1、UDC 621.882.443 DEUTSCHE NORM October 1989 c 8 m ._ - FD c E Z o) C a n E o L O .- 5 E p. o) .- .- o b o o U m n. L o 2. : E o a 5 c o). v .- r - m P O z Square taper washers for high-strength structural bolting of steel I sections DIN 691 7 _ Scheiben, vierkant, keilfrmig, fr HV-Schrauben an I-Prof
2、ilen in Stahlkonstruktionen Supersedes March 1979 edition. In keeping with current practice in standards published by the International Organization for Standardization (WO), a comma has been used throughout as the decimal marker. Dimensions in mm 1 Scope and field of application Washers as specifie
3、d in this standard are intended for use in GV and SL structural bolting of steel I sections in accord- ance with DIN 18800 Part 1, together with DIN 6914 screws and DIN 6915 nuts. 2 Dimensions Symbol HV (on bottom side) Space for manufacturers symbol (on bottom side) Rolled-in groove for indication
4、of taper (on top side) Continued on pages 2 and 3 DIN 6917 Engl. Price group Beuth Verlag GmbH. Berlin. has the exclusive right of sale for German Standards (DIN-Normen). 04.90 Sales No. 0105 Page 2 DIN 6917 N 03 a- - x I t E” -+- .i! 8 52.: 8 i z .- DIN 6917 Page3 3 Technical delivery conditions 3.
5、1 Material Washers shall be in steel as specified in DIN 17 200, quenched and tempered to a hardness of from 295 to 350 HV 10 (e.g. C 45 steel), at the manufacturers discretion. 3.2 Surface finish Washers shall have a bright surface finish, be free from burr, and be hot dip galvanized as specified i
6、n DIN.267 Part 10. 3.3 Acceptance inspection Acceptance inspection shall be undertaken on the lines of DIN 267 Part 5. The specifications given in table 2 shall apply for the major characteristics and the acceptable quality level (AQL). Table 2. Major characteristic AQL value Hole diameter Concentri
7、city Taper angle 4 Designation Designation of a nominal size 21 washer for use with steel I sections: Washer DIN 6917 - 21 5 Marking Washers shall be marked on their bottom side with the manufacturers symbol and symbol HV. Standards referred to DIN DIN DIN 6914 DIN 6915 DIN 17200 DIN 18 800 Part 1 2
8、67 Part 5 Fasteners; technical delivery conditions; acceptance inspection (modified version of IS0 3269, 7984 edition) 267 Part 10 Fasteners; technical delivery conditions, hot-dip galvanized components High-strength hexagon head bolts with large widths across flats for structural steel bolting High
9、-strength hexagon nuts with large widths across flats for structural steel bolting Steels for quenching and tempering; technical delivery conditions Steel structures; design and construction Previous editions DIN 6917: 08.62, 12.70,03.79. Amendments The following amendments have been made to the Mar
10、ch 1979 edition. a) Limits of size are now specified. b) Use of materials as specified in DIN 17 200 that are comparable with C 45 has been permitted. c) Washers are now to be quenched and tempered, as opposed to hardened (as specified before). d) Washers are now to be hot dip galvanized as specifie
11、d in DIN 267 Part 10. e) Washers are now to be subjected to acceptance inspection as specified in DIN 267 Part 5 has been included. f) A specification regarding marking with the manufacturers symbol has been included. g) The standard has been editorially revised. International Patent Classification E 04 B 1/38 F 16 B 43/00
