De c ember 2001
Daimler-Benz
Hexalobular socket raised head screws
with collar
MBN 10 228
Continued on pages 2 and 3
Issued by:
DaimlerChrysler AG D-70546 Stuttgart
Standards (H. Pfander); Tel.: (+49)711-17-41040
Technical responsibility (name): D?rfel Department: EP/QDN
Plant:019Telephone: (+49) 711 17- 4 17 42
HPC:
T722
Sequence number
14 320
Confidential! All rights reserved. Distribution or copies without written agreement by DaimlerChrysler AG prohibited.
Contractors may only receive standards through the responsible purchasing department.
Dimensions in mm
Scope
This standard contains specifications for hexalobular socket raised head screws with collar with coarse pitch thread, with nominal thread diameter from 3 mm to 8 mm, with property classes 8.8 in product grade A.The gauging of the hexalobular internal driving feature is specified in MBN 10 168.
Approval of suppliers
All Torx licensees of the Camcar Division of Textron Inc., USA, have unrestricted approval.
Other manufacturers wishing to be granted approval shall ensure that their products comply with the licensee's technical requirements. Product testing is required.
Dimensions, designation
Designation of a hexalobular socket raised head screw with collar, with thread M8, nominal length l = 60 mm, property class
8.8 and surface protection, e.g.:
Hexalobular screw MBN 10 228 - M8 x 60 - 8.8 DBL 9440.40
For the designation of types and designs with additional ordering information, refer to DIN 962.
Page 2
MBN10 228 : De c ember 2001
Thread size (d)
M3M4M5M6M8 P
1)
0,50,70,811,25 a
max.
11,41,622,5 b
2530405065 d a
max.3,64,75,76,89,2 max.7,51011,514,519 min.6,929,4210,813,818,16 max.2,523,253,954,756,15 min.2,282,953,654,455,85 max.0,81,11,351,82,2 min.0,60,91,051,41,8 r min.0,10,20,20,250,4 r f ?3,85,86,68,211 x
max.
1,251,7522,53,2Size T10
T20T25T30T45 A
2,8
3,954,55,67,95max.1,271,661,912,423,18min.
1,01
1,27
1,52
2,02
2,79
Length l
6810121620Thread approx. up to head
2530354045505560657080shank diameter ≈ flank diameter 90normal shank diameter allowed 100
Intermediate lengths shall be avoided wherever possible.
1) P = Pitch of the coarse pitch thread in accordance with DIN 13 Part 12
d k k c
Hexa-lobular internal driving feature
t
Page 3
MBN 10 228 : De c ember 2001
Technical delivery conditions
Material
Steel General requirements
International standard DIN ISO 8992
Tolerance
6 g
International standards
ISO 261, ISO 965-2
Property class (material)8.8
Standard
DIN EN ISO 898-1
Product grade A
International standards
DIN ISO 4759-1
Finish
As manufactured
Requirements for surface protection in accordance with DBL .
The limit values for surface defects are specified in DIN EN 26 157 Part 3.
Acceptability
For acceptance testing, DIN ISO 3269 and MBN 10 168 shall apply.
Thread rolling screws
- Case hardened and tempered thread rolling screws
Mechanical and performance requirements in accordance with DIN EN ISO 7085Designation example:
Hexalobular screw MBN 10 228 - M8 GFx 50 - St DBL 9440.40
Mechanical and performance requirements in accordance with MBN 7085-4Designation example:
Hexalobular screw MBN 10 228 – M5 DBx 40 - St DBL 9440.40
- Quenched and tempered thread rolling screws DUOTAPTITE
Mechanical and performance requirements in accordance with MBN 7085-2Designation example:
Hexalobular screw MBN 10 228 - M8 DTx 54 - 10.9 DBL 9440.40
Length grading in accordance with MBN 7085-2 Table 4.
Matrix of characteristics
For hexalobular socket screws in accordance with this standard, matrix of characteristics MBN 4000-2-1.2 shall apply.
Thread
Mechanical properties
Limit deviations and geometrical tolerances