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Key Clamps & Tube

Key Clamps & Tubes for all of your needs.

Fisher Alvin Key Clamps are are manufactured from high quality galvanised steel. We have a wide range of key clamps as well as galvanised steel tubing from our extensive stocks which have been specifically designed to meet an ever-increasing number of needs. Whether your requirement is for a steel handrail to run alongside a ramp or steps, or a guard rail to provide protection either in a hazardous area or from a height the key clamp system will give you exactly what you are looking for.

With an increasing number of new uses emerging for key clamps we also support a large number of shop fitters, interior designers, gardeners and farmers in the design and construction of many bespoke solutions – check out our new brochures »

Our Key Clamp Handrail Kits are the perfect solution for implementing any handrail requirement and are always held in stock ready for nationwide delivery.

A2 – SHORT TEE

Provides 90º ‘T’ connection between two tubes. Used for the joint between end post and lower rail(s) when handrail is straight and level. Also for a top ‘T’ joint on a guardrail. Cannot join tube in top of ‘T’, use the A4 when this is required.

# Ø A B
526.9 44 36
633.7 48 44
742.4 60 54
848.3 68 64
960.3 85 75

A3 – 30-60 DEGREE SOCKET TEE

# Ø A B
633.7 54 73
742.4 63 89
848.3 68 102

A4 – LONG TEE

Provides a 90º ‘T’ connection between two tubes. Used for the joint between a top rail and a vertical post. Allows tubes to be joined in the top part of the ‘T’. When used in guardrailing the A22 will compliment this for lower rail(s).

# Ø A B
526.9 88 44
633.7 96 48
742.4 120 60
848.3 136 68
960.3 170 85

A6 – 90 DEGREE ELBOW

This is a 90º elbow joint. Used frequently for the termination of the top rail to the last post of a handrail. Also used for turning the rails around a 90º corner.

# Ø A
526.9 44
633.7 48
742.4 60
848.3 68
960.3 86

A7 – ELBOW

Two tubes can be joined with an angle range of between 105º - 165º. Joins the angled rail from a ramp or steps to level rails on a landing. Starts an angled rail from top of a first post. Can be used for obtuse angle change in a handrail.

# Ø A
633.7 90
742.4 106
848.3 120

A8 – EXTERNAL CONNECTOR

Provides a rigid joint for two tubes of the same diameter. Joints to be 150mm to the nearest support. Do not use for joining two tubes subject to extreme loads, i.e. a vertical post member supporting a guardrail. Use A9 for a streamline joint.

# Ø A
526.9 64
633.7 90
742.4 96
848.3 96
960.3 125

A9 – INTERNAL CONNECTOR

Provides a streamline flush joint in two tubes of the same dia. with a max. wall thickness 3.2 mm. Joints to be 150mm to the nearest support. Not for joining tubes that are subject to extreme loads, or where a direct tensile load is applied.

# Ø A B
633.7 78 20
742.4 78 20
848.3 80 22

A10 – WALL FLANGE

A four holed plate providing a rigid fixing for handrails that terminate on walls. Ideal for securing garment railing structures to ceilings etc. Not to be used as structural fixings for supporting a vertical post on guardrails. Use A12 for this.

# Ø A B C D E
526.9 63 48 81 6 4
633.7 65 48 84 6 4
742.4 75 51 98 8 6
848.3 85 54 112 8 6
960.3 96 60 130 11 6

A11 – KICK PLATE BASE PLATE

Specific base plates designed for either 42.4mm or 48.3mm that will fix directly to the floor but will also accept a standard kick plate to the base. Has a number of applications but is particularly popular for fixed hand rail systems on roof or mezzanine areas where there is a need to avoid the drop of hazardous materials or tools from above

# Ø A B
742.4 60 54
848.3 68 64

A12- BASE PLATE

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)

# Ø A B C D E F
526.9 112 76 64 76 11 8
633.7 128 88 80 88 11 10
742.4 144 102 80 88 14 10
848.3 156 117 92 88 14 10
960.3 165 120 98 130 14 18

A14 – RAILING VERTICAL SIDE SUPPORT

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.

# Ø

A15 – SIDE PALM FIXING

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.

# Ø

A16 – RAILING HORIZONTAL SIDE SUPPORT

Provides a structural base plate as the A14, should not be used for heavy duty applications.

# Ø

A17 – GROUND SOCKET

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.

# Ø A B
633.7 126 125
742.4 140 135
848.3 140 138

A18 – TOP CORNER TEE

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.

# Ø A
526.9 44
633.7 48
742.4 60
848.3 68
960.3 85

A20 – MID CORNER TEE

A 90º corner joint, tube passes through the central hole. Used frequently for a lower rail(s). Often used in conjunction with the A18.

