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KEBA FASTENING Products are available from:
MARYLAND METRICS
Supplying a complete range of specialty fasteners to different industries.
K-PT SCREWS

FASTENING SYSTEMS FOR THERMOPLASTICS
 
RYSB
YSB
YHB
AKB
AKBR
 
 
External thread Ø
d1
3,0
3,5
4,0
5,0
6,0
7,0
8,0
10,0
Thread core Ø
d2
1,66
1,91
2,17
2,68
3,19
3,70
Thread pitch
P
1,34
1,57
1,79
2,24
2,69
3,14
Thread run-out Xmax
standard L >
3.d1
3,0
3,5
4,0
5,0
6,0
7,0
shortened L <=
3.d1
1,5
1,8
2,0
2,5
3,0
3,5
RYSB
Head diameter
D
6,0
7,0
8,0
10,0
12,0
14,0
Head height
K
2,1
2,4
2,5
3,2
4,0
4,6
Washer thickness
S
0,7
0,8
0,9
1,1
1,3
1,5
A
H
width/size
m
2,9/1
3,5/2
4,1/2
4,8/2
6,4/3
7,0/3
cross
penetration depth t
min.
1,15
1,07
1,33
1,98
2,24
2,84
recess
max.
1,61
1,70
1,96
2,61
2,90
3,50
B
Z
width/size
m
2,8/1
3,8/2
4,2/2
4,7/2
6,3/3
7,0/3
cross
penetration depth t
min
1,26
1,08
1,40
2,01
2,27
2,91
recess
max.
1,51
1,54
1,86
2,47
2,73
3,37
YSB
Head diameter
D
5,3
6,1
7,0
8,8
10,5
12,3
Head height
K
2,0
2,5
2,7
3,4
4,0
4,5
A
H
width/size
m
2,9/1
4,0/2
4,3/2
4,9/2
6,5/3
7,1/3
cross
penetration depth t
min.
1,19
1,23
1,51
2,12
2,44
3,00
recess
max.
1,65
1,86
2,14
2,75
3,10
3,66
B
Z
width/size
m
2,9/1
3,9/2
4,3/2
4,9/2
6,6/3
7,1/3
cross
penetration depth t
min
1,36
1,26
1,62
2,23
2,57
3,14
recess
max.
1,61
1,72
2,08
2,67
3,03
3,61
YHB
Head diameter
D
5,5
7,3
8,4
9,3
11,3
13,6
Head height
c
0,35
0,40
0,45
0,50
0,55
0,60
A
H
width/size
m
2,7/1
3,9/2
4,2/2
4,6/2
5,2/2
6,9/3
cross
penetration depth t
min.
1,10
1,33
1,59
2,04
2,59
3,02
recess
max.
1,56
1,96
2,22
2,67
3,22
3,68
B
Z
width/size
m
2,7/1
4,0/2
4,2/2
4,6/2
5,1/2
6,8/3
cross
penetration depth t
min
1,20
1,47
1,70
2,06
2,60
3,01
recess
max.
1,45
1,93
2,16
2,52
3,06
3,47
AKB
 Width across flats SW
5,0
5,5
7,0
8,0
10,0
10,0
13,0
13,0
Head height K
1,5
2,3
2,3
3,0
3,5
4,8
5,3
5,8
AKBR
 Width across flats SW
5,0
5,5
5,5
7,0
8,0
8,0
10,0
13,0
Head height K
2,3
2,8
2,8
3,5
4,2
5,0
6,0
7,0
Washer Ø D
6,5
7,0
8,0
10,0
12,0
14,0
16,0
18,0
Washer thickness S
0,6
0,7
0,8
0,8
1,0
1,2
1,2
1,5
 
APPLICATION AREAS
  
TECHNICAL DETAILS
[1] 30° Flank Angle [2] Optimum Pitch
[3] Profiled Thread Root [4] Material Standard 10.9
[5] Economical K-PT Joints [6] Boss Design For K-PT Screws
[7] Relationship between torque and installation depth
RTSB
TSB
TMB
THB
 
