M6 Metric Thread
Direct Answer
M6 is an ISO metric machine screw thread with a nominal major diameter of 6.0 mm and a standard coarse pitch of 1.00 mm. Requiring a 5.00 mm tap drill, it is the global standard for EIA-310 19-inch datacenter server rack cage nuts, VESA MIS-E 200×200 mm TV mounts, and automotive body panels.
Source: ISO 68-1 / ISO 261 / DIN 13-1 / EIA-310-D
Specs
| Nominal Major Diameter | 6.00 mm |
| Standard Coarse Pitch | 1.00 mm |
| Fine Pitch (Optional) | 0.75 mm |
| Tap Drill Diameter | 5.00 mm (75% thread engagement) |
| Minor Diameter (Internal) | 4.917 mm |
| Tensile Stress Area | 20.1 mm² |
| Common Drive Size | 10mm Hex / 5.0mm Allen / T30 |
Datacenter Server Racks and Cage Nuts
In enterprise IT datacenters conforming to EIA-310, square-hole 19-inch equipment racks utilize snap-in M6 cage nuts and M6 pan-head screws with plastic nylon washers to mount enterprise servers, switch rails, and UPS battery enclosures.
Automotive Body Panels and VESA MIS-E
M6 bolts with integrated 10 mm hex flange heads are universally used across European, Japanese, and American automobiles for fender mounting, engine intake manifolds, and interior brackets. In audiovisual gear, M6 is the mandated screw size for VESA MIS-E (200×200 mm) television wall mounts.