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Cup Square Carriage bolts, also known as Coach bolts or Mushroom head bolts. Manufactured to DIN 603 in A2 (304) Stainless Steel. Please note that these are sold in multiples of 10 Carriage bolts are often used in timber construction. The square underneath the head jams in a drilled hole in the timber eliminating the need for a spanner or other tool to grip when tightening a nut to the other end. Alternatively, the square can be inserted into a square or slotted hole in a metal plate. Please note that the longest lengths of these may be part threaded, please contact us first if you have a certain requirement. Manufactured from A2 stainless steel these offer good corrosion resistance and are almost non magnetic.
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Bolt Base Ltd Delivery & Returns
UK Orders Orders placed by 1.00pm will be dispatched same day.
Shipping will be charged at a rate of £3.00 for second class and £3.95 for 1st class royal mail. Shipping will be free of charge on orders with a value over £50.00.
All UK orders will be sent by royal mail if selected at checkout, heavier and higher value orders may be sent by DHL.
Next day delivery is available for £7.99 and will be made by DHL or Royal mail Special Delivery. Orders must be received before 1.00pm. Next day delivery orders placed between 1.00pm Thursday and 1.00pm Friday will likely not arrive till Monday. Next day orders placed between 1.00pm Friday and 1.00pm Monday will be due for arrival on Tuesday.
Usual shipping time for royal mail 1st class is 1-3 working days but can sometimes take a little longer in some circumstances.
Returns We operate a 60 day return policy and try to keep things as simple as possible.
All goods should be returned to us in the same condition we sent them in and should always be unused, any returns we receive with signs that they have been used may be returned to the customer and a refund or exchange may be denied.
For goods that we have supplied correctly you are entitled to return these to us for a full refund (excluding any shipping paid) or an exchange if preferred. Please return goods to us either with original invoice or a photo copy so that we can identify your order. Please also include a note explaining what you would like us to do for you whether it is an exchange or refund. Please include a note even if already discussed by email or over the phone.
For goods that are faulty or have been incorrectly supplied we can offer a full refund including any shipping paid or an exchange if preferred. Please return goods to us either with original invoice or a photo copy so that we can identify your order. Please also include a note explaining what you would like us to do for you whether it is an exchange or refund. Please include a note even if already discussed by email or over the phone.
For all returns please make sure that you retain any proof of postage as we can not be held responsible for any returns that do not reach us.
All returns should be clearly marked and sent to: Bolt Base LTD Returns Unit 6A The Trade Center Bruce Street Alloa Clackmannanshire FK10 1RX UK
Please contact us for our Payment & Security policy.
Reference
Diameter
Head Diameter
Dome Height
Square Across Flats
Square Height
Thread Diameter
Thread Pitch
A2-Carriage12mmM5
M5
13.5mm
3.3mm
5.48mm
4.1mm
5mm
0.8mm
A2-Carriage12mmM6
M6
16.5mm
3.9mm
6.48mm
4.6mm
6mm
1.0mm
A2-Carriage16mmM8
M8
20.5mm
4.9mm
8.58mm
5.6mm
8mm
1.25mm
A2-Carriage16mmM10
M10
24.6mm
5.4mm
10.58mm
6.6mm
10mm
1.5mm
Specifications
A2-Carriage12mmM5
Diameter
M5
A2-Carriage12mmM5
Head Diameter
13.5mm
A2-Carriage12mmM5
Dome Height
3.3mm
A2-Carriage12mmM5
Square Across Flats
5.48mm
A2-Carriage12mmM5
Square Height
4.1mm
A2-Carriage12mmM5
Thread Diameter
5mm
A2-Carriage12mmM5
Thread Pitch
0.8mm
A2-Carriage12mmM6
Diameter
M6
A2-Carriage12mmM6
Head Diameter
16.5mm
A2-Carriage12mmM6
Dome Height
3.9mm
A2-Carriage12mmM6
Square Across Flats
6.48mm
A2-Carriage12mmM6
Square Height
4.6mm
A2-Carriage12mmM6
Thread Diameter
6mm
A2-Carriage12mmM6
Thread Pitch
1.0mm
A2-Carriage16mmM8
Diameter
M8
A2-Carriage16mmM8
Head Diameter
20.5mm
A2-Carriage16mmM8
Dome Height
4.9mm
A2-Carriage16mmM8
Square Across Flats
8.58mm
A2-Carriage16mmM8
Square Height
5.6mm
A2-Carriage16mmM8
Thread Diameter
8mm
A2-Carriage16mmM8
Thread Pitch
1.25mm
A2-Carriage16mmM10
Diameter
M10
A2-Carriage16mmM10
Head Diameter
24.6mm
A2-Carriage16mmM10
Dome Height
5.4mm
A2-Carriage16mmM10
Square Across Flats
10.58mm
A2-Carriage16mmM10
Square Height
6.6mm
A2-Carriage16mmM10
Thread Diameter
10mm
A2-Carriage16mmM10
Thread Pitch
1.5mm
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