Machine Screws Bolts M5 Countersunk

Machine Screws Bolts M5 Countersunk

SKU: MG-60345-
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Product Name Price Qty
Machine Screw Countersunk Head M5 x 25mm (pack 4)
(In Stock)
£1.80
Machine Screw Countersunk Head M5 x 40mm (pack 4)
(In Stock)
£1.80
Machine Screw Countersunk Head M5 x 50mm (pack 4)
(In Stock)
£2.60
Product Description
Details

Pan Head M5 Machine screws/bolts made from marine grade A4 stainless steel supplied with standard nuts and washers

Product Questions

Product Questions

How are screws and bolts measured - what size do I need?

Most dinghy/small boat fittings have either a 4mm fixing hole or a 5mm fixing hole. Screws (self tappers) are sized by gauge and Bolts (machine screws bolts) are sized by their metric sizes - 3mm, 4mm, 5mm etc
Please see the table below for metric and imperial comparisons

InchesMetricScrew Gauge
i.e. self tapper
Bolt
i.e. machine screw bolt
  3.00mm   M3
0.136" 3.45mm No. 6  -
0.157" 4.00mm - M4
0.164" 4.17mm No.8  -
0.192" 4.88mm No.10  -
  5.00mm - M5
  6.00mm - M6

We try to list the fixing hole size where possible but it is not always available. As noted above its safe to assume that the fixing hole is at least 4mm for any modern fitting or more normally 5mm. A no.8 screw would fit into a 4mm fixing hole in a fitting.

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