JB/T 58651.8-1999 Fastener product quality classification Self-tapping screws

JB/T 58651.8-1999 Fasteners Product Quality Classification Self-tapping screws JB/T58651.8-1999 Standard download decompression password: www.bzxz.net

Mechanical Industry Standards of the People's Republic of China
JE/T 58651.1~58651.14-1999
JB/T58652-1999
Quality Classification of Fastener Products
(Internal Use)
Published on 1999-12-30
National Bureau of Machinery Industry
Implemented on 2000-06-01
Mechanical Industry Standards of the People's Republic of China
Quality Classification of Fastener Products
(For Internal Use)
Self-tapping Screws
JB/T58651.8-1999
Price 8/1 5k651.8-93
This standard specifies the principles and methods for grading self-made products produced according to domestic and industry standards. It can be used as a reference when grading the quality of self-drilling nails produced according to other standards. This standard adopts grade classification, i.e., qualified products, second-class products, and qualified products: this standard is applicable to a single batch of qualified products of the company. The size codes used in this standard are consistent with the current self-tapping screw standards. The self-tapping screw products used in this standard include self-tapping screws, self-tapping locking screws and wallboard self-tapping screws. 1
Cited standards
The texts contained in the standard are cited in this standard and constitute the provisions of this standard. This standard is valid for the versions shown in the following: All standards will be revised. All industries using this standard should explore the possibility of using the latest versions of the following standards: GR90-:985
G0T 944.11985
Inspection, marking and packaging of fasteners
Slots for screws
GB:T 12i4.2--19S6
Vernier ruler and vernier caliper
GD/T 1216-1985
GBT 3098.5—1986
GBT 3098.7—1986
GB5279—1585
GE/T 6559... 1986Www.bzxZ.net
GE/T14210199:
Outer diameter·F-outer dimension
Mechanical properties of fastenersWhite tapping agent
Mechanical properties of fastenersSelf-tapping locking screws! Ordinary countersunk thread series countersunk head frequency measurement and monitoring of the actual part shape and measurement
Daily tapping screws coarse thread ordinary thread series plate tapping screws
JB Hall 58651.1—1999
General principles for fastening product quality grading
3 Terms, terms and calculation formulas
The definition of penetration grade, defect weight and reverse defect score and the calculation formula of unit defect score shall be in accordance with 1B/T58651.1. 4 Inspection items, sampling plan, defect grade and weighted value Self-tapping product delivery date, sampling plan, defect grade and weighted value according to the table! 5. Grading standards
The quality grading standards for tapping screws are determined according to Table 2: National Machinery Industry Bureau 1999-12-5 price approval 34
10161 real bottle
6. Inspection method
JB/T58651.81999
The inspection force of tapping screws is specified in Table 3. Table
Spot check must be monthly
Side measurement:
Use sense
Opening width seat
Opening sea use!
1 word push new people to visit Beijing
Compared to the original diameter d
Beautiful miscellaneous products
Head front height +
Gingival pattern large diameter d
Anti-head screw head shape makeup
Liang outer four Lu diameter
Ministry of Culture
Nominal length Zhuang
Surface missing map
Non-breaking returnable profit inspection
Urine and other payments
Meeting boutique
First-class products
Superior products
Sampling square carbon
0 days delivery GB/3098.5 N/T30987 CB/T14210 regulations 0
Unit price missing fine points standard service
F> 424
0.169F=0.424
Oil generation dam project
Lead edge width quality,
Negative illumination e
Unable to measure
T diagnosis degree!
Cross drag drawing depth
Thread small light d
Say miscellaneous products
Head post height
Smoke collection major diameter d.
Pleasant head Yaoshu head shape coal
Sex rod external control piece size
Nominal length!
I'm about to fall
The machine is recovering
JB/T58651.8—1999
()Caliper
（2]Special modification is
()Caliper
（2）Special replacement for civilian
12）Special inspection date
(T) KR
12）Special inspection tool
Digital measurement table
（2】Special inspection tool
Dry scale
Special measuring ship
Special crown gauge
（2）Use to check
loose standard, rule road
G9/T1314.2
GB/F1214.2
112142
T 1214 2
GBT S44.1
GB/Gate 1214.2
GB/T 1214.2
:GB/T[2G
ORF3279
GB/T6559
GB/T 1214.2
(01 02mm
GB/T1214.2
Test method
Existing high-end test standard domestic test
In the wrench, use the inner see
In the shallowest effective edge one call
Bend: along the fast center line one convex bottom) to carry out
caliper (through the outer
month and necessary continental products
Use? Divider ruler in 12 measurement
Light 33/5279 provisions
Special old light book ring gauge can reach
Through: screw request can not afford
End slip ring gauge
GBT30985 or Mx?
GB/T142J0 specified
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