Custom CNC Machined High Corrosion Resistance Oil Plug with Dacromet Surface Treatment and ±0.01mm Tolerance for Auto Engine Oil Drain

Situo Hardware is a professional CNC manufacturer specializing in custom automotive sealing hardware. We focus on producing custom CNC machined new energy vehicle oil plugs and non-standard auto engine oil drain plug hardware parts for new energy vehicles, hybrid cars, traditional fuel vehicles and special automotive equipment.

Our auto oil drain plugs are integrally CNC machined with high-precision thread and smooth sealing surface. Adopting premium aluminum alloy, stainless steel and carbon steel materials, our custom oil plugs feature high pressure resistance, high temperature resistance, anti-leakage and anti-vibration performance.

Solving common defects of ordinary plugs such as oil leakage, thread slipping and loose locking, our precision sealing plugs are widely used in vehicle battery packs, motor housings, gearboxes and chassis oil circuit systems.

We provide optional 6061 aluminum alloy, 304 stainless steel and high-strength carbon steel to meet different vehicle working requirements. Aluminum oil plugs are lightweight, rust-proof and heat-dissipating, suitable for new energy battery packs and lightweight chassis; stainless steel and carbon steel plugs feature high compression resistance and high pressure resistance, perfect for engine and gearbox high-load oil circuits.

All raw materials are strictly inspected with uniform texture and no defects, ensuring stable performance under long-term vibration and temperature alternation of automobiles.

All automotive oil plugs are completed in one clamping CNC machining process, integrating sealing surface, thread, positioning step and chamfer forming. The precise thread profile is full and smooth without burrs, slipping or broken teeth. The flat sealing surface ensures tight fitting and stable locking.

The stable machining tolerance reaches ±0.005mm. Strictly controlled dimensional accuracy ensures excellent sealing performance, effectively preventing oil leakage and loosening under high-pressure and high-temperature operating conditions.

We support full non-standard customization of all automotive oil plugs, including new energy battery pack waterproof plugs, gearbox oil drain plugs, engine oil sealing plugs, anti-slip locking plugs and special-shaped long/short plugs.

Custom thread pitch, tooth type, size and structural shape are available according to customer drawings, samples and installation space requirements. We solve the poor adaptability and sealing deficiency of standard plugs, covering new energy, hybrid and modified vehicle supporting needs.

One-piece solid cutting structure provides high structural density and strong fatigue resistance. Optimized for automobile long-term vibration, high oil pressure and extreme temperature working conditions, our custom oil plugs maintain stable sealing performance without deformation, thread loosening or oil leakage.

Compared with ordinary stamped and forged plugs, CNC precision machined plugs have better stability and longer service life, improving vehicle driving safety and oil circuit system reliability.

Multiple surface treatments such as anodizing, galvanizing, nickel plating and anti-rust passivation are available to enhance wear resistance, corrosion resistance and oxidation resistance.

All finished oil plugs undergo thread gauge testing, sealing surface calibration, high-pressure sealing simulation and full-dimensional inspection before delivery. The batch qualified rate exceeds 99%. High consistency and interchangeability fully meet international auto parts export standards.

• Waterproof and oil-proof sealing plugs for new energy vehicle battery packs and motor housings
• Gearbox and oil circuit drain plug hardware for electric and hybrid vehicles
• Engine oil sealing plugs and chassis oil tank blocking parts for fuel vehicles
• Non-standard precision oil circuit sealing fittings for auto modification and special vehicles
• Locking oil plugs for vehicle hydraulic and pneumatic system sealing

Situo Hardware has complete independent production capacity for custom automotive oil plug parts. We specialize in high-precision CNC machining of new energy vehicle sealing accessories. We support 24-48 hours rapid prototyping, flexible batch orders and global export delivery.

Material certificates, performance test reports and standard auto-parts packaging can be provided. We provide one-stop structural optimization, customization and batch delivery solutions for global automotive parts buyers and new energy vehicle manufacturers.

We have introduced advanced equipment and technology from Japan and Germany (CNC 5-axis and 6-axis machines) to better serve our customers' needs.

Our maximum processing outer diameter is 60, and the minimum control tolerance is 0.001. We have Japanese CNC Tsugami, CNC Citizen, multi-station cold extrusion forming machines, 500T press machines, casting equipment, and various process equipment, which can effectively provide customers with the best technical solutions.

Our company has a total of 300 employees, including 20 technicians, 10 engineers, and 15 quality control personnel. We have over 300 pieces of equipment.

Our company implements 8S management and has passed ISO9001 and TS16949 automotive certifications.

Our customers include Foxconn, Motors, Husqvarna, Shimano, NVIDIA, DJI Drones, Siegenia.