This page covers M6 Castellated Hex Nut to GB/T 6180 / ISO 7036: the full dimensional row, hole and tool sizes, proof-load data and typical applications. All values are taken from the governing standards (GB/T 6180 / ISO 7036 together with ISO 273, ISO 724 and ISO 898-1 where applicable).
M6 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 |
|---|---|---|---|---|---|---|
| M6 | 1.0 | 10.0 | 11.05 | 7.7 | 2.0 | ISO 7036 / GB/T 6180 |
Spanner & Drive for M6 Castellated Hex Nut — GB/T 6180 / ISO 7036 (Series 048)
Drive geometry for M6 Castellated Hex Nut — GB/T 6180 / ISO 7036 (Series 048) is given by the row above; match the tool to the listed values.
Common Applications for M6 Castellated Hex Nut — GB/T 6180 / ISO 7036 (Series 048)
M6 Castellated Hex Nut — GB/T 6180 / ISO 7036 (Series 048) are commonly specified for general-purpose joints in machinery, fixturing and equipment frames.
Mating Parts for M6
Pair M6 with the matching M6 bolt or screw, plus a M6 flat washer where required to distribute load on softer materials.
When to Step Up or Down from M6
When the joint preload approaches the proof load of M6 class 8.8, step up to M8 class 8.8 (or move to M6 class 10.9). When the joint is over-specified, M5 often saves weight and cost without losing the safety margin.