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Please refer to the table below for  the hexagon key sizes for metric cap screws, countersunk socket screws and grub screws. Please scroll down the page if you wish to purchase a correct size key, or a hexagon ball-end driver (screw driver with ground ball/hexagon end allowing fast off centre driving). Metric and inch sizes are listed

Below is also listed our telescopic magnetic probes - ideal for retrieving fasteners from hard to get places

It is essential to use the correct key size for driving cap screws and grub screws etc. In particular, when tightening the smaller sizes of grub screws, using an incorrect key (which may appear to be the correct size before higher torques are applied ) can lead to rounding off of the hexagon socket making removal or further tightening extremely difficult if not impossible.  

This information is supplied in good faith and is correct to the best of our knowledge.

Inch size keys for our BA and UNC socket cap screws range are also available below.

PLUS TOP QUALITY NUT SPINNERS FOR FAST TIGHTENING OF HEXAGON BOLT HEADS AND NUTS - SEE BOTTOM OF THIS PAGE

TEE HANDLE DRIVERS AND FOLD-UP ALAN KEY SETS ALSO NOW STOCKED IN A SELECTION OF SIZES

NEW PRODUCT - WE NOW STOCK SETS OF PIN-VICES (sometimes known as hand vices or hand chucks) - EXCELLENT FOR FINE HAND DRILLING, HOLDING SOLDER WIRE AND HOLDING BINDING WIRE ETC.

Please scroll to the bottom of this page or click HERE

A/F is the dimension across opposite flat sides of the hexagon key in millimetres and is the nominal key size.

Socket Cap Screws Grub Screws Countersunk Cap & Button Head Screws
(Metric) (Metric) (Metric)
Thread A/F (mm) Thread A/F (mm) Thread A/F (mm)
M1.6 1.5   M1.6 0.7   - -
M2 1.5 M2 0.9 M2 / M2.3 1.3
M2.5/ 2.6 2 M2.5 1.3 M2.5 1.5
M3 2.5 M3 1.5 M3 2
M3.5* 2.5        
M4 3 M4 2.0 M4 2.5
M5 4 M5 2.5 M5 3
M6 5 M6 3 M6 4
M8 6   M8 4   M8 5
M10 8 M10 5 M10 6

* M3.5x50mm cap screws require a 2.8mm A/F hex key.

 

Sizes for BA and UNC below have been converted from inches

Socket Cap Screws   Grub Screws   Socket Cap Screws   Grub Screws
(BA)   (BA)   (UNC)   (UNC & UNF)
Thread A/F (mm)   Thread A/F (mm)   Thread A/F (mm)   Thread A/F (mm)
                     
2BA 4.0 (5/32")   2BA 2.4 (3/32")   No 2 2.0 (5/64")   No 2 0.9
4BA 2.4 (3/32")   3BA 2.0 (5/64")   No 3 2.0 (5/64")   No 4 1.3(0.05")
6BA 2.0 (5/64")   4BA 1.6 (1/16")   No 4 2.4 (3/32")   No 5 1.6 (1/16")
8BA 1.6 (1/16")   6BA 1.3 (0.05")   No 5 2.4 (3/32")   No 6 1.6 (1/16")
            No 6 2.8 (7/16")   No 8 2.0 (5/64")
            No 8 3.6 (9/64")   No 10 2.4 (3/32")
            No 10 4.0 (5/32")   1/4 3.2 (1/4")
            1/4 4.75 (3/16")        

We can supply hexagon keys to suit the above sizes :- or scroll down the page for hex-ball drivers

All prices include 17.5% VAT  Click here for details

  Single Hexagon Keys 

Hardened steel 'L' form wrenches - black finish

See below for Hexagon Key Sets

A/F dim

 Length (mm)

Pack Qty

MF Ref

Price   You can enter/change the number of items on the order form
(nom key size)
0.7 30 1 MF-HK-07 £0.50

0.9 38 1 MF-HK-09 £0.50

1.3 41 1 MF-HK-13 £0.50

1.5 45 1 MF-HK-15 £0.50

1.6 45 1 MF-HK-16 £0.50

2.0* 50 1 MF-HK-20 £0.50

2.4 50 1 MF-HK-24 £0.50

2.5 56 1 MF-HK-25 £0.50

2.8 56 1 MF-HK-28 £0.50

3 63 1 MF-HK-30 £0.50

3.6 63 1 MF-HK-36 £0.50

4 70 1 MF-HK-40 £0.60

4.75 80 1 MF-HK-475 £0.60

5 80 1 MF-HK-50 £0.60

* For 2mm A/F sockets, we also stock 85mm long reach allen keys, hexagon ball-end screwdrivers, and bit inserts for electric and manual socket screw drivers. 

For these items please go to our servo screw page.

If the size you require isn't listed please e mail us for a no-obligation quotation.

