Technical information

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Pict

Feature

Symbol

Additional info

Size

Product class A

(previously “m”)

Product class B

(previously “mg”)

Product class C

(previously “g”

NOTE!

1 Straightness

l = nominal length

b = thread length

d ≤ 8

0,0020 l + 0,05

2 X (0,0020 b + 0,05)

d > 8

0,0025 l + 0,05

2 X (0,0025 b + 0,05)

2 Thread length

P = pitch

ls = non-threaded min length

lg = non-threaded max length

0…+2P*

* tolerace +2P is valid only if ls or lg is not specified in product standard

stud bolt

js16

js17

3 Thread toler-

ance

nut

screw

4 Head height

outside

drive

k < 10

js14

js15

js16

k ≥ 10

js17

inside drive k

M ≤ 5

h13

M > 5

h14

5 Head diameter

h13*

h14

* in machine screws h14

6 Nut’s height

≤ M12

h14

h17

> M12 ≤

M18

h15

> M18

h16

7 Nominal length

l ≤ 150

js15*

js17

* in machine screws l > 50 js16

l > 150

2 X js17

8 Shank diameter

h13

h14

± IT15

9 Slot width*

n ≤ 1

+0,06…+0,20

* depth of slots and sockets: see product standards

1 < n ≤ 3 +0,06…+0,31

3 < n ≤ 6 +0,07…+0,37

10 Width

across

flats

outside

drive

s ≤ 32 → h13

s > 32 → h14

s ≤ 19 → h14

19 < s ≤ 60 → h15

60 < s ≤ 180 → h16

s > 180 → h17

inside drive s

s = 0,7 → EF8

s = 0,9 → JS9

s = 1,3 → K9

s = 1,5…2,0 → D10

(D9*)

s = 2,5 → D11 (D10*)

s = 3,0 → D11

s = 4,0 → E11

s = 5,0…14,0 → E12

(E11*)

s > 14,0 → D12

* tolerance range for socket set screws

12 Angle

90°

M ≤ 39

± 1°

± 2°

M > 39

± 1/2°

± 1°

Screws acc. to

DIN-standard

84, 85, 444C, 478,

479,

480, 561, 564, 609,

610,

653, 787, 835, 912,

931,

933, 938, 939, 940,

960,

961, 963, 964, 965,

966,

6912, 7380, 7513,

7516,

7971-7985, 7991

444B

609, 610 ≥ M12,

931, 933 > M24

960, 961

L>10d/>150mm

95, 96, 97, 186, 188,

261, 316, 444A, 525,

529, 558, 571, 601,

603, 604, 605, 607,

608, 6914, 7968,

7969, 7990, 11014

Nuts acc. to

DIN-standard

439, 466, 467, 917,

934,

935, 936, 937, 979,

980,

982 ≤ M12, 985 ≤

M12,

986, 1587, 6330,

6331

439, 562, 934, 935,

936,

980 ≥ M16, 982 ≥

M16,

985 ≥ M16, 1587,

6915,

7965

314, 315, 555, 557,

935