JB/T 58651.5-1999 Fastener Product Quality Classification Machine Screws JB/T58651.5-1999 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 Grading 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 Grading of Fastener Products
Machine Screws
(For Drawing Department Use)
IR/T 58651.5—1999
B:T58(651.5—03
4 standard specifies the principles and methods for grading the quality of machine screw products produced according to national standards and industry standards: it can also be used as a reference when grading the quality of machine screw products produced according to other standards. This standard uses the first-class grading, that is, superior products. The terms first-class products and qualified products are used for single batches of micro-grid products received in accordance with monthly production. The industry codes used in this standard are consistent with the current machine screw standards. The machine screw products applicable to this standard refer to open-band and slot screws, as well as special-shaped screws and non-slip screws. 2 Reference standards
The provisions contained in the following standards are referenced in this standard or are not provisions of this standard. This standard is valid at the time of publication and all versions. All standards will be revised. All parties using this standard should explore the possibility of using the latest versions of the following standards. GD/T 901985
GD.T 944.1[985
CD/T 12142——1996
GB/T12161985
GBT12151985
GH/T 3099.11982
(confirmed in 1988)
GBT 3099.6—1986
GBT3934—1983
GB/T 5279—1985
GR/T 5779.1—1986
JB/T8788—1998
JB/T 5865t.11999
Nouns, terms and calculation formulas
Acceptance inspection, marking and packaging for tightness
Tightness test report for wet nails
Vernier caliperVernier caliper
External range micrometer
Digital indicator
General properties of fastenersMechanical properties of fastenersBolts, screws and studsMechanical properties of fastenersStainless steel bolts, nails, studs and screwsThread gauge
Head shape and measurement of countersunk screws
General inspection of defects, nests and screws of fasteners Requirements General rules for fastener product quality grading Definitions of defect grade, defect weighted value and unit defect grade Standards Unit defect grade calculation formula is as per JB/T586S1.1: 4 Inspection items, sampling methods, defect grade and weighted value Machine screw products’ items, sampling methods, defect grade and weighted value are as per Table 1, National Machinery Industry Quality Management System Approved on December 30, 1999 24 20006-0 5 Grading standards JBr 54651.5--1999 Machine screw production certificate is as per Table 2, Inspection methods Machine screw products’ inspection methods are as per Table 1. !
Effective through-view of the limited diameter and small diameter
Support this work (the vehicle is light)
And cherish the degree
Open the degree, the bowl short treatment is divided into the thickness of the support surface and the support surface W is afraid of inserting people deep courtyard
Condensed miscellaneous products
Ministry of Industry Lu Program: d
Ministry of High Reality
Counter-sunk head shape
Nominal length
This length
Effective light d||t t||The symmetry of the head opening to the screw axis
The pole ratio line change
Class II old road
Class table metal defects
Non-destructive parts inspection
First-class products
Superior products
Selective inspection
Items are in accordance with GBT38I or GRT0GR. regulations
Unit defect classification
.152 381
Draw at the top
JB/T58651.5—1999
Take this extension (the length of the egg path of the earthworm pattern) usually explores the bad trend end effect mountain course (Swiss effect single counting point)wwW.bzxz.Net
Open the store wide R
and describe the deep excitement
Yuge shoot the bottom
connect the miscellaneous products
head diameter.
Countersunk screw support
Nominal length
Effective screw length point
Explosive fire heart
Head Liu magnetic rod line bearing axis should
Right bead
Burning support blood line control
Surface defect reduction
One firewood test surface fat
Machine combustion energy
Mountain Rui end effect ring gauge
(2) Special inspection month||tt| |(1) Caliper
(2) Special gauge
" word increase measuring wave meter
(2) Special calibration
(2) Special gauge
Special calorimeter
Self-test meter and special
V-shaped table or caliper
Special inspection slow type
Flat and designated ruler
Standard, specification
G/T 3934
G/T 3934
GB/T 1214.2
GB/T1214.2
GB7 1214.2
CDVT 12142
GBVT 5279
GBVT12142
GB/T 1214.2
CD/1216
GDr1214.2
CD/T1219
GB/T 1214.2
u.07.arim
GB 1219
GRT 1214
JRT788
Lamu in the law
And the next will be upgraded to the regulations, virtual can smoothly pass the ground to the canal regulations, but can not give
two screw "transportation ring now plan can:
in the shallow place! Call habit-:
along the center line of the coast) into, measurement
measurement must be modified in the year
city GB/T5279 regulations
fear of the end of the long side of the science to meet the measurement
with the long side of the screw, period
to remember the running of the real
(The length of the bacteria inside the groove is visible) At the station, follow the axis square groove, any vertical diameter of the vertical measurement (
is longer than this and the entire effective part is excluded) is measured to the end of the effective system (the length of the effective system is slightly too long to be within the standard of the screw): first measure the distance between the burning line and the head, and then the relative force is generated. The difference is the measurement. Use the inspection platform
according to GHT≤779| provisions
GB/30081 or GBT3008.6
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