# Ø A
526.9 44
633.7 48
742.4 60
848.3 68
960.3 85

A21 – SHORT SWIVEL TEE

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.

# Ø A
633.7 58
742.4 73
848.3 81

A22 – CROSS TEE

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.

# Ø A
526.9 88
633.7 96
742.4 120
848.3 136
960.3 175

A23 – ADJUSTABLE TWO SOCKET CROSS

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.

# Ø A
742.4 146
848.3 178

A24 – THREE SOCKET CROSS

Frequently used to tie uprights with horizontal tubes in three directions all at 90º to the upright.

# Ø A B
526.9 88 44
633.7 96 48
742.4 120 60
848.3 136 68
960.3 176 88

A26 – FOUR SOCKET CROSS

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.

# Ø A B C
526.9 32 82 82
633.7 43 96 96
742.4 48 120 120
848.3 50 136 136
960.3 54 175 175

A27 – VARIABLE ELBOW

Variable Elbow that allows two horizontal tubes to be connected and an angle created that is either greater or less than the standard 90 degrees

# Ø A B
633.7 48 44
742.4 60 54
848.3 68 64

A28 – CROSS OVER

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.

# Ø A B
526.9 36 32
633.7 42 40
742.4 54 49
848.3 60 54
960.3 62 68

A30 – SOCKET TEE & CROSSOVER

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.

# Ø A B C
526.9 31 35 41
633.7 42 40 48
742.4 54 49 60
848.3 60 54 68
960.3 62 68 86

A31 – SWIVEL TEE

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.

# Ø A B C
633.7 56 33 33
742.4 62 42 36
848.3 72 48 41

A32 – CLAMP ON TEE

Used for adding to and modifying an existing structure. Similar to the A2.

# Ø A
526.9 50
633.7 54
742.4 64
848.3 74
960.3 90

A34 – HANDRAIL BRACKET

Used to carry handrails along walls or fix structures back to walls. Tube passes through in long lengths, can be joined using the A8 or A9. Can be slid down a post and used for connecting a kick plate. Also for fixing hoardings, signs etc.

# Ø A B C D E F
526.9 76 57 55 45 8 5
633.7 92 65 58 48 10 10
742.4 112 84 60 48 10 10
848.3 112 80 68 54 10 10

A35 – HANDRAIL BRACKET

This clamp is a variant of the A38 where the flange is flush with the edge of the clamp. This allows the user to attach sheets of wood metal or glass to a structure without the need to cut it to fit within the tubes. Typical uses include fixings for kick-boards, steps and work surfaces

# Ø A B
633.7 86 120
742.4 95 130
848.3 104 140

A36 – MALE SWIVEL

This is a part component of the A44. It can be used on its own for the insertion of signs and hoardings within a tubular frame, the connection of chain and ‘D’ shackles and tensioning of yachting wire balustrades etc.

# Ø A B C
526.9 56 39 10
633.7 66 39 10
742.4 75 45 10
848.3 75 45 10
960.3 100 50 10

A37 – SINGLE FIXING PAD

This clamp is a variant of the A36 where the flange is flush with the edge of the clamp. This allows the user to attach sheets of wood metal or glass to a structure without the need to cut it to fit within the tubes. Typical uses include fixings for kick-boards, steps and work surfaces

# Ø A B
633.7 60 43
742.4 66 48
848.3 70 52

A38 – DOUBLE MALE SWIVEL

Similar to the A36 but with two eyelets. This is a part component of the A46.

# Ø A B C
526.9 112 38 10
633.7 123 43 10
742.4 134 47 10
848.3 142 51 10
960.3 160 56 10

A40 – 90 DEGREE CORNER MALE SWIVEL

Similar to the A38 but the two eyelets are at 90º. This is a part component of the A48.

# Ø A B
526.9 38 10
633.7 46 10
742.4 48 10
848.3 54 10

A42 – FEMALE SWIVEL

Not generally used on their own. They are a part component of the A44, A46, A48 & A52.

# Ø A B C D
526.9 59 23 10 9
633.7 61 25 10 12
742.4 70 25 10 12
848.3 77 25 10 12
960.3 94 36 10 12

A44 – SINGLE SWIVEL COMBINATION

A flexible variable angle connector. Used for an angled top rail connection to a post. Use if the angle required is not known. Also used as bracing struts for racking etc. Reducing combinations are available throughout the size range.

# Ø A B C
526.9 34 25 56
633.7 36 25 66
742.4 45 25 75
848.3 53 25 75
960.3 58 36 100

A46 – DOUBLE SWIVEL COMBINATION

A flexible variable connection used for an angled lower rail(s) joint to a post. Changes horizontal rails to angled rails at top of ramp/stairs. Also as bracing struts for racking. Reducing combinations available throughout the size range.

