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Ted's daft question of the week ?

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McCabe-Thiele (Ted):
I really am not getting to grips with Honda metric bolts & threads.

The sump has some 11 bolts listed in the parts manual as Bolt, Flange, 6 x 40 part number 95700-06040.

My sump bolts do not have a flange (if that's a built in washer) on them or a loose washer so they may have been repaced or it's a superseded part number.

I assume 6 x 40 is the thread size and length. Is that automatically m6 fine thread?

Is the length 40mm from the flange base to the end of the thread or is it the overall length including the bolt head.

It looks to be as cheap to fit new SS bolts as having the old ones Zinc Plated your comments & observations welcome please ??

Bryanj:
M6 will be m6x1 and the length is measured from under the head(or flange) to the end of thread. NOTE:- when purchasing,
BOLTS  have a none threaded portion under the head
SETSCREWS are fully threaded

McCabe-Thiele (Ted):

--- Quote from: Bryanj on June 30, 2021, 05:54:31 PM ---M6 will be m6x1 and the length is measured from under the head(or flange) to the end of thread. NOTE:- when purchasing,
BOLTS  have a none threaded portion under the head
SETSCREWS are fully threaded

--- End quote ---

Thanks Bryan that means presumably as its's a smallish diameter it's automatically a coarse metric thread?

Bryanj:
Not really Ted under the iso system each diameter has a prefered or standard pitch and then one or two alternatives.
A lot of the smaller metric are 1mm till you get right down then its 0.75

McCabe-Thiele (Ted):

--- Quote from: Bryanj on June 30, 2021, 09:52:26 PM ---Not really Ted under the iso system each diameter has a prefered or standard pitch and then one or two alternatives.
A lot of the smaller metric are 1mm till you get right down then its 0.75

--- End quote ---

I have the idea in my head that a fine thread would be in steel with coarse in alluminium so clearly not the case then?

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