This part specifies hexagon socket countersunk head self-tapping screws with thread specifications of ST2.9 to ST6.3. If other technical requirements are required, they should be selected from the current standards (such as GB/T5280, GB/T3098.5 and GB/T3103.1). GB/T 2670.3-2004 Hexagon socket countersunk head self-tapping screws GB/T2670.3-2004 Standard download decompression password: www.bzxz.net

JCS 21.D60.10
National Standard of the People's Republic of China
GB/T2670.3—2004
Hexalobalar socket raised countersunk (oval) head tapping screws
Hexalobalar socket raised countersunk (oval) head tapping screws(IS0 14587.2001.M0D)
2004-02-10 Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Administration of Standardization of the People's Republic of China
2004-08-01 Implementation
This part is one of the national standard\hexalobalar socket\product series standards, the series includes: GHT2701
GB/T 267J.2—2002bzxZ.net
GR/T 2670, 8-2324
GB/T 2571.1 2404
GB/T2671.2—2334
G/ T 2577.20(14
Hexalobular pan head self-tapping screw
Inner angle countersunk head self-tapping screw:
Inner hexagonal countersunk head self-tapping screw;
Inner hexagonal countersunk head screw:
Inner hexagonal countersunk head screw;
Inner hexagonal countersunk head screw:
GT2$7.—18: Inner angle countersunk head screw:GH/12574-2004
Inner hexagonal countersunk head screw:
This part is the third part of B/T25.
G/T 2670.3—2004
4 The previous revision adopted 1501458?: 20) 13 Hexagon socket semi-countersunk head self-drilling screws of type 3, mainly revised, I5145A7 did not see the actual installation or technical requirements, this part is based on the provisions of 1 see Table 2): JSD14587 does not specify the simplified marking. This part is based on the principles of chemical treatment of /T1217 and the commercial marking of the demonstration (see 5.2). This part is issued by the China Machinery Industry Federation, and the car part is drafted by the National Machinery Science and Technology Committee (SAC/TC.8). This part is published for the first time.
1 Scope
Hexagon socket semi-countersunk head self-drilling screws
This part specifies the thread specifications of S2S~ST, Hexagonal flower-shaped semi-tipped self-drilling screws GB/T2670.3—2004
If other technical requirements are required, samples should be selected from the current standards (GB/5850, GH/T8098, 5 and G/T3101.1). 2 Normative references
The clauses in the following documents are the clauses of this part through reference to this part of GB/T 3101.1. The dated applicable documents and all subsequent amendments (excluding errata) or revisions are not applicable to this part. However, the parties who have made agreements based on this part shall use the latest versions of these documents. For any referenced documents with undated dates, the latest versions shall apply as follows:
According to the acceptance inspection of the same parts [G90.1—200211503269:500GB/T .1
GB/T90.2 Fastener marking and packaging
/237 Fastener marking 2372000,150X991186) GB/T3038.5 Mechanical properties of required parts (G3/TC98.52000.Gt1SO2732:1W2) GH:T 3:03. 1
Parts male screw inspection, screw properties and screw quality [GRT3103.1-2C02idtIS0) 4759-1:2000 Parts electroplating layer (GH/152%1-2002IS4042:1999.11TGB/T 5257.1
GB/T527!
Military firmware "explosion inspection, building nails, period master change report mother scale tenth generation and standard juice (GB/5276,
ISO 225:1U83)
GH/T528
GR/T G1AA
3 Size
White drying nail m olefin number (GB/T52912002i115()147:190) flammable and explosive nails with hexagonal internal shape (GB/T6188-20C.idt15()10664:1999) size code and marking and exceptions for the plastic size of drying nails that conform to B/5276 see Figure 1 and Table 1. 1
GB/T2670.3—2004
I can be one or three, especially in Figure 1
Baking effect visit
To hexagonal shape
C type, K to
3:1, 3
Note except for the mold or space is the commercial ratio limit specification, r.
The support is empty, the buckle is complete and the effect is within the surface. The actual size of the post is in accordance with the T regulations
The degree of incomplete frequency change.
Table of "an actual starting value, not suitable for manufacturing an
514, 2
H/T2670.32004
GB/T 2670.3—2002
4 Technical conditions and referenced standards
For technical conditions and referenced standards, see Table 2
For the six cities of rock breeding, the internal shape
Processing and processing
Integration and packaging
5 Marking
Marking method BT123 stipulates,
5.2 Marking example
Table 2 Technical conditions and referenced standards
Products, etc.
Forward G6:3093.5 for convenience
GR/T 52HC
G/7 31c3.1
Not for burial,
Extreme environment technology should be in accordance with 1/2571
GE/T U.1,G3/T U.2
Spiral grade olefin 53.5, male length (-15mm, zinc, C-type hexagonal flower-shaped semi-countersunk door nails, white government blasting nails H2570.353.5:16
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