GB/T 27-2013Hexagon fit shank bolts (English PDF)

1 Scope

This standard specifies the thread size is M6 ~ M48, product grade A and B grade hex head bolts reinforcing rods.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein

Member. For undated references, the latest edition (including any amendments) applies to this document.

GB/T 90.1 Fasteners acceptance inspection

GB/T 90.2 Fasteners marking and packaging

GB/T 196 common thread basic size

GB/T 197 common thread tolerance

GB/T 1237 marking method fasteners

GB/T 3098.1 Mechanical properties of fasteners Bolts, screws and studs

GB/T 3103.1 Tolerances for fasteners - Bolts, screws, studs and nuts

GB/T 5276 Fasteners Bolts, screws, studs and nuts - Symbols and designations size

GB/T 5779.1 Fasteners - Surface discontinuities - Bolts, screws and studs for general requirements

GB/T 16938 Fasteners Bolts, screws, studs and nuts conditions

3 Dimensions

Type dimensions shown in Figure 1, the preferred specifications and dimensions are shown in Table 1, the non-preferred specifications and dimensions are shown in Table 2.

Size code labeling and methods in line with GB/T 5276.

Note. non-threaded portion of the rod diameter (ds) the end of the 45 ° chamfer according to the requirements of the manufacturing process, allowing greater than 45 ° is made, less than 1.5P (Coarse pitch) of the neck.

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