Dimensional and assembly data for M16 Nylon Insert Hex Lock Nut to GB/T 889 / ISO 7040. Includes head size and width across flats, clearance-hole and tapping-drill diameters, tightening torque per property class, and the sizes to step up or down to when the joint requires it.
M16 Dimensional Row (GB/T 889 / ISO 7040)
| Size | Pitch (mm) | Width across flats s (mm) | Width across corners e (mm) | Total height m (mm) | Reference standard |
|---|---|---|---|---|---|
| M16 | 2.0 | 24.0 | 26.75 | 16.0 | ISO 7040 / DIN 985 |
Spanner & Drive for M16 Nylon Insert Hex Lock Nut — GB/T 889 / ISO 7040 (Series 078)
Drive geometry for M16 Nylon Insert Hex Lock Nut — GB/T 889 / ISO 7040 (Series 078) is given by the row above; match the tool to the listed values.
Common Applications for M16 Nylon Insert Hex Lock Nut — GB/T 889 / ISO 7040 (Series 078)
M16 Nylon Insert Hex Lock Nut — GB/T 889 / ISO 7040 (Series 078) are commonly specified for medium-duty structural joints and motor / chassis mounting.
Mating Parts for M16
Pair M16 with the matching M16 bolt or screw, plus a M16 flat washer where required to distribute load on softer materials.
When to Step Up or Down from M16
When the joint preload approaches the proof load of M16 class 8.8, step up to M20 class 8.8 (or move to M16 class 10.9). When the joint is over-specified, M12 often saves weight and cost without losing the safety margin.