1 Scope
This part specifies of GB/T 3098 specifies the materials, technical requirements and test methods of tapping screws.
This part is applicable to tapping screws made from carburizing steel, with thread specification of ST 2.2~ST 9.5 and meeting the requirements of GB/T 5280.
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.
GB/T 3098.13-1996 Mechanical Properties of Fasteners - Torsional Test and Minimum Torques for Bolts and Screws with Nominal Diameters 1mm to 10mm (idt ISO 898-7:1992)
GB/T 4340.1 Metallic Materials - Vickers Hardness Test - Part 1: Test Method (GB/T 4340.1-2009, ISO 6507-1:2005, MOD)
GB/T 5280 Tapping Screws Thread (GB/T 5280-2002, idt ISO 1478:1999)
3 Materials
Tapping screws shall be made from cold heading, case hardening quality steel.
Foreword i
1 Scope
2 Normative References
3 Materials
4 Technical Requirements
5 Acceptance
6 Test Methods
