Specification Sheet

Ø
o
Ø
i
T
NL3 ss-254
– N L 8 s s -25 4
Ø
i
± 0 ,1 m m
NL10 ss -254
– N L 3 9 s s - 2 5 4
Ø
i
±0,2 mm
NL3ss254
–NL24 s s -25 4
Ø
o
± 0,2 mm
NL27ss-254
–NL39ss-254
Ø
o
± 0,3 mm
NL3ss-254
–NL39ss-254
T ± 0,25 mm
N L 3 s s - 2 5 4 M3 0,5
0,8
1,5
1,1
2,0
NL4 ss-254 M4 0,7
1,8
2,6
2,4
3,4
N L 5 s s -25 4 M5 0,8
3,6
4,1
4,8
5,5
N L 6 s s -25 4 M6 1,0
6,3
5,9
8,4
7,8
N L 8 s s -25 4 M8 1,25
15
11
20
14
NL10 s s- 2 54 M10 1,5
30
17
39
23
NL12 ss- 254 M12 1,75
51
25
68
33
NL14 ss-254 M14 2,0
81
34
108
45
NL16 ss-254 M16 2,0
124
46
165
61
NL18 ss-254 M18 2,5
173
56
231
75
N L 20 s s -25 4 M20 2,5
243
72
323
95
N L 2 2 s s -25 4 M22 2,5
330 89 440 118
N L 24 s s-254 M24 3,0
418
103
557
137
N L 27 s s-2 5 4 M27 3,0
609
134
812
179
N L 3 0 s s - 2 5 4 M30 3,5
831
164
1108
219
NL36ss-254 M36 4,0
1444
239
1925
319
NL3ss-254
M3 #5 3,4 7,0 2,2 200 0,04
NL3,5ss-254
M3,5 #6 3,9 7,6 2,2 200 0,04
NL3,5spss-254
M3,5 #6 3,9 9,0 2,2 200 0,07
NL4ss-254
M4 #8 4,4 7,6 2,2 200 0,04
NL4spss-254
M4 #8 4,4 9,0 2,2 200 0,07
NL5ss-254
M5 #10 5,4 9,0 2,2 200 0,06
NL5spss-254
M5 #10 5,4 10,8 2,2 200 0,11
NL6ss-254
M6 6,5 10,8 2,2 200 0,09
NL6spss-254
M6 6,5 13,5
2,0
200 0,16
NL1/4"-254
1/4" 7,2 11,5 2,2 200 0,09
NL1/4"spss-254
1/4" 7,2 13,5 2,2 200 0,15
NL8ss-254
M8 5/16" 8,7 13,5 2,0 200 0,12
NL8spss-254
M8 5/16" 8,7 16,6 2,2 200 0,22
NL3/ 8"ss-254
3/8" 10,3 16,6 2,0 200 0,19
NL3/ 8"spss-254
3/8" 10,3 21,0 2,2 200 0,38
NL10ss-254
M10 10,7 16,6 2,0 200 0,18
NL10spss-254
M10 10,7 21,0 2,2 200 0,37
NL11ss-254
M11 7/16" 11,4 18,5 2,2 200 0,26
NL12ss-254
M12 13,0 19,5 2,0 200 0,23
NL12spss-254
M12 13,0 25,4
3,2
100
0,83
NL1/2"ss-254
1/2" 13,5 19,5
2,0
200 0,23
NL1/2"spss-254
1/2" 13,5 25,4
3,0
100 0,80
NL14ss-254
M14 9/16" 15,2 23,0 3,0 100 0,49
NL14spss-254
M14 9/16" 15,2 30,7
3,0
100
1,13
NL16ss-254
M16 5/8" 17,0 25,4 3,0 100 0,59
NL16spss-254
M16 5/8" 17,0 30,7 3,2 100 1,13
NL18ss-254
M18 19,5 29,0 3,2 100 0,80
NL18spss-254
M18 19,5 34,5 3,2 100 1,56
NL3/4"ss-254
3/4" 20,0 30,7
3,2
100 0,96
NL3/4"spss-254
3/4" 20,0 39,0 3,2 100 2,14
NL20ss-254
M20 21,4 30,7 3,0 100
0,83
NL20spss-254
M20 21,4 39,0 3,2 100 1,98
NL22ss-254
M22 7/8" 23,4 34,5 3,2 100 1,19
NL22spss-254
M22 7/8" 23,4 42,0 3,2 50 2,44
NL24ss-254
M24 25,3 39,0 3,2 100 1,65
NL24spss-254
M24 25,3 48,5 3,2 50 3,50
NL1"ss-254
1" 27,9 39,0 3,2 100 1,42
NL1"spss-254
1" 27,9 48,5
5,8
50
5,40
NL27ss-254
M27 28,4 42,0 5,8 50 3,10
NL27spss-254
M27 28,4 48,5 5,8 25
5,34
NL30ss-254
M30 1 1/8" 31,4 47,0 5,8 50 4,04
NL33ss-254
M33 1 1/4" 34,4 48,5 5,8 25
3,86
NL36ss-254
M36 1 3/8" 37,4 55,0 5,8 25
5,50
NL39ss-254
M39 1 1/2" 40,4 58,5 5,8 25 6,74
Nord-Lock 254 SMO
®
washers
EN 1.4547 or equivalent, surface hardened
Dimension chart
Thread friction coefficients have theoretical values but are verified
through testing. Under head friction coefficients have been established
by tests. Torque guidelines for other bolt grades are available through
your local Nord-Lock representative.
254 SMO
®
is a high performance austenitic stainless steel (according to EN 1.4547)
with greater mechanical strength and resistance against corrosion than most
austenitic stainless steel grades. The material is resilient against pitting and crevice
corrosion due to high contents of chromium, nickel, molybdenum and nitrogen.
Nord-Lock 254 SMO
®
washers are specially designed for chloride rich processes and
salt water solutions / atmospheres, i.e. environments where stainless steel washers
made of EN 1.4404 are not suitable.
Washer size Bolt size ø
i
[mm]
ø
o
[mm]
Thickness T
[mm]
Min.
package
[pairs]
Approx weight
kg / 100 pairs
Metric UNC
A4-70, Cu/C paste,
G
F
=65%, µ
th
= 0,13, µ
h
= 0 , 1 3
A 4 - 8 0 , C u / C p a s t e ,
G
F
=65%, µ
th
= 0,13, µ
h
= 0 , 1 3
Washer
size
Bolt
size
Pitch
[mm]
Torque
[Nm]
Clamp load
[kN]
Torque
[Nm]
Clamp load
[kN]
• Please consult our website for current dimensions and
2D / 3D CAD models: www.nord-lock.com/cad
11
Nord-Lock washers made of 254 SMO
®
quality are standard stock items,
yet subject to prior sale.
Cu/C paste =
Copper/graphite paste (Molykote
®
1000)
G
F
= ratio of yield point. When tightening according to guidelines
and with no deviation, this is the pre-stress achieved expressed as
% of yield point.
µ
th
= thread friction coefcient
µ
h
= under head friction coefcient
1 N = 0,225 lb
1 Nm = 0,738 ft-lb
Torque guidelines
Nord-Lock 254 SMO
®
washers with stainless steel bolt,
lubricated with copper/graphite paste (Molykote
®
1000).