# Ø A B C
526.9 38 25 26
633.7 43 25 36
742.4 47 25 45
848.3 51 25 53
960.3 56 36 58

A48 – 90 DEGREE SWIVEL COMBINATION

A 90º flexible variable angled connector for posts on a corner. Changes horizontal rails to angled rails, at the top of a ramp/stairs. Use as bracing struts for racking etc. Reducing combinations available throughout the size range.

# Ø A B C
526.9 25 61 99
633.7 25 61 107
742.4 25 70 118
848.3 25 78 132

A50 – SWIVEL BASE

A part component of the A52. Used on its own it is ideal for a wall fixing for a chain attachment with a ‘D’ shackle. Can be used to take steel straining wires etc. Can be fixed to floor to provide fixing point for mesh panels/kick plates.

# Ø A B C D E F
526.9 40 84 116 54 12 48
633.7 40 84 116 54 12 48
742.4 40 84 116 54 12 48
848.3 40 84 116 54 12 48
960.3 40 84 116 54 12 48

A52 – BASE SWIVEL COMBINATION

Used for an angled wall fixing plate or a strut for added strengthening of a post. Not to be used as an angled base plate. Consider the G12. Alternatively use A12 and bend the vertical tube to the upright position.

# Ø A B C D
526.9 40 34 25 10
633.7 40 36 25 10
742.4 40 45 25 10
848.3 40 53 25 10
960.3 40 58 36 10

A58 – COLLAR

Used for the added support of a clamp that may be subject to severe loading, in excess of the maximum permitted slip load of it's socket set screws, on racking etc. Can support another clamp, which doesn't have it's socket screw tightened.

# Ø A
526.9 22
633.7 25
742.4 25
848.3 25

A60 – GATE EYE

Used in conjunction with the A62 for a gate hinge assembly.

# Ø A B C
526.9 30 12 25
633.7 33 12 27
742.4 37 13 27
848.3 40 13 27

A62 – GATE HINGE

Used in conjunction with the A60 for a gate hinge assembly.

# Ø A B C D
526.9 25 34 11 30
633.7 27 34 11 33
742.4 27 38 12 37
848.3 27 38 12 40

A64 – HOOK

This clamp is generally used on a vertical post where chain is connected for an access opening in a guardrail. The chain is easily removed from the A64, use an A36 and a ‘D’ shackle for the opposite end connection.

# Ø A B C
526.9 25 32 20
633.7 25 34 24
742.4 25 39 24
848.3 25 41 24

A66 – CLAMP ON CROSSOVER

This clamp can be added to an existing structure. It provides a 90º crossover connection and is an alternative to the A28 but is available in more reducing size variations. It is of mild steel manufacture.

# Ø A B C D
526.9 35 27 27 27
633.7 42 34 34 34
742.4 50 42 42 42
848.3 56 48 48 48

A68 – PLASTIC END CAP

These plastic caps are used to plug the ends of the tubing. Once in position they are extremely difficult to remove.

# Ø A
526.9 1
633.7 1
742.4 1
848.3 1
960.3 1

A70 – SINGLE MESH CLIP

Used to retain mesh panels within a guardrail. Used without the ‘horseshoe’ end they can secure other types of infill with a max. thickness of 10mm, such as perspex/plywood. Can be added to an existing structure. Space 450mm apart.

# Ø A B C D
526.9 68 58 68 58
633.7 71 61 71 61
742.4 75 65 75 65
848.3 78 68 78 68
960.3 76 66 76 66

A72 – DOUBLE MESH CLIP

Used to retain mesh panels within a guardrail. Used without the ‘horseshoe’ end they can secure other types of infill with a max. thickness of 10mm, such as perspex/plywood. Can be added to an existing structure. Space 450mm apart.

# Ø A B C D
526.9 68 58 68 58
633.7 71 61 71 61
742.4 75 65 75 65
848.3 78 68 78 68
960.3 76 66 76 66

A76 – HEX KEY

Hex-key for fitting A78 socket screws

# Ø A
526.9 26
633.7 33
742.4 42
848.3 48
960.3 60

A78 – GRUBB SCREW

Electro-plated case hardened socket screws. Two different thread sizes and some are slightly longer than others. Clamps are supplied with these fitted. If spares or replacements are required please provide type and size of clamp they are required for.

# Ø A
526.9 1
633.7 1
742.4 1
848.3 1
960.3 1

G2 – GRADIENT SHORT TEE

Used for the joint between the end post and the lower rail(s). Also can be used for the top ‘T’ joint. Tube cannot be joined in the top part of the ‘T’ use the G4 when this is required.

