Key Clamps
Alvin Key Clamps are distributed worldwide from our extensive stocks. All Fisher Alvin products are manufactured to the highest quality using the finest materials and the most modern plant and machinery. Fisher Alvin has been manufacturing Alvin key clamps for over fifty years.
Please note that our ‘stock tube’ is of a galvanised finish, the black tube is shown for illustrative purposes only, we do offer a powder coating option if this is required.
Provides a structural base plate for the support of a vertical post typically for a guardrail. Two socket set screws give a rigid structural fixing. Recommended that the fixing down bolts be in line with the applied load.(i.e 90º to the rails)
| Tube |
Ø |
A |
B |
C |
D |
E |
F |
| 5 |
26.9 |
112 |
76 |
64 |
76 |
11 |
8 |
| 6 |
33.7 |
128 |
88 |
80 |
88 |
14 |
10 |
| 7 |
42.4 |
144 |
102 |
80 |
88 |
14 |
10 |
| 8 |
48.3 |
156 |
117 |
92 |
88 |
14 |
10 |
| 9 |
60.3 |
165 |
120 |
98 |
130 |
14 |
18 |
Base for vertical posts for side mounting. Posts stand off from structure. Tube cannot pass through this clamp. Access to top fixing hole restricted, a threaded stud type bolt projecting a max. 25mm from structure needs to be fixed first.
| Tube |
Ø |
A |
B |
C |
D |
E |
F |
| 6 |
33.7 |
104 |
64 |
66 |
44 |
98 |
14 |
| 7 |
42.4 |
114 |
64 |
79 |
50 |
112 |
14 |
| 8 |
48.3 |
120 |
64 |
86 |
60 |
124 |
14 |
Provides a structural base plate to a vertical post that is required to be side mounted. This clamp is virtually flush to structure it is being fixed to. The tube does not pass through the clamp.
| Tube |
Ø |
A |
B |
C |
D |
E |
F |
| 6 |
33.7 |
63 |
25 |
71 |
11 |
24 |
6 |
| 7 |
42.4 |
72 |
23 |
82 |
11 |
28 |
6 |
| 8 |
48.3 |
73 |
23 |
82 |
11 |
31 |
6 |
Provides a structural base plate as the A14, should not be used for heavy duty applications.
| Tube |
Ø |
A |
B |
C |
D |
E |
F |
| 6 |
33.7 |
114 |
64 |
24 |
66 |
98 |
14 |
| 7 |
42.4 |
114 |
64 |
27 |
72 |
104 |
14 |
| 8 |
48.3 |
120 |
64 |
30 |
81 |
114 |
14 |
A ground socket that is cast into concrete and is flush with the finished ground level. Allows posts to be inserted and retained with a locking set screw. Posts can be easily removed at any time.
| Tube |
Ø |
A |
B |
C |
D |
E |
F |
| 6 |
33.7 |
126 |
125 |
|
|
|
|
| 7 |
42.4 |
140 |
135 |
|
|
|
|
| 8 |
48.3 |
140 |
138 |
|
|
|
|
Provides a three way 90º corner joint. Used frequently for a top rail 90º turn where a post is present. Compliment this with A20 for a lower rail. Also used for corner joints on structures such as work benches, tables etc.
| Tube |
Ø |
A |
B |
C |
D |
E |
F |
| 5 |
26.9 |
44 |
|
|
|
|
|
| 6 |
33.7 |
48 |
|
|
|
|
|
| 7 |
42.4 |
60 |
|
|
|
|
|
| 8 |
48.3 |
68 |
|
|
|
|
|
A 90º corner joint, tube passes through the central hole. Used frequently for a lower rail(s). Often used in conjunction with the A18.
| Tube |
Ø |
A |
B |
C |
D |
E |
F |
| 5 |
26.9 |
44 |
|
|
|
|
|
| 6 |
33.7 |
48 |
|
|
|
|
|
| 7 |
42.4 |
60 |
|
|
|
|
|
| 8 |
48.3 |
68 |
|
|
|
|
|
| 9 |
60.3 |
85 |
|
|
|
|
|
Generally used in pairs (as shown). Allows angles between 90º - 180º. Used to change direction of rails in the same plane. Requires a central tube at the point of angle change. Consider the A7 as an alternative for the angle change.
| Tube |
Ø |
A |
B |
C |
D |
E |
F |
| 6 |
33.7 |
58 |
|
|
|
|
|
| 7 |
42.4 |
73 |
|
|
|
|
|
| 8 |
48.3 |
81 |
|
|
|
|
|
