M30 Nylon Insert Hex Lock Nut are manufactured to GB/T 889 / ISO 7040 with a coarse thread pitch of 3.5 mm. This page lists the controlling dimensions for the M30 size — head geometry, width across flats, matching spanner size — together with the clearance hole, tapping drill and tightening torque used at assembly.
M30 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 |
|---|---|---|---|---|---|
| M30 | 3.5 | 46.0 | 50.85 | 25.0 | ISO 7040 / DIN 985 |
Spanner & Drive for M30 Nylon Insert Hex Lock Nut — GB/T 889 / ISO 7040 (Series 078)
Drive geometry for M30 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 M30 Nylon Insert Hex Lock Nut — GB/T 889 / ISO 7040 (Series 078)
M30 Nylon Insert Hex Lock Nut — GB/T 889 / ISO 7040 (Series 078) are commonly specified for structural joints, flange connections and heavy equipment foundations.
Installation Tips for M30 Nylon Insert Hex Lock Nut — GB/T 889 / ISO 7040 (Series 078)
- At M30 the stretch in the bolt becomes the controlling factor — for critical joints, use angle-controlled or stretch-controlled tightening instead of pure torque.
Mating Parts for M30
Pair M30 with the matching M30 bolt or screw, plus a M30 flat washer where required to distribute load on softer materials.