External thread Ø
d1
3,0
3,5
4,0
5,0
6,0
7,0
8,0
10,0
Thread core Ø
d2
1,66
1,91
2,17
2,68
3,19
3,70
4,21
5,23
Thread pitch
P
1,34
1,57
1,79
2,24
2,69
3,14
3,59
4,49
Thread run-out Xmax
standard L >
3.d1
3,0
3,5
4,0
5,0
6,0
7,0
8,0
10,0
shortened L <=
3.d1
1,5
1,8
2,0
2,5
3,0
3,5
4,0
5,0
RTSB
Head diameter
D
6,0
7,0
8,0
10,0
12,0
14,0
16,0
20,0
Head height
K
2,1
2,4
2,6
3,3
3,6
4,2
4,8
5,5
INSTAR
T 10
T 10
T 20
T 20
T 25
T 30
T 40
T 40
A
m
2,80
2,80
3,95
3,95
4,50
5,60
6,75
6,75
Penetration depth t
min.
1,00
1,10
1,25
1,40
1,60
2,00
2,70
2,70
max.
1,30
1,40
1,70
1,80
2,00
2,40
3,20
3,20
Washer thickness
S
0,60
0,70
0,80
1,00
1,20
1,40
1,60
2,00
TSB
Head diameter
D
5,6
6,9
7,5
8,2
10,8
12,5
14,0
16,0
Head height
K
2,1
2,3
2,6
2,9
3,8
4,4
5,0
6,0
INSTAR
T 10
T 10
T 20
T 20
T 25
T 30
T 40
T 40
A
m
2,80
2,80
3,95
3,95
4,50
5,60
6,75
6,75
Penetration depth t
min.
1,00
1,10
1,25
1,40
1,60
2,00
2,40
2,70
max.
1,30
1,40
1,70
1,80
2,00
2,40
2,90
3,20
TMB
Head diameter
D
5,6
6,5
7,5
9,2
11,0
12,5
14,5
14,5
Head height
c
0,35
0,40
0,45
0,50
0,55
0,60
0,70,
0,70
  f
0,75
0,90
1,00
1,25
1,50
1,80
2,00
2,00
INSTAR
T 10
T 15
T 20
T 25
T 30
T 40
T 40
T 40
A
m
2,80
3,35
3,95
4,50
5,60
6,75
6,75
6,75
Penetration depth t
min.
1,00
1,20
1,40
1,60
2,00
2,70
2,70
2,70
max.
1,30
1,50
1,80
2,00
2,40
3,20
3,20
3,20
THB
Head diameter
D
5,5
7,3
8,4
9,3
11,3
13,6
15,8
Head height
c
0,35
0,40
0,45
0,50
0,55
0,60
0,70
INSTAR
T 8
T 15
T 20
T 20
T 30
T 40
T 40
A
max.
2,40
3,35
3,95
3,95
5,60
6,75
6,75
Penetration depth t
min.
0,80
1,00
1,25
1,25
1,75
2,25
2,40
max.
1,00
1,30
1,70
1,70
2,20
2,70
2,90
Note: INSTAR ~ internal hexalobular drive ~ ( torx® )
 
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Cross reference (head style)
K-PTEJOTK-PTEJOTK-PTEJOTK-PTEJOTK-PTEJOT
RYSBWN1411YSBWN1412YHBWN1413AKBWN1446AKBRWN1447
RTSBWN1451TSBWN1452TMBWN1453THB WN1423  
Note: there are some small dimensional differences between K-PT & EJOT head sizes.

Phones: (800) 638-1830 or (410) 358-3130 are available Monday-Friday 8:30 AM to 5:30 PM Eastern time.
Faxes: (800) 872-9329 or (410) 358-3142 & E-mail are available anytime.
Warehouse & showroom hours are Monday-Friday 10 AM to 5:30 PM.
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