This part specifies the guaranteed torque grade, guaranteed torque value and test method applicable to national standard butterfly nuts. GB/T 3098.20-2004 Mechanical properties of fasteners Butterfly nuts guaranteed torque GB/T3098.20-2004 Standard download decompression password: www.bzxz.net

IC5.2'.060.20
National Standard of the People's Republic of China
GB/T3098.20—2004
Mechanical properties of fasteners
Butterfly nuts
Guaranteed torque
Mechanical properlies uf fasleners-Wing nuts with sperified product2004-02-10Promulgated
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Implementation on August 1, 2004
This part is one of the series of national standards "Shunshan mechanical parts reduction and grease supplement", which also includes: GB/T S0S8.-—2000
GR/T $0SN, 2—200
GB/T S0SE.32000
GB/ T 3098. 4
1h: T 31:93. 5-200u
GB/T H0PR. 3093. 10 --1SS3
GH/1 3098.11
GB/T S0U8.12—1JS
:B/T3098.15
path 1~cram
GH/T 3058. 14
-4GB/T 3068.15—2000
Gn/0S8.16200
GB/T 30$8.7—2000
5/1 #098.:3 2004
G3/T 30U. .3—2(m1
Parts mechanical properties
Steaming machine properties
Replacing machine properties
Deep mechanical properties
Case mechanical properties
Fastener mechanical properties
Fastener mechanical properties
Fastener mechanical properties
Fastener mechanical properties
Fastener mechanical properties
Fastener mechanical properties
Fastener mechanical properties
Fastener mechanical properties
Fastener mechanical properties
Accumulative solidification properties
Fastener torsion properties|| Mechanical production of fasteners: bolts, screws and screws, coarse pitch screw thread; fixed thread: fine pitch screw thread; self-closing screw: stainless steel sliding bolts, nails and bursting posts; pressed screws: heat-resistant and effective continuous press pairs: effective and rectangular steel nuts G3/T 3098. 20—20C4; screws made of non-ferrous metals, nuts; self-closing screws: nut shape guarantee test! bzxz.net
Fixture mechanical properties
Mechanical properties of parts
Screw selection and continuous driving torque test and technical damage torque nominal straight green female test
Stainless steel screw:
Parts performance
Fixture mechanical properties
Stainless steel fasteners:
Polymer mechanical carbon ​​manganese energy
Color signature inspection parallel text recording surface method; Donggu machine city three energy self-drinking test method: Fastener mechanical properties core pulling inhibition:
G15/T 398. 20)2U04
Fasteners, performance, mold, and torque, this part is 13T308 Part 0:
During the preparation and ordering, this standard S11-994 (monthly version) was proposed for the production of a series of standards for screw nuts in my country, and the "guaranteed design and approval cabinet" test force method was added. The standard was included in the "National Fasteners Performance" series of standards.
This part was jointly proposed by the Ten National Machinery Industry Corporation. This part is under the responsibility of the National Machinery Industry Association (SAC/TC) and the China National Fasteners Standardization Technical Committee Secretariat. This part is published for the first time
Fasteners, mechanical properties
Butterfly nut, torque, and torque,
G8/1 3098.2G—2004
This part specifies the guarantee values ​​and test methods applicable to national standards. 2 Guaranteed bearing grade and guaranteed bearing torque value
The guaranteed bearing grade of the steel beam is composed of a single digit, which is a code. It is applicable to the guaranteed torque value of steel beam products specified in national standards
. When the test is carried out according to the method specified in Section 4 at room temperature, the torque of the steel beam shall not change, and the sound shall not be significantly affected: the torque can be removed by hand, or by loosening the material, but it shall not exceed half a dozen. During the test, if the test is damaged, the test degree is: Table 1
Guaranteed torque
The test method is to test the torque level of the frame. The unit is in the table. The test of the guaranteed torque of the end nut should be carried out according to 3.2. The test position should be determined. The test should meet the requirements of the above two. 3.1 Fixing bolt method
Remove the oil-proof and washer from the end nut, as shown in 1, and use a clamp to tighten the bolt head (it cannot be rotated), and then use a special tool (the screw threader can be tightened to achieve the guaranteed torque specified in Table 1, as shown in 3.2. The method
Remove the oil-proof and screw thread of the end nut, as shown in 1. After the test, the tension of the nut can reach the guaranteed torque specified in Table 1, as shown in Figure 4. GE/1 3098,20—2004
Wukang period
factory now draws the length of the completed and explosive part,
see the product standard large size industry
drawing 301 drawing strict product beauty effect,
1.27 level: production
installation test honeycomb
Figure 2 special fixture
female decision tool
Bernard-shaped combustion piece product size in the small
fixed screw method
half:
special document
or inspection stamp
reach the purpose
media-shaped explosion tooth strict product standard hole size, Figure 4 fixed explosion mother method
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