# Ø A B
742.4 68 64
848.3 68 64

G4 – GRADIENT LONG TEE

Used for the joint between the top rail and vertical post. Allows tubes to be joined in the top part of the ‘T’. Use the G22 to compliment this for the lower rail(s).

# Ø A B
742.4 144 76
848.3 144 76

G6 – GRADIENT ELBOW

Used for the termination of the top rail to the vertical post at the starting point of the incline.

# Ø A
742.4 68
848.3 68

G12 – GRADIENT BASE PLATE

Provides a structural base plate for the vertical post. Due to the design this base plate can only be fixed down with the fixing holes in line with the applied load (i.e.90º to the rails.)

# Ø A B C D E F
742.4 152 112 92 88 14 10
848.3 152 112 92 88 14 10

G22 – GRADIENT CROSS TEE

Used for the connection of lower rail(s) to an intermediate vertical post, the vertical post must remain continuous while the rails are joined in each side of the clamp. Complimented with the G4 for the top rail connection.

# Ø A B
742.4 68 64
848.3 68 64

ANC – ANCHOR BOLT

Through bolt for A12 and G12 Base

# Ø A
633.7 10
742.4 10
848.3 12
960.3 12

RK-RMS

Railing Mid Section

# Ø A B
742.4 550 1100
848.3 550 1100

RK-RDS

End 'D' Section

# Ø A B
742.4 550 1100
848.3 550 1100

RK-RES

Railing End Section

# Ø A B
742.4 550 1100
848.3 550 1100

RK-R90

90 Degree Corner Section

# Ø A B
742.4 550 1100
848.3 550 1100

RK-HRP

Pair of horizontal rails 1450mm each 48.3mm o/d, & 1250mm each 42.4mm o/d.

# Ø A
742.4 1250
848.3 1450

RK-A10

Pair of A10 wall termination brackets.

# Ø A B C D E
742.4 85 54 112 11 6
848.3 85 54 112 11 6

DDA09 – INTERNAL VARIABLE ELBOW

Variable angle, used in conjunction with a pair of A9-7's. DDA compliant.

# Ø A
742.4 1

DDA725 – INTERNAL 90 DEGREE ELBOW

90° elbow to suit 42.4mm - medium weight tube.

# Ø A
742.4 1

DDA745 – DDA WALL BRACKET

Wall bracket, DDA compliant and can be used at any angle.

# Ø A
742.4 1

DDA746 – SADDLE WALL BRACKET

DDA compliant handrail bracket used in conjunction with A6-7 or A2-7.

# Ø A
742.4 1

DDA747 – DDA HANDRAIL BRACKET

DDA compliant handrail bracket used in conjunction with A6-7 or A2-7.

# Ø A
742.4 1

DDA748 – SADDLE HANDRAIL BRACKET

DDA compliant handrail bracket used in conjunction with A6-7 or A2-7.

# Ø A
742.4 1

DDA797 – O RING

Optional sealing ring, to obtain the best finish when using DDA range.

# Ø A
742.4 1

Tube 3.2m

# Ø A
526.9 3200
633.7 3200
742.4 3200
848.3 3200
960.3 3200

Tube 6.4m

# Ø A
526.9 6400
633.7 6400
742.4 6400
848.3 6400
960.3 6400

Braked Castor Wheel

Optional sealing ring, to obtain the best finish when using DDA range.

# Ø A
633.7 75

CA03 – AD ON SHORT TEE

The Add On Short Tee allows existing structures to be added to without the need for any dismantling. Tubes must not be jointed within this fitting.

# Ø A B
742.4 60 55
848.3 68 60

CA03

C05A – VARIABLE ELBOW 11° TO 30°

The Key Clamp C05A Variable Elbow fitting is designed to make joints at an angle of between 15° and 60°.

# Ø A B C D
742.4 84 84 16 92
848.3 94 94 16 102

C07 – 45° TEE

The 45° Tee is used as a bracing and strut component for strengthening structures.

# Ø A
633.7 45
742.4 54
848.3 60

CA40 – AD ON 90° CROSSOVER

The Add On 90° Crossover Key Clamp allows existing structures to be added to without the need for any dismantling. This fitting is designed to give a 90° offset crossover joint. Tubes must not be joined within this fitting

# Ø A B
742.4 49 46
848.3 55 50

C14 – RAILING HORIZONTAL SIDE SUPPORT

The Railing Horizontal Side Support is designed to provide a base for railings and other structures that need a side mounted fixing.

# Ø A B C
633.7 90 30 12
742.4 90 35 12
848.3 90 41 15