M6 is one of the standard coarse-thread sizes for soft-tip set screws (nylon and brass) under Trade series (soft-tip set screw). The sections below reproduce the dimensional row, list the matching tools and hole sizes, and summarize where this size is normally specified.
M6 Dimensional Row (Trade series (soft-tip set screw))
| Thread size | Tip material | Tip length (mm) | Holding force vs steel point | Max temperature (u00b0C) | Drive | Common length range (mm) | Marks the shaft |
|---|---|---|---|---|---|---|---|
| M6 | Nylon 6/6 | 3.0 | approx. 40% | 100 | Hex socket | 8~30 | No |
Spanner & Drive for M6 Soft-Tip Set Screws (Nylon and Brass)
The hex socket for M6 Soft-Tip Set Screws (Nylon and Brass) is shown in the spec table — use the matching Allen / hex key (an ISO 2936 hex key set covers the full range). A T-handle key gives the most feel when you are judging preload by hand; anything repeated across a batch wants a torque-controlled driver instead.
Hole Sizes for M6
| Coarse-thread pitch (ISO 724) | 1 mm |
|---|---|
| Through-hole / clearance (ISO 273 medium) | 6.6 mm |
| Tapping drill, coarse thread | 5 mm |
Tightening Torque for M6
| Class 8.8 (dry, ~µ 0.125) | ≈ 10 Nm |
|---|---|
| Class 10.9 (dry, ~µ 0.125) | ≈ 14 Nm |
| Class 12.9 (dry, ~µ 0.125) | ≈ 17 Nm |
Indicative dry-joint values. Lubrication can lower the required torque by 15–25%. Always confirm against the joint design, especially when going up a strength class.
Proof Load & Strength for M6
| Tensile stress area As (ISO 898-1) | 20.1 mm² |
|---|---|
| Proof load, class 8.8 | 12 kN |
| Proof load, class 10.9 | 17 kN |
| Proof load, class 12.9 | 19 kN |
| Min. ultimate tensile, class 8.8 | 16 kN |
Proof load = stress area × proof stress per ISO 898-1. Design joints so the working preload stays below the proof load of the selected class.
M6 Soft-Tip Set Screws (Nylon and Brass) Weight
A steel M6 soft-tip set screws (nylon and brass) at the listed 3 mm length weighs approximately 0.7 g each — about 0.7 kg per 1,000 pieces. Stainless A2/A4 weighs roughly the same (density 7.9–8.0 g/cm³).
Actual weight varies slightly with head form, thread and finish; use this figure for freight estimation only.
Installation Tips for M6 Soft-Tip Set Screws (Nylon and Brass)
- Use a quality Allen key fully seated in the socket — partial engagement is the most common cause of stripped sockets at this size.
- For countersunk and button-head variants, chamfer the through-hole to seat the head flush without preloading the head/shank fillet.
Mating Parts for M6
For M6, pair with a M6 hex nut (ISO 4032 / DIN 934) and, where used, a M6 flat washer (ISO 7089 / DIN 125A) under the head and under the nut.
