Yeah i know its a bit of a shot in the dark but you never know....
Im looking for some bolts for the crown gear for a gearbox build.
They are left hand thread M10x20mm Hex Washer Head Bolts look like they are fine pitch metric- need about 10pcs
Honda will want a fortune for them so looking to see if anyone knows a different source of supply or even better if anyone has some lying around;) The Honda ones have a small arrow on the head to show left hand thread direction - might help identify
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M10x20mm hex washer head bolts - left hand thread
- vanzep
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M10x20mm hex washer head bolts - left hand thread
Last edited by vanzep on Tue Apr 19, 2016 9:31 pm, edited 1 time in total.
1996-2000 1993 EG9 Blue Civic 1.6 Vti - Traded in against the BB4
2000-2019 1994 2WS BB4 Milano Red JDM Prelude Si VTEC LSD
2015 on > 1991 4WS BB1 Phantom Pearl Grey JDM Prelude Si VTEC LSD
2021 ON > 1998 2WS BB6 White Pearl JDM Prelude Si VTEC
2000-2019 1994 2WS BB4 Milano Red JDM Prelude Si VTEC LSD
2015 on > 1991 4WS BB1 Phantom Pearl Grey JDM Prelude Si VTEC LSD
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- hondaddict
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Re: M10x20mm hex washer head bolts - left hand thread
I've got some of these, maybe 20 or more, but i'm really far from you
If you didn't find them, i could send them to you , just tell me

If you didn't find them, i could send them to you , just tell me

Accord Type R , "what else" 

- vanzep
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hey thanks for that
believe it or not ive found some off another gearbox locally
funny how some of the bolts had flattened threads (not cross threaded) when removed from the crown - yet others were perfect
believe it or not ive found some off another gearbox locally

funny how some of the bolts had flattened threads (not cross threaded) when removed from the crown - yet others were perfect
1996-2000 1993 EG9 Blue Civic 1.6 Vti - Traded in against the BB4
2000-2019 1994 2WS BB4 Milano Red JDM Prelude Si VTEC LSD
2015 on > 1991 4WS BB1 Phantom Pearl Grey JDM Prelude Si VTEC LSD
2021 ON > 1998 2WS BB6 White Pearl JDM Prelude Si VTEC
2000-2019 1994 2WS BB4 Milano Red JDM Prelude Si VTEC LSD
2015 on > 1991 4WS BB1 Phantom Pearl Grey JDM Prelude Si VTEC LSD
2021 ON > 1998 2WS BB6 White Pearl JDM Prelude Si VTEC
- hondaddict
- Posts: 275
- Joined: Sun Mar 06, 2016 2:51 pm
- My Generation: 3G
- Been thanked: 1 time
- vanzep
- Supporter 2016
- Posts: 7143
- Joined: Sun Jan 29, 2012 6:38 pm
- My Generation: 4G
- Location: Edinburgh
- Has thanked: 306 times
- Been thanked: 505 times
thanks for the info
it did seem a bit odd that some threads were flatted and some were ok
the threads in the crown that the bolts came out of looked undamaged. I dont think its due to over torque but i guess a small amount of dirt/oil in the threads along with the twisting action on the gear could over time possibly cause this wear. but its not so much of a worry now that i know its a problem others have seen when building/stripping down their gearboxes 

it did seem a bit odd that some threads were flatted and some were ok


1996-2000 1993 EG9 Blue Civic 1.6 Vti - Traded in against the BB4
2000-2019 1994 2WS BB4 Milano Red JDM Prelude Si VTEC LSD
2015 on > 1991 4WS BB1 Phantom Pearl Grey JDM Prelude Si VTEC LSD
2021 ON > 1998 2WS BB6 White Pearl JDM Prelude Si VTEC
2000-2019 1994 2WS BB4 Milano Red JDM Prelude Si VTEC LSD
2015 on > 1991 4WS BB1 Phantom Pearl Grey JDM Prelude Si VTEC LSD
2021 ON > 1998 2WS BB6 White Pearl JDM Prelude Si VTEC