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Quantity:
1
Availability:
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Features:
1.CNC aluminum alloy mountain bike color crank cover BB central axis screw sprocket specifications.
2.Aluminum alloy CNC machining, precision & strength, much better than the original plastic screws.
3.Various colors, suitable for personality modification.
Specifications:
Size: M18/M19/M20
Material: Aluminum Alloy
Weight:
M18:About 7g
M19:About 8g
M20:About 8.5g
Color:Colorful/Black/Red/Blue/Sliver/TItanium/Yellow/Green
M18 threaded screws are suitable for Haomeng hollow one-piece chain ring FS.A chain ring and the old FC-4500 and FC-5600 road chain ring, etc.
If you are not sure about the specifications, please measure by yourself
M19 threaded screws are suitable for IXF, LEBYCLE and other brands of hollow integrated crankse.
If you are not sure about the specifications, please measure by yourself
M20 crank cover screws are suitable for Shimano kits such as: M4000, M590, M596, M661, SLX, XT, XTR, etc.
If you are not sure about the specifications, please measure by yourself
Notes:
1.Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures.
2.Due to the manual measurement and different measurement methods, please allow 1-2cm deviation. Thanks!



























Customer Reviews
84 ratings
fast delivery (4)
super satisfying (4)
high quality (3)
fits perfectly (2)
as described (2)
easy installation (2)
Customer photos (15)
n***g
March 23, 2026
Variant: Color:M20 Green
ʕᵔᴥᵔʔ
A***n
December 3, 2025
Variant: Color:M19 Yellow
This seller is extremely understanding in capable of anything solving all your needs quick shipping a1 products love these things super satisfying 😊
A***n
December 3, 2025
Variant: Color:M19 Red
This piece fits my bike like a glove. This seller is very understanding and any situation or trouble you might have with their product awesome experience super dooper satisfied
A***t
October 29, 2026
Variant: Color:M18 Purple
This item is is of a very high standard and the quality and finish is beautiful. Looks so GOOD installed. Very happy with this purchase.
s***l
October 19, 2026
Variant: Color:M19 Yellow
TOP
Buyer from Paraguay
October 16, 2026
Variant: Color:M20 Blue
First impressions: good quality and finish.
Bicycle Crank Arm Fixing Bolt Crankset Nut Aluminum Alloy MTB Bike Crank Cover Screw Cap M18 M20 Bolt For Shimano Crank Bolt Cap
Quantity:
1
Availability:







