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.
Used for a 90º connection of a lower rail(s) to an intermediate vertical post, the vertical post must remain continuous while the rail is joined in each side of the clamp. Usually complimented with the A4 when used for guardrailing.
| Tube |
Ø |
A |
B |
C |
D |
E |
F |
| 5 |
26.9 |
88 |
|
|
|
|
|
| 6 |
33.7 |
96 |
|
|
|
|
|
| 7 |
42.4 |
120 |
|
|
|
|
|
| 8 |
48.3 |
136 |
|
|
|
|
|
| 9 |
60.3 |
175 |
|
|
|
|
|
Variable angle clamp enables tubes to be connected between angles 30º - 45º. Used for angled lower rail(s) joint to a vertical post on stairs. A3 can be used in association for top rail connection. A46 swivel clamp is an alternative.
| Tube |
Ø |
A |
B |
C |
D |
E |
F |
| 7 |
42.4 |
146 |
|
|
|
|
|
| 8 |
48.3 |
178 |
|
|
|
|
|
| 9 |
60.3 |
216 |
|
|
|
|
|
Frequently used to tie uprights with horizontal tubes in three directions all at 90º to the upright.
| Tube |
Ø |
A |
B |
C |
D |
E |
F |
| 5 |
26.9 |
88 |
44 |
|
|
|
|
| 6 |
33.7 |
96 |
48 |
|
|
|
|
| 7 |
42.4 |
120 |
60 |
|
|
|
|
| 8 |
48.3 |
136 |
68 |
|
|
|
|
| 9 |
60.3 |
176 |
88 |
|
|
|
|
Frequently used in structures that have many uprights, such as racking. This clamp ties a centre upright, which passes through the central hole, with four horizontal tubes. All connections are at 90º to each other.
| Tube |
Ø |
A |
B |
C |
D |
E |
F |
| 5 |
26.9 |
32 |
82 |
82 |
|
|
|
| 6 |
33.7 |
43 |
96 |
96 |
|
|
|
| 7 |
42.4 |
48 |
120 |
120 |
|
|
|
| 8 |
48.3 |
50 |
136 |
136 |
|
|
|
| 9 |
60.3 |
54 |
175 |
175 |
|
|
|
Gives 90º crossover joint. Used in guardrail installations. Rails are passed through in long lengths and joined using the A8 or A9. Can be used for connection of a horizontal racking member to a vertical support, garment rails etc.
| Tube |
Ø |
A |
B |
C |
D |
E |
F |
| 5 |
26.9 |
36 |
32 |
|
|
|
|
| 6 |
33.7 |
42 |
40 |
|
|
|
|
| 7 |
42.4 |
54 |
49 |
|
|
|
|
| 8 |
48.3 |
60 |
54 |
|
|
|
|
| 9 |
60.3 |
62 |
68 |
|
|
|
|
This clamp is used on racking for the 90º connection of a vertical support to a horizontal load carrying rail. The rear outlet is available for a horizontal tie across the section.
| Tube |
Ø |
A |
B |
C |
D |
E |
F |
| 5 |
26.9 |
31 |
35 |
41 |
|
|
|
| 6 |
33.7 |
42 |
40 |
48 |
|
|
|
| 7 |
42.4 |
54 |
49 |
60 |
|
|
|
| 8 |
48.3 |
60 |
54 |
68 |
|
|
|
| 9 |
60.3 |
62 |
68 |
86 |
|
|
|
Offset handrail spigot clamp accepts tube through top of the ‘T’, the spigot inserts directly into another clamp. Used for off setting rail from a post, can be rotated through 360°. Used with A6 and A2. Also use with A10 for wall mounted rail.
| Tube |
Ø |
A |
B |
C |
D |
E |
F |
| 6 |
33.7 |
56 |
33 |
33 |
|
|
|
| 7 |
42.4 |
62 |
42 |
36 |
|
|
|
| 8 |
48.3 |
72 |
48 |
41 |
|
|
|
Used for adding to and modifying an existing structure. Similar to the A2.
| Tube |
Ø |
A |
B |
C |
D |
E |
F |
| 5 |
26.9 |
50 |
|
|
|
|
|
| 6 |
33.7 |
54 |
|
|
|
|
|
| 7 |
42.4 |
64 |
|
|
|
|
|
| 8 |
48.3 |
74 |
|
|
|
|
|
| 9 |
60.3 |
90 |
|
|
|
|
|
