M2
Mechanical / General Fasteners
confirmed prior to specification of
products.
With major sectors of US industry now
using metric fasteners extensively,
Conclusion Our projects are now
there is virtually no fastener that is
using metric socket head cap screws,
not obtainable in mm sizes.
set screws, hex bolts, and similar
items, whenever needed, in any
It is hard to imagine a well known
quantity. These have been stock for
manufacturer that does not stock,
years and available at about the
regularly make, or have the capability
same cost.
to produce metric products.
Mechanical / Anchor Bolts
Thomas Register has hundreds of firms
under Metric Fasteners, Metric Screws,
All new projects are specifying
and Metric Bolts.
metric anchor bolts
(ex, L, J, and U bolts). ASTM F568
IFI offers guides of fastener types and
gives metric chemical and mechanical
producers. Most firms in the division
data for carbon steel anchor bolts
4/5, covering some common construction
and studs, and references ANSI
fasteners, indicate metric ability.
dimensional standards. No metric
IFI Metric Fastener Standards (530 pg)
version of A307 is planned.
has technical data, selection hints.
IFI, (216) 241-1482
ISO Metric Grades as given in ISO
898 and ASTM F568, should be used.
Many pieces of mechanical and
Many anchor bolts are made from low
electrical equipment already use both
carbon steel grades, such as ISO
metric and english fasteners.
classes 4.6, 4.8, and 5.8.
Metric fasteners use M numbers. (M10 x
Many firms indicated no minimum
40 is nominal 10 mm diameter, 40 mm
order quantity, but some stated
length)
there would be premiums related to
set up costs for very small orders.
Some states already stock some metric
nuts and bolts. (ex, Colorado
Preferred Diameters From material
Department of Transportation)
we have seen, it appears preferred
nominal diameters for items such as
To conserve paper, we will not list the
anchor bolts and threaded rod, would
over 150 firms that stock or produce
be as shown below.
general metric fasteners. We will list
suppliers only for fasteners often used
Reference individual standards prior
in construction, which are not stock
to specification.
items yet.
Sizes are given between M5 and M45,
The following two charts provide
as these are commonly used sizes in
information on fasteners. Our source
construction.
cautioned that the material is several
years old and is soon to be revised, so
1: = 1st preference, 2: = 2nd
standards references should be
preference, etc.
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