SATO RACING Store › Collar 3-8 (BK) Image 1 of 1 Collar 3-8 (BK) $6.00 Collar 3-8 (BK) part# CLR3-8 - Black anodized aluminum spacer collar with a 3mm thickness, for use with M8-size bolts. Get notified by email when this item is in stock again. Quantity: Add To Cart Added! Collar 3-8 (BK) part# CLR3-8 - Black anodized aluminum spacer collar with a 3mm thickness, for use with M8-size bolts.