panel material||Steel/Aluminum|
|Aluminum material ranges (5052, 6061, 7075)||0.040″-0.125″|
|Steel material ranges (CRS, HRPO, HR)||0.048″-0.119″|