Slotted Round Nut, Small Series manufactured to GB are dimensioned by the size table reproduced on this page. The standard fixes geometry and tolerances only; material and property class are assigned by ISO 898-1/898-2, and surface finish by separate finish standards.
GB — Scope
GB specifies the dimensions and tolerances of slotted round nut, small series — gb/t 810 (series 074). Material, property class, surface finish and packaging are governed by separate documents in the same standards family (for example ISO 898-1 for the mechanical property classes of bolts and screws).
Tolerance & Product Grades
GB, alongside the related GB/T 810 entries on this site, specifies product grades (typically A or B for fine work and C for general engineering) and tolerance classes for the controlling dimensions. Choose the grade against the precision your application requires.
Dimensions Specified by GB
| Size | Pitch (mm) | Outer diameter D (mm) | Nut height m (mm) | Slot width (mm) | Slot depth (mm) | Reference standard |
|---|---|---|---|---|---|---|
| M10x1.0 | 1.0 | 18 | 8 | 3 | 2 | GB/T 812 / DIN 1804 |
| M12x1.25 | 1.25 | 22 | 8 | 3 | 2 | GB/T 812 / DIN 1804 |
| M16x1.5 | 1.5 | 28 | 8 | 4 | 2.5 | GB/T 812 / DIN 1804 |
| M20x1.5 | 1.5 | 34 | 10 | 4 | 2.5 | GB/T 812 / DIN 1804 |
| M24x1.5 | 1.5 | 40 | 10 | 5 | 3 | GB/T 812 / DIN 1804 |
| M30x1.5 | 1.5 | 48 | 12 | 5 | 3 | GB/T 812 / DIN 1804 |
| M36x1.5 | 1.5 | 58 | 12 | 6 | 3 | GB/T 812 / DIN 1804 |
| M48x1.5 | 1.5 | 72 | 15 | 6 | 4 | GB/T 812 / DIN 1804 |
| M60x2.0 | 2.0 | 90 | 18 | 7 | 4 | GB/T 812 / DIN 1804 |
| M80x2.0 | 2.0 | 115 | 20 | 8 | 5 | GB/T 812 / DIN 1804 |
| M100x2.0 | 2.0 | 140 | 22 | 10 | 5 | GB/T 812 / DIN 1804 |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Slotted Round Nut, Small Series — GB/T 810 (Series 074) page. Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
Companion Standards
GB controls only the geometry of slotted round nut, small series — gb/t 810 (series 074). The mechanical strength is set by ISO 898-1 (bolts and screws) or ISO 898-2 (nuts); the surface finish is governed by separate finish standards (e.g. ISO 4042 for electroplating). For corrosion testing, the relevant document is ISO 9227 (neutral salt spray).