GB/T 898-1988 PDF in English
GB/T 898-1988 (GB/T898-1988, GBT 898-1988, GBT898-1988)
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Name of Chinese Standard | Status |
| GB/T 898-1988 | English | 100 |
Add to Cart
|
0-9 seconds. Auto-delivery.
|
Double end studs. bm=1.25d
| |
Standards related to: GB/T 898-1988
PDF Preview
GB/T 898-1988: PDF in English (GBT 898-1988) GB 898-1988
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
UDC 621.882
GB 898-88
Replacing GB 898-76
Double end studs - bm=1.25d
双头螺柱 bm=1.25d
ISSUED ON. JANUARY 26, 1988
IMPLEMENTED ON. JANUARY 01, 1989
Issued by. Ministry of Industry and Information Technology of the PRC
Table of Contents
1 Subject content ... 3
2 Reference standards ... 3
3 Dimensions ... 3
4 Specifications ... 8
5 Designation ... 8
Additional information ... 9
No.1 amendment ... 9
Double end studs - bm=1.25d
1 Subject content
This Standard specifies double end studs with thread diameters of M5~M48
and bm=1.25d.
Note. Commodity fastener varieties shall be preferred.
2 Reference standards
GB 2 Fasteners - Ends of parts with external thread
GB 196 General Purpose Metric Screw Threads - Basic Dimensions
GB 197 General purpose metric screw threads - Tolerances
GB 1167 The threads for transition fit
GB 3098.1 Mechanical properties of fasteners - Bolts, screws and studs
GB 3098.6 Mechanical properties of fasteners - Stainless steel bolts, screws,
studs and nuts
GB 3103.1 Tolerances for fasteners - Bolts, screws and nuts
GB 5267 Fasteners - Electroplated Coatings
GB 5779.1 Fasteners - Surface discontinuities - Bolts, screws and studs for
general requirements
GB 5779.3 Fasteners - Surface discontinuities - Bolts, screws and studs for
special requirements
GB 90 Acceptance inspection, marking and packaging of fasteners
GB 1237 Designation system for fasteners
3 Dimensions
The dimensions are shown in the figure below and Table 1, Table 2, and Table
3.
4 Specifications
Specifications are shown in Table 4.
Table 4
Material Steel Stainless steel
General purpose
metric screw threads
Tolerances 6g
Standards GB 196, GB 197
Threads for
transition fit
Codes GM, G2M
Standard GB 1167
Mechanical
properties
Grades 4.8, 5.8, 6.8, 8.8, 10.9, 12.9 A2-50, A2-70
Standards GB 3098.1 GB 3098.6
Tolerances Product grade Except as specified in Clause 3, grade B shall apply. Standard GB 3103.1
Surface finish Untreated; Oxidized; Zinc plating passivation; untreated for GB 5267
Surface discontinuities GB 5779.1, GB 5779.3
Acceptability and packaging GB 90
5 Designation
5.1 The designation system shall be in accordance with GB/T 1237.
5.2 Designation examples.
A property-class-4.8, non-surface treated, Type B bm=1.25d double end stud
with coarse general-purpose thread for both ends, with d=10mm and
l=50mm is designated as.
Stud GB 898 M10×50
A property-class-4.8, non-surface treated, Type A bm=1.25d double end stud
with coarse general-purpose thread for one end screwed into the body, with
fine general-purpose thread of pitch P=1mm for the end for screwing nut,
with d=10mm and l=50mm is designated as.
Stud GB 898 AM10-M10×1×50
A property-class-8.8, zinc-plating passivated, Type B bm=1.25d double end
stud with the first fit of threads for transition fit for one end screwed into the
body, with coarse general-purpose thread for the end for screwing nut, with
d=10mm and l=50mm is designated as.
Stud GB 898 GM10-M10×50-8.8-Zn • D
Additional information
This Standard was proposed by National Technical Committee 85 on Fasteners
of Standardization Administration of China.
This Standard shall be under the jurisdiction of China Academy of Machinery
Science and Technology.
This Standard was drafted by China Academy of Machinery Science and
Technology.
No.1 amendment
of GB/T 898-1988 “Double end studs - bm=1.25d”
This amendment has been approved by the General Administration of Quality Supervision,
Inspection and Quarantine on June 29, 1991 with the document No. 159 [1999] issued by
AQSIQ for national standard; and was implemented on December 1, 1991.
Xmax in Table 1 ~ Table 3 is changed from 1.5P to 2.5P.
All tables’ Note “When b-bm≤5mm, the end for screwing nut shall be made
rounded end;” is changed to. “When b-bm≤5mm, the end for screwing nut shall
be made rounded end, or a pit can be made at the center of the end face.”.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
|