GB/T 9074.31-2017Conical spring washers for assemblies (English PDF)

Foreword

This part is one of the national standards for the "fastener assembly" series. The series includes.

---GB/T 9074.1 bolt or screw and flat washer assembly;

---GB/T 9074.2 cross recessed pan head screw and outer serrated lock washer assembly;

---GB/T 9074.3 cross recessed pan head screw and spring washer assembly;

---GB/T 9074.4 cross recessed pan head screw, spring washer and flat washer assembly;

---GB/T 9074.5 cross recessed small pan head screw and flat washer assembly;

---GB/T 9074.7 cross recessed small pan head screw and spring washer assembly;

---GB/T 9074.8 cross recessed small pan head screw, spring washer and flat washer assembly;

---GB/T 9074.9 cross recessed countersunk head screw and tapered lock washer assembly;

---GB/T 9074.10 cross recessed countersunk head screw and tapered lock washer assembly;

---GB/T 9074.11 Cross recessed hex head bolt and flat washer assembly;

---GB/T 9074.12 cross recessed hex head bolt and spring washer assembly;

---GB/T 9074.13 Cross recessed hex head bolts, spring washers and flat washer assemblies;

---GB/T 9074.15 Hex head bolt and spring washer assembly;

---GB/T 9074.16 Hex head bolt and outer serrated lock washer assembly;

---GB/T 9074.17 Hex head bolts, spring washers and flat washer assemblies;

---GB/T 9074.18 self-tapping screws and flat washer assemblies;

---GB/T 9074.20 cross recessed hex head self-tapping screws and flat washer assembly;

---GB/T 9074.26 Spring washers for assemblies;

---GB/T 9074.27 External sawtooth lock washer for assembly;

---GB/T 9074.28 Conical locking washer for assembly;

---GB/T 9074.31 Conical elastic washers for assemblies;

---GB/T 9074.32 Bolt or screw and tapered elastic washer assembly.

This part is the 31st part of GB/T 9074.

This part is drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This part of GB/T 9074 specifies the type dimensions, technical conditions and markings of tapered elastic washers for assemblies.

This section applies to tapered washers for bolts or screws and tapered washer assemblies in accordance with GB/T 9074.32 (hereinafter referred to as pads) ring). This section applies to bolts or screws with specifications of 2.5mm~12mm and performance grades of 8.8 and 10.9 (GB/T 3098.1)

The gasket used. For bolts or screws with a performance rating below 8.8, the performance of the gasket will be significantly reduced due to deformation of the contact surface.

Note: After installation with a sufficiently high preload, the gasket prevents preload loss due to deformation and creep. Residual elastic force according to GB/T 94.4 Can be used as a gasket for initial performance evaluation. Under lateral load, the loosening performance cannot be guaranteed, so it is only used for short bolts that mainly bear axial loads.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 90.1 fastener acceptance inspection

GB/T 90.2 Fastener Marking and Packaging

GB/T 94.4 Elastic washer technical condition Conical elastic washer

GB/T 1237 fastener marking method

GB/T 5267.1 fastener plating

GB/T 5267.2 fastener non-electrolytic zinc sheet coating

3 Size

The dimensions of the gasket are shown in Figure 1 and Table 1. Dimensional tolerances apply before plating.

4 Technical conditions and reference standards

The technical conditions and reference standards are shown in Table 2.

5 Mark