JB/T 58651.9-1999 Fastener Product Quality Grading Washer JB/T58651.9-1999 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
Fastener Product Quality Grading
(Internal Use)
1999-12-30 Issued by
National Machinery Industry Bureau
2000-06-01Implementation
Machinery Industry Standard of the People's Republic of China
Quality Classification of Hardware Products
(Internal Use)
JB/T58651.9—1999
Replaced by JB.T58651.9—93
This standard specifies the principles and methods for quality classification of hardware products produced according to national and industry standards. It can also be used as a reference for quality classification of hardware products produced according to other standards. This standard adopts a three-level classification system, namely, superior products, first-class products, and qualified products. This standard applies to single specification product batches accepted according to 6B/90. The size codes used in this standard are consistent with the current generation standards. The pad products applicable to this standard include half-rings, single-rings, elastic rings, locking rings and stop rings: 2 Reference standards
The provisions contained in the following standards become the provisions of this standard through reference in this standard. When this standard is issued, all versions are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards: GB/T 901985
GR/T1214.2—1996
JB/T 8788-1908
Acceptance inspection, marking and packaging of hardwarewwW.bzxz.Net
Vernier caliper Vernier caliper
JB/T58651.1—1999 General classification of hardware product quality 3 Terms, terms and calculation formulas
The definitions of defect grades, defect weighted values ​​and unit defect scores and the calculation formula of unit defect scores shall be in accordance with the provisions of [BT58651.1. 4 Inspection items, sampling plans, defect grades and weighted values ​​The inspection items, sampling plans, defect grades and weighted values ​​of pad products shall be in accordance with the provisions of Table 1. S Grading standards
The grading standards of pad products shall be in accordance with the provisions of Table 2. 6 Inspection methods
The inspection methods of pad products shall be in accordance with the provisions of Table 3. Approved by the State Machinery Industry Bureau on November 30, 1999, June 1, 2000 Implementation
Jingcha River
Inner light school
Outer diameter 4 or D
Mixed products
Ankou flow#
Flat pad plane
Item and equivalent
Quality products
·School products
Superior products
Non-diameter, or
Mixed products
Original degree Ping domain
Height HA
With width
Heat Flatness
Surface defects
Mechanical properties
Caliper or gauge
Inspection cavity platform and layout
JB/T5865L.9-1999
Standard, specification
GB/[1214.2
0.020.05mm
GB/T12t4.2
:GHT1214.2
: GB/T 1214.2
GP/T1214.2
GB/T1214.2
1.0Siemri
JTRTRR
Unit decision point standard product
0.105 < Fe=0.263
Inspection method selection
A certificate pad with D.02mm caliper, K with 0.5mm caliper in any two squares! Carry out the measurement in any two squares
Monthly measurement modification
Remove the bad judgment, use a flat pad, four cards! Line
Place the two rooms on the inspection platform 1, and use the product ruler to inspect the self-
Connect the industry standard provisions
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