BS EN ISO 23429 pdf download Gauging of hexagon sockets
This International Standard specifies gauges for hexagon sockets with tolerances as specified in ISO 4759-1.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 4759-1, Tolerances for fasteners — Part 1: Bolts, screws, studs and nuts — Product grades A, B and C
For gauge dimensions see Figure 1 and Table 2.
For design rules for gauge dimensions see Table 1.
EXAMPLE A gauge for a hexagon socket with a width across flats of 10 mm is designated as follows:
Gauge ISO 23429 – 10