OTTO Excavator Parts Sh4503B 6Uz1 Cylinder Head Cover Pad Nut 8943956846 894395-6846 8-94395684-6 For Isuzu OTTO Isuzu SH4503B 6UZ1 Cylinder Head Cover Pad Nut 8943956846 – 100% genuine OEM-grade fastener for Isuzu 6UZ1 engines. Bulk in-stock with fast global shipping, ideal for wholesale partners. Superior high strength, anti-loosening & precise pad fit, cuts rework/returns, boosts resale margins. Stable cross-border B2B supply.