Imperial (inch) sizes also available on application

All prices include 17.5% VAT  Click here for details

Metric & Inch sizes Fold-Up Hexagon ('Allen') key sets

Bondhus high quality fold up allen keys mounted in a soft feel ergonomic case.
Keys can be opened through a full 180 degree arc, which enables continuous driving in tight spots without the need to continuously re-insert the key.
Type

Hex sizes included

MF Ref

Price You can enter/change the number of items on the order form
Each 
         
Metric 1.5,2,2.5,3,4,5,6mm MF-BFK-10 £4.95

(Red handle)
     
Inch

0.05, 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 3/16"

MF-BFK-20 £4.95

(Yellow handle)
 

All prices include 17.5% VAT  Click here for details

   P

Picture is typical - colours and style may vary

 Metric Hexagon Ball-Drivers

 Bondhus high quality tools for fast off-centre driving of Metric grub and cap screws

A/F dim

 Blade 

Handle

MF Ref

Price You can enter/change the number of items on the order form
(mm) length (mm) Length (mm) Each 
           
1.5 65 55 MF-BD-15 £2.45

2.0 70 55 MF-BD-20 £2.45

           
2.5 80 60 MF-BD-25 £2.45

3.0 85 85 MF-BD-30 £2.45

Set of 3 (1.5, 2.0, and 2.5mm A/F) MF-BD-40 £6.38

Set of 4 (1.5, 2.0, 2.5 and 3.0mm A/F) MF-BD-50 £8.10

           
Set of 6 (1.5, 2.0, 2.5, 3, 4, and 5mm A/F)
Supplied in a tough plastic pouch with reinforced hanging eyelet
MF-BD-55 £13.50

 

   P

Picture is typical - colours and style may vary

 Imperial (Inch sizes) Hexagon Ball-Drivers

Bondhus high quality tools for fast off-centre driving of UNC and BA grub screws and cap screws

A/F dim

 Blade 

Handle

MF Ref

Price You can enter/change the number of items on the order form
inches (mm) length (mm) Length (mm) Each 
           
0.05" (1.27) 60 44 MF-BD-60 £2.45

           
1/16" (1.6) 64 54 MF-BD-62 £2.45

5/64" (1.98) 68 54 MF-BD-64 £2.45

           
3/32 (2.4) 70 62 MF-BD-66 £2.45

           
7/64"" (2.8) 75 62 MF-BD-68 £2.45

           
9/64" (3.6) 82 88 MF-BD-70 £2.45

5/32" (4.0) 90 108 MF-BD-72 £2.45

           
Set of 4 (0.05", 1/16", 5/64" and 3/32" A/F) MF-BD-80 £8.10

           
Set of 3 (7/64", 9/64", and 5/32" A/F) MF-BD-90 £6.45

           

Set of 8 (0.05, 1/16, 5/64, 3/32, 7/64, 1/8, 9/64 & 5/32 inch A/F)

Supplied in a tough plastic pouch with reinforced hanging eyelet
MF-BD-95 £16.90

           

Metric Tee Handle Hex Drivers
Bondhus high quality tee handle hexagon drivers
Soft feel handles with steel core
Hex`size

Shaft

Handle

MF Ref

Price You can enter/change the number of items on the order form
(A/F) mm length (mm) Length (mm) Each 
           
2.0 135 80 MF-TH-20 £4.95

           
2.5 155 80 MF-TH-25 £4.95

 
3.0 185 80 MF-TH-30 £4.95

           
Set of 3 See above 80 MF-TH-60 £13.35

2, 2.5 & 3.0mm
           

   

 Magnetic Pick-up 'Pen'

 Extendable, for retrieving small fixings from those hard to reach places. retracts to the size of a ball point pen

Strong magnetic tip - will hold upto 2 Ibs ! Price each only £1.50

Extends to 25" (625mm), retracts to 5" (127m)

 

Nut Spinners

 'King Dick' professional quality socket ended drivers for hexagon bolt heads and nuts. Large grip soft feel handles with chrome vanadium shafts. Handle has through hole for storage on a tool rack.

Not the cheapest, but probably the best. These are top quality tools that will last for years and should not be compared with 'market stall quality' tools.

A/F dim

For metric

Overall

MF Ref

Price You can enter/change the number of items on the order form
(mm) size Length (mm) Each 
           
4 M2 (not nyloc nuts) 210 MF-NS04 £6.45

8BA
           
4.5 M2 nyloc nuts only 210 MF-NS045 £6.95

 
5 M2.5 220 MF-NS05 £6.95

6BA
2UNC
           
5.5 M3 220 MF-NS055 £6.95

           
6 M3.5 220 MF-NS06 £6.95

           
7 M4 220 MF-NS07 £7.45

           
8 M5 230 MF-NS08 £7.90

5UNC
           
10 M6 230 MF-NS10 £8.60

           

  

 Pin Vices

A set of 4 all steel construction pin vices giving an overall clamping range of 0 to 4.5mm diameter

These tools are excellent for clamping small drills for hand drilling of small holes where access is difficult and a power tools isn't practical.

Shafts are hollow so wire etc can pass all the way through.
Supplied in a plastic wallet

Clamping Range in the set (mm)

Approx Length (mm) MF Ref Price per set You can enter/change the number of items on the order form
0-1 mm 85 MF-PVS4 £9.80

0.75-1.5 mm  88
1.5-3.0 mm 88
3.0 - 4.5 mm 102

This page was last modified on : January 20, 2010

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