M5 is one of the standard coarse-thread sizes for hex slotted castle nut (type 1) under GB/T 6180 / ISO 7036. The sections below reproduce the dimensional row, list the matching tools and hole sizes, and summarize where this size is normally specified.
M5 Dimensional Row (GB/T 6180 / ISO 7036)
| Size | Pitch (mm) | Width across flats s (mm) | Width across corners e (mm) | Total height m (mm) | Slot width (mm) | Reference standard |
|---|---|---|---|---|---|---|
| M5 | 0.8 | 8.0 | 8.79 | 6.7 | 1.8 | ISO 7036 / GB/T 6180 |
Spanner & Drive for M5 Hex Slotted Castle Nut (Type 1) — GB/T 6180 / ISO 7036 (Series 049)
Drive geometry for M5 Hex Slotted Castle Nut (Type 1) — GB/T 6180 / ISO 7036 (Series 049) is given by the row above; match the tool to the listed values.
Common Applications for M5 Hex Slotted Castle Nut (Type 1) — GB/T 6180 / ISO 7036 (Series 049)
M5 Hex Slotted Castle Nut (Type 1) — GB/T 6180 / ISO 7036 (Series 049) are commonly specified for paired with the same-size screws on PCB hardware, light enclosures and small-scale assemblies.
Installation Tips for M5 Hex Slotted Castle Nut (Type 1) — GB/T 6180 / ISO 7036 (Series 049)
- 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
Pair M5 with the matching M5 bolt or screw, plus a M5 flat washer where required to distribute load on softer materials.