This standard specifies hexagon socket countersunk head screws with thread specifications of M2 to M10, performance levels of 4.8, A2-70, A3-70, CU2 and CU3, and product grade A. If other technical requirements are required, they should be selected from the current standards (such as GB/T193, GB/T9145, GB/T3106, GB/T3098.1, GB/T3098.6 and GB/T3103.1). GB/T 2674-2004 Hexagon socket countersunk head screws GB/T2674-2004 Standard download decompression password: www.bzxz.net

ICS 21. 060. 10
National Standard of the People's Republic of China
GB/T2674—2004
Generation GH12574:1986
Hexalobular socket raised countersunk hcad screws
Hexalobular socket raised countersunk hcad screws(IS014584,2001,M0D)
2004-02-10 Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Standardization Administration of China
2004-08-01 Implementation
This standard is a national standard for "hexalobular socket screws\product series standard one: the series includes:) B7C.1200 internal A angle flower head self-drilling
H/T 2170, 22(4
Inner hexagonal countersunk head self-tapping;
(B/T2S70.2044 inner large angle flower-shaped card flow head mouth attack earning: d) K/12071.12334 inner flower-shaped low-profile head removal nail; heart
GB/T2571.2—2uU4 inner large angle flower-shaped round machine. Screw. 1GB/T2672—2231 inner hexagonal pan head class lamp: g) GB/T26731985 inner hexagonal flower-shaped countersunk head ticket lamp: G5T2674— 2CG4 Hexagonal half-flow head needs lamp. h)
GB/T2674—2004
This standard can be changed to adopt IS1-534:2001 Hexagonal half-flow head screw (English version), the above modifications are as follows, -S184 does not see the positioning installation technology requirements, this standard is difficult to regulate (see Table 2) 1S0) 1534 Liu has a color will show the burning needle end to give the mountain tool parts of the sex grade, this mark is specified (see Table IS151 end of the simplified mark, this standard is based on K123 7 is simplified and a simplified marking example is given (see E.2). This standard replaces G2674-8 hexagonal countersunk screws. The main changes of this standard G3/T274-385 are as follows: the thread pattern of M12. (M14), M16 and M20. M2, M2.5. M3, M3.5. M4 and M5 are added (see 1:
The number and size of the octagonal screw are adjusted (see Table 11); the corresponding performance grades of stainless steel and non-ferrous metal materials are added (see Table 2) Surface treatment of zinc and zinc concave solution "Table 2) This standard is proposed by the China Machinery Safety Industry Federation. This standard is drafted by the National Standardization Technical Committee S4T Center 851. The six standards are drafted by the Scientific Research Institute of the Standard. The current version of the standard is: 48/T26741881:
GB/T2674-1S86.
1 Specification
Hexagon socket countersunk head screws
CB/T 2674—2004
This standard specifies the hexagonal countersunk head with performance specifications of M2~M10, performance levels 4.H.A2-70.A370.CU2 and CL3, and product grade A.
If other technical requirements are required, they should be selected from the current standards (GB/T191, (/T9145, GB/T3106G/T3193, 1, GB/T3098.6 and GH/T3123.1). 2. Normative references
The clauses in the following documents become the provisions of this standard through reference in this standard. For all referenced documents with a specified period, all modifications (including auxiliary content) or revisions are not applicable to this standard. However, the latest version of this document can be obtained by studying the books and regulations that have been agreed upon based on this standard. For any referenced document without a date, the latest version does not apply to this standard. GR/T2 Fasteners External Parts (G: B/T2-2001.1804753: 1999) GR/T90.1 Fasteners Code (GH/90.12002.idtIS) 3239: 2uu0) GB/TSC,2 Fasteners Marking and Color Design
G/T Fasteners Direct and Frequency Series (G/: 3-20na12511998ISge: usmctric srrew ih: eusGeacral plaa.Mo) G1237 notation (G/1337-200 (1S0809: 1986) GBT3098.1 Fasteners Mechanical Sheet Energy Explosion, Lifting State Screw (CB/T3098.1-2000, 1d108981: 1999) GB/, 098, Fasteners Machine and World Energy Stainless Steel Bolts, Screws and Dry Rods (4H/339.62005dtIS) 35C6-1: 1S97 G/T3098.1 (Purple Solid Machine Performance Colored Gold Screen Manufacturing Square Screw Tolerances of bolts, ball screws, and purple column nuts ((G13/T3058.10-1993, IS0883.18e)
B/T3103.1 Parts Tolerances, Explosion-proof and (G/T109.1-2002.u19)4759-1:2(00)GHT3106
Thread diameter, length of screws and bolts and thread length of ordinary beam bolts (GB/T31C6-_82, eV130888.1975)
GB/T E267.1
Electroplating layer of complex hardware (4/5267.2002154042,.1G13/T 267,2
Non-electrolytic coating of fasteners (:T/T5267.2-002,1S0)10683:2000,IDT)GH/T 5276
Purple hardware
Explosion, explosion and release of the world size code and standard (G/T27-158,519Q225;1983)
Flow head hot nail solid part mesh quality (G/T279-198:,15)7721:1983)GB/TE279:E
GB/T 5779. -
Fastener surface depression bolt, sharp and tie column: teaching requirements (/1-2CC, IS0 5157-1; 1988)
G3/T188 frequency grid and hexagonal flower shape: GB/6188-2000, 1d10664: 19S)/9145 alarm frequency caused by auxiliary type, preferred system to limit the people (G/T9145200, S () 95-2: 1998, ISD greral pur[rosu metrie aerew thresdlg-- Telerilwes Iart 2, Limits nf aixes Inr geaeral pmjms?cxicrnai aud intcrral se\aw threadsMedium quality, MoT)) CB/T16088 General modification conditions for screw control, screw, class and screw ear (GB/T16439-17, dt150 8992.1986)
GB/T 2674—2004
3 Size
Size code and marking] CB/T3160.99
GE/T2674—2004
4 Technical conditions and referenced standards
Technical conditions and applicable approvals are shown in Table 2,
Lianzhou technical parts
Machine cutting performance
Product gradeWww.bzxZ.net
Inner shape
Agricultural Institute English trap
Table 2 Technical conditions and referenced standards
Not frequent worry
GR/T :ERSR
GB7T :$3,GB/T 5145
GR/- ..Y/9.1
Not subjected to surface modification.
Electricity, technical code according to
This surface is true
Acceptance contract line
5 mark
GHEAFT,
Non-two-floor
Request according to GTizhr.2
A2-70.A3-T0
GD/I 3103.1
GB/TG198
Simple treatment
Non-ferrous metals
GB/ >S5,1
General Office of Commerce:
Telephone: Technical requirements dial
GF/7 5267.1
Women need to share other surface maintenance, should provide demand side agreement 1-KT a:. IGRT 3G. 2
5.1 Marking method G3/T[237 standard completed
5.2 Marking example
Flame retardant d=MS. Nominal coefficient=2Jm Performance level is 4. Grade, 4 hexagon socket countersunk head screws without table value treatment are marked:
(/T2574M5×20
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