JB/T 58651.2-1999 Fastener Product Quality Classification Bolt JB/T58651.2-1999 Standard Download Decompression Password: www.bzxz.net

Mechanical Industry Standards of the People's Republic of China
JB/r58651.1~58651.14-1999
JB/T58652-1999
Fastener Product Quality Grading
(Internal Use)
Published on December 30, 1999
National Bureau of Machinery Industry
200H0-(6-01 Implementation
JB.T58651.1-58651.14-1999
This series of standards is a revision of JB/T58651.1-58651.14-93 Fastener Product Quality Classification. During the revision, the original standard was revised and its main technical content changed. From the date of implementation, this series of standards will replace the Appendix A of JB/T58651.1-58651.14-93, and the Appendix A and Appendix B are the appendices for reminders. This series of standards was proposed and submitted by the Technical Committee for Standardization of Fasteners! : This series of standards is responsible for the following units: Shenyang Standard Parts Research Institute, Mechanical Science Research Institute of the Ministry of Machinery, Shanghai Fastener and Connection Material Technology Research Institute,
Mechanical Industry Standard of the People's Republic of China
Fastener Product Quality Classification
(Internal Use)|| tt||JB/T58651.2—1999
JB/586312—93
Production standard is to complete the principles and methods of quality classification of the products produced according to the national standards and industry standards. It can also be used as a reference when other products are strictly inspected for quality. This standard adopts two-level classification, namely, qualified products, first-class products and qualified products. This standard is applicable to the batches of single-specification products received according to 7/T0. : The text codes used in the standard are not valid. When the current standard is used, the texts contained in the referenced standard shall be used in this standard and constitute the provisions of this standard. This standard is valid for any period of time. The versions shown are valid for any period of time. All standards may be revised. All parties using this standard shall discuss the feasibility of using the latest versions of the following standards: G/F90.1985
G8/1 1214.2 [996 | 3096.6J986
CB/T 5934—1983
GB/[ 5779.1-1986
JB/T8788158
IB/T 5865 I.....1994
Nouns, terms and calculation formulas
Fastener acceptance inspection, marking and color matching
Vernier scale upper scale Vernier scale lower scale
Vernier scale and height scale caliper
Outside micrometer
Tightening mechanical performance inspection, mechanical properties of screws and studs
Communication frequency monitoring regulations
Stainless steel samples, screws, studs and nuts
Surface defects of other parts Bolts, bolts and nuts
General rules for fastener product quality classification
Definition of defect grade, actual weight and unit defect reduction standard and calculation formula of unit defect score shall be in accordance with JD/T58651.1.4 Sampling items, sampling plan, defect grade and additional reporting value Sampling items, sampling plan, defect grade and additional reporting value of explosive products shall be in accordance with the table! 5 Grading standards
The quality grading standards of the product are determined according to Table 2, approved by the Caojia Machinery Industry Exhibition on 1999-12-30 and implemented on 2000-06-01
6 Inspection methods
The inspection methods of the source plug products are specified in Table 3. No.
Odd Shunri
Width on the side 8
Width on the side 6
State grain suitable for no (non-use diameter and small light grain) one diameter
Congealed miscellaneous products
Under the national corner r
Fighting orange case pressure
Opening deep world
Head height
Grain diameter d
No period of validity scanning box
Public ball length business!
frequency level long belt
short hitting cloth degree,
supporting point diameter
through the country's diameter 4
total length
length and distance
pin diameter
multiple complete S
square length K,
cup width s
head thread thread axis
and beat the standard axis of the world
# or degree
second class surface sensitivity
once long Li Yue
JB/T58651.2—122
belly comfortable version
dismantle the blocking plan
tie performance
non-starting| |tt||acid ring basin
Liu reverse wide pressure
Liu made a craftsman
entertainment pattern notice spiral effect shrimp
use ten diameters and center diameters
burning no heat dry single
mixed products
A can be half r
dry push wide film
body science products
skirt and other products
JB/T58651.2—1999
table (】
item I B398.1B light 5169. Now set
! Special Sichuan inspection tool
12) special tool
piece Ruiqi
stop pattern ring courtyard
standard carving, now style
GIVT 1214.2
GWT 1214.2
GB/I3934
GR/T3954
(『：Special and semi-light diameter plate
（2）Diameter
（）Caliper
（2）Special safety equipment
121 Safety equipment
CBT 1214.2
GBC 1214.2
Nodal defect price indicator
II115I 23
0.152/0.381
Control force method
In the range of treatment
In the control height: range
Use the hand ring to observe the person, the heart can sound through 20k0
Four rings have no policy, the old 4 lines are left to calculate the center of the tube
In the control of the place (along the mouth of the call; along the axis of the courtyard) to measure
Head height +
Snail diameter
Or frequency material secret &
Public length!
Surprise quality
Bearing surface height 4.
Through the wave state auspicious d
No dryness of this rod!
3B/T 586S1.2—1999
Table 3 ()
(card core
【2】Special inspection fixture
type length, or distance,
mouth diameter d
5 all diameters
square effective pressure S,
light will pull the gauge
12) special inspection date
standard. Standard
GD/T12142
GB.T 1216
Test method
With the effective axis of the treatment end as the direction, multiply the full diameter of the continental length by one foot when the thread length is
at the time: at the time of the explosion number or the full elimination, the person sinks in the spiral layer without effective flow belt
GB/T1214.2
GB/T12142
G112142
G12142
G8/T12142
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GB/T 214.2
GB/T1214.
GR/T1214.2
GR/121-2.2
112142
GBT12142
GB/1214.2
In the branch surface, there is a diameter measurement at the library
from the end of the screw frequency K method to start the year
with the growth that has not been brought out, and the distance to the end of the bad specification is still (the negative length within the combustion efficiency ring specification should be removed) without measuring the starting point of the combination, and the whole point, the distance between the network points
is not fixed around the boundary, and can be reversed on the paper to measure the original support space to the part of the shrinkage format to eliminate the distance from the birth bearing measurement of the most technical ring surface
"The age efficiency ring should be removed and the cloud should be inverted! Only check the existing
at the high place of the square, the vertical
Jinghong
the two directions of the vertical
Jinghong
the head and end rod drawing
the intermediate shaft seat
the lifting rod drawing
the Liuwei
the online self-linear
the second type of core surface defect
the first type of surface defect
the anti-defect performance
JR/T58651-2-1999
Table 9 (complete)
standard, specification
special
diameter
shaped frame, caliper
Gufen clothing and special Y
shaped frame or height caliper
special inspection fill or flat
CBT1219
GRT 1214.3
CR:T 1219
.o2num
Test method
Measure the value of the busbar "question quotient or the question of the smaller question between the outer circle and the higher, and the relative force of the question range, the difference between the two is the test surface
The screw is brought in front of the special inspection of the inner thread effect, and the following standards are set:
Use the inspection platform and the feeler gauge to measure the maximum
According to GB/5779.1 provisions
According to GB/T3098.1 or GD/T3G/98.6 provisions 17
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