Features: 1.Part Number: According to the original factory specifications, replacing rOEM numbers are 90121?HN1?000, 90305?GE8?003, 52101?HP1?000. 2.Applicable Model: Swing arm pivot bolt nut fit for TRX450R 2004?2009, fit for TRX450ER 2006?2014 , and fit for TRX400EX 1999?2008. 3.Firm Fixing: This is the big bolt that goes through the frame and holds the swingarm onto the frame, includes bolt, nut and washer. 4.High Quality Material: Swing arm bolt nut is made of heavy duty metal and ABS material, high hardness, wear resistant and durable. 5.Perfect Fit: Premium quality replacement parts, stable characteristics, high reliability, direct replacement, no modifications necessary. Specification: Item Type: Swing Arm Bolt Material: ABS + metal Replacement OEM Numbers: 90121-HN1-000 and 90305-GE8-003, 52101-HP1-000 Fitment: For TRX450R 2004-2009 For TRX450ER 2006-2014 For TRX400EX 1999-2008 Note: 1. Please double check the part number of your item, matching information is for reference only. 2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!