Rotary 2333 Steel Insert #28103 M10 X 1 by Rotary $6.20 Sold out 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Sold out PRODUCT INFORMATION Type Other PRODUCT DESCRIPTION DESCRIPTION Steel Insert 28103. New Recoil/Alcoa # 28109. Fits 10MM X 1.0 Sparkplug Threads. SPECS THREAD SIZE M10 X 1