This page covers M5 Hexalobular Socket Cheese Head Screws to ISO 14580: the full dimensional row, hole and tool sizes, proof-load data and typical applications. All values are taken from the governing standards (ISO 14580 together with ISO 273, ISO 724 and ISO 898-1 where applicable).
M5 Dimensional Row (ISO 14580)
| Size | Pitch P (mm) | a (mm) | b (mm) | Head diameter dk (mm) | dk_mean (mm) | da (mm) | Head height k (mm) | n_min (mm) | r (mm) | t_min (mm) | x (mm) | Length range l (mm) | Reference standard |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M5 | 0.8 | 1.6 | 38.0 | 8.5 | 8.4 | 5.7 | 3.3 | 1.26 | 0.2 | 1.3 | 2.0 | 6~50 | ISO 14580 |
Spanner & Drive for M5 Hexalobular Socket Cheese Head Screws
Drive geometry for M5 Hexalobular Socket Cheese Head Screws is given by the row above; match the tool to the listed values.
Hole Sizes for M5
| Coarse-thread pitch (ISO 724) | 0.8 mm |
|---|---|
| Through-hole / clearance (ISO 273 medium) | 5.5 mm |
| Tapping drill, coarse thread | 4.2 mm |
Tightening Torque for M5
| Class 8.8 (dry, ~µ 0.125) | ≈ 5.9 Nm |
|---|---|
| Class 10.9 (dry, ~µ 0.125) | ≈ 8.7 Nm |
| Class 12.9 (dry, ~µ 0.125) | ≈ 10 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 M5
| Tensile stress area As (ISO 724) | 14.2 mm² |
|---|---|
| Proof load, class 8.8 | 8.2 kN |
| Proof load, class 10.9 | 12 kN |
| Proof load, class 12.9 | 14 kN |
| Min. ultimate tensile load, class 8.8 | 11 kN |
Proof load = tensile stress area × the proof stress Sp of the class, per ISO 898-1 — Sp is a lower figure than the yield stress Rp0.2 and the two are not interchangeable. The stress area is computed from this size's own diameter and pitch, so a fine-pitch designation gives the fine-pitch figure. Design the joint so the working preload stays below the proof load of the class selected.
M5 Hexalobular Socket Cheese Head Screws Weight
A steel M5 hexalobular socket cheese head screws at the listed 650 mm length weighs approximately 290 g each — about 290 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 M5 Hexalobular Socket Cheese Head Screws
- At M5 the joint is sensitive to over-torque — use a torque-limiting driver and check the head doesn't bury into a softer counterpart.
Mating Parts for M5
For M5, pair with a M5 hex nut (ISO 4032 / DIN 934) and, where used, a M5 flat washer (ISO 7089 / DIN 125A) under the head and under the nut.
Custom manufacturing · Made to drawing
Need hexalobular socket cheese head screws in a size this table does not list?
This page covers M5 hexalobular socket cheese head screws. Head form and drive can be specified to the assembly rather than to a standard: a larger bearing face, a security drive, or a socket sized for the tool already on the bench. Made by cold heading or warm forging.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
