Shimano Ultegra FC-6600 Crank Arm Fixing Bolt - Y1G311000

£6.99 Please note this product has selling restrictions to your country. was
Manufacturer : 
SJS Cycles part number : 
Manufacturer part number : 
For use with Shimano Ultegra FC-6600 10 speed double chainsets.

This crank arm fixing bolt can also be used on the following chainsets:

- Shimano Ultegra FC-6650-S
- Shimano Ultegra FC-6603-A
- Shimano Ultegra FC-6603
- Shimano Ultegra FC-6600-A
- Shimano 105 FC-5650
- Shimano 105 FC-5603
- Shimano 105 FC-5600
- Shimano FC-R700

These are an "A" match which indicates that the parts are the same in materials, appearance, finish & size etc.

If the correct crank arm fixing bolt is unavailable you can also use the bolt from the following chainset:

- Shimano FC-R600

This is a "B" match which indicates that the parts are usable, but differ in materials, appearance, finish & size etc.

Genuine Shimano replacement part.
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Questions & Answers (6)
Will the FC6600 fit Shimano M580 crank?
29 Jun 2020
I have a Shimano Deore LX crankset with FM580/581 crank. Been trying to find Shimano plastic bolt to fit 15 mm diameter hole, but to no avail. Will the FC 6600 bolt (Y1G311000) fit here in this case? The FM580 crank bolt cat no is Y-1FU12000.
We do no list the bolts by size, as they are designed for specific chainsets; this thread is 15mm.

Thanks - 30/06/20
I have both 6600/6650 cranksets, they take different bolts.
11 Mar 2019
I have the original (alloy) 6600 that takes the smaller diameter thread bolt featured on this page, but when I tried to move it to a newer (grey) 6650 crankset, it didn't fit. In the end I got the crankset working by cannibalising a Dura Ace 7800 crankset. Which one should I buy for the 6650? Thanks...
Hi there,

The one you need would be this one. I have checked on Shimano's website and found that they should all take the same bolt.

what is the thread diameter on this? Is this M15?
13 May 2018
I notice there are three main sizes , the 15mm, 18mm and a 20mm bolt. I want this is aluminium.
This is the 15mm option.

Hi. Is this longer than the original
18 Apr 2018
Hi. Ive added 2mm spacers to either side bb and my original bolt wont screw in. I need one just a little longer. Would this be ok thanks. Ill get it if so loz
Hi there,

If the original end bolt is not suitable then the crank arm is not sitting far enough onto the axle and therefore a longer bolt will not resolve this issue. Please contact our sales team to discuss further.

Does It Fit For Ultegra Fc6600 ? What Is The Diameter Of The Bolt ?
09 Feb 2016
I bought one M20 size from another source but turned out to be larger than it is supposed to be.

This is indeed the correct crank bolt for use with your FC-6600 Ultegra chainset. The diameter of the bolt is 15mm.

Can You Tell Me If This Will Work With Ultegra Sl 6601?
09 Jun 2015
Can you link me to 1 that will work with ultegra sl 6601 please?

This bolt has the wrong sized thread to fit the FC-6601 chainset, the correct bolt you need is SJSC part 14614.