John,
The 8.8 markings on the metric bolts:
The first 8 means that the bolt has a yield strength of 8 times 10 kgf per
sq. mm; the second 8, after the dot, means that the ratio of minimum yield
stress (0.2% elongation) and minimum tensile strength is 8 times 10 or 80%.
I'd say you're ok with the 8.8's but be careful with those nuts: I would
expect them to be loose, and disguised by the nyloc insert.
Dave
-----Original Message-----
From: JohnJMoran@aol.com <JohnJMoran@aol.com>
Date: 10 December 1999 16:23
Subject: Trailer ??
>Assembly of my trailer, the zinc plated model by E.J. Nelson, is nearly
>complete. Several of the metric bolts supplied were too short for their
>intended use. In order to complete assembly I substituted 3/8 inch bolts
from
>the local hardware store. Surprisingly, these are almost exactly the same
>size and allow use of the nylocs supplied with the M10 bolts.
>
>I am unfamiliar with the markings on the metric bolts supplied so don't
know
>whether they are normal strength or high strength. The markings contain
>letters (T, or TVS, or MS) plus all bolts have the number 8.8 below the
>letters. Could someone enlighten me on this so I can decide whether the
>substitute bolts are appropriate or must be replaced with high strength
>bolts? Would stainless bolts be acceptable?
>
>The tongue weight of the unloaded trailer is a surprisingly high 87 pounds.
>Is this normal or is it due to the change to mostly steel construction
>without adjusting the design for the different material weight. (Only the
>center rail is aluminum). Will the tongue weight increase further when the
>Europa is loaded?
>
>What is the normal inflation pressure for the trailer tires?
>
>John A044 Newtown, CT
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