98
81505
81503
61006
61015
62005
62015
61006
61015
62005
62015
NFPA100011
81520
81540
81503
81505
81520, 81505, 81540, 81503, 61006, 61015, NFPA100011, 62005, 62015
NFPA100011
81520
81540
SMC Rings
SMC is a Harken company. Its rings provide robust yet low-profile 
solutions for a wide range of applications. Originally designed for 
climbing and industrial work, multi-colored and anodized SMC 
Rings are increasingly applied in marine environments due to their 
reliability and high strength-to-weight ratios.
SMC Carabiners
SMC carabiners are a dependable choice for sailors 
seeking professional-grade hardware, for marine 
applications where secure, high-load connections are 
essential. They are available locking and non-locking, 
in both aluminum and steel.
Like our SMC Rings, these carabiners were originally 
designed for climbing and industrial work, but their 
versatility makes them effective for a wide range on 
board applications. Not intended for use in human 
suspension. Available only in USA. 
Part
No.
Description
Inside Ø
Outside Ø
Thickness
Weight
3 Sigma MBS
Max working load
in
mm
in
mm
in
mm
oz
g
lb
kN
lb
kN
Radius ring — orange
1.1
28
1.88
48
1/2/
12.7
1.2
35
8542
38
2136
9.5
Radius ring — blue
1.57
40
2.4
61
1/2/
12.7
1.6
46
8992
40
2248
10
Rigging ring — gray 
1.1
28
1.7
43
1/2/
12.7
0.9
26
7194
32
1799
8
Rigging ring — red
1.1
28
1.7
43
1/2/
12.7
0.9
26
7194
32
1799
8
Part
No.
Description
Dimensions
Gate opening
Weight
MBS 
Major axis (lb)
MBS 
Minor axis (lb)
Gate 
open (lb)
Option
in
mm
in
mm
oz
g
Force Oval — Bright
4.2 x 2.2
107 x 56
0.59
15
2.3
65
4946 (22kN)
1798 (8kN)
1349 (6kN)
Non-locking
Force Oval — Black
4.2 x 2.2
107 x 56
0.59
15
2.5
71
4946 (22kN)
1798 (8kN)
1349 (6kN)
Screwlock
Force D — Black
4.2 x 2.15
107 x 55
0.787
20
2.3
65
6969 (31kN)
2023 (9kN)
2023 (9kN)
Non-locking
Force D — Black
4.2 x 2.15
107 x 55
0.63
16
2.6
74
6969 (31kN)
2023 (9kN)
2023 (9kN)
Screw-lock
D — Bright 
4.52 x 2.70
115 x 69
0.94
24
6
170
7419 (33kN)
2248 (10kN)
1798 (8kN)
Screw-lock
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