JB/T 58651.6-1999 Fasteners Product Quality Classification Set Screws JB/T58651.6-1999 Standard Download Decompression Password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JE/T 58651.1~58651.14-1999
JB/T58652-1999
Quality Grading of Fastener Products
(Internal Use)
Published on 1999-12-30
State Bureau of Machinery Industry
Implementation on 2000-06-01
Mechanical Industry Standard of the People's Republic of China
Quality Grading of Fastener Products
Set Screws
(Internal Use)
5B/T58651.6—1999
Chemical Industry Standard 8651.6—3
This standard specifies the principles and methods of quality grading of set screws produced in accordance with national standards or industry standards. The tightening screws produced according to other standards can also be used as a reference when the quality of the products is guaranteed. The standard adopts a one-level classification, namely, grade 1 products, first-class products, qualified products, and this standard is applicable to batches of single-specification products accepted according to GB/90. The size of the standard is not used in the standard, and the standard for tightening screws is not used in the standard. The following standards contain provisions that constitute technical standards through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest version of the following standards. GR/T 90—1985
GR/T1214.2—1996
GB/T 1216--1985
GB/T 1219--1983
GB/T3098.1—19$2
1 year confirmation)
GB/ 3098.6-1986
GB/I334—153
GB/T5779.11986
JB/T586S11999
3 Name, technical cycle and calculation formula
Acceptance inspection, marking and packaging
Vernier caliper Vernier caliper
Outer diameter bisection ruler
Dial indicator
Set screws
Mechanical properties of cumulative fasteners||tt| |Mechanical properties of fasteners Stainless steel bolts, screws, screws and screw thread gauges
Surface properties of fasteners General requirements for fasteners General rules for quality grading
Definition of defect grade, defect weighting value and unit defect grade standard and calculation formula of unit defect grade are in accordance with JB/T58651.1 4 Inspection items, sampling plan, defect grade and weighting value The inspection items and samples of fasteners are as follows, and the defect grade and weighting value are in accordance with Table 1. 5 Grading standards
Quality grading standard report of fasteners? Provisions: National Machinery Industry Bureau 3099-12-30 approved 2000-06-V1 implementation
Inspection square paint
JB/T58651.6-1999
The inspection method for set screw products shall be as specified in Table 3
Inspection items H
Width across flats 5
Correct plate e
Number of threads (the middle diameter and minor diameter of the thread) Thread effect (the single-medium diameter of the thread effect) || tt||TT-love film n
Depth of the new control points
along the miscellaneous products
egg system through d
nominal length!
Head height wastebzxz.net
national law point diameter
tight frequency setting round pull end to the burning rod bo line coaxiality of the central nail end bat and the burning key line of the vertical occupancy II. Class agricultural surface fast color
Class I surface defect drop
machine core performance
destructive light market||tt ||Non-breaking car inspection
Warehouse products
Superior products
: Defects
State Zizi Industry
Item H According to GB/T3098.3 or GB/T3098.6, 1.5
Unit missing points standard
Edge width
For the width
Ruyi pattern general standard, the applicable middle diameter dynamic small diameter: This standard (effective single middle diameter!
Down to the sea||tt| |Degree of report
Miscellaneous products
Flame efficiency major diameter
Nominal length:
Long lake length 2
Fire group height
Communication end diameter products
Polyester screw lamp creation Du type of hitting axis
Coaxial research
Purple fixed burning end increase and the vertical safety of the axis of the exciting rod
Second class surface defect
First class surface defect protection
Machine performance
JB/T 58651.6-1999 (1) Caliper (2) Special gauge (1) Caliper (2) Special gauge (through end burner ring gauge, screw ring gauge, screw ring gauge [2] Caliper (2) Special gauge (2) Special gauge (1) Caliper (2) Special gauge (1) Percentage gauge and special V-stand (2) Dial indicator and special V-stand, standard, GB/T12142 GB/T 1214.2
GET3934
GB/T3934
GR/T1214.2
GB/T1214.2
GBT1216
GB/T 12[4.2
GD:T 1214.2
GB/r1214.2
GB/11214.2
GH/T1219
OBT1219
Test force method
Hexagon socket: Three opposite sides at the question can be measured: Square head: Measure at
Hexagon socket: Three opposite directions at the question
Alliance: Square; within ±2 The old pitch should not exceed 100 (the ring is squeezed out when it is exhausted) in the shallow position (the center line of the situation is the bottom): the inner hexagonal hole is measured along the diagonal side. The most necessary measurement is along the thread axis load direction, in two straight directions that are mutually heavy! [Except for screw tail and incomplete threaded part]:
Measure from the long side of the required end
........
Put the screw on the V-shaped frame and rotate it upward. Use an ear to measure the needle.
Put the screw on the lower frame and rotate it. Use a vernier to measure the maximum difference in the index.
Change to GB/T5T79.I
According to GB/T309R.3 or GB/T30986
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