Is the Bolt for BANJO metric, AISI 316 steel compatible with marine environments and resistant to corrosion without a washer?

Yes. Bolt for BANJO metric, AISI 316 steel is compatible with marine environments and offers strong corrosion resistance even without a washer, because AISI 316 (and 316L) contain molybdenum which significantly improves resistance to chloride-induced pitting and crevice corrosion common in seawater. However, a few caveats: - Corrosion resistance depends on exposure severity: in normal marine splash, atmospheric and mildly brackish conditions 316 performs well; in constant immersion in warm, highly saline, or highly polluted seawater, pitting and crevice corrosion risk increases over time compared with higher-alloy materials (e.g., duplex stainless or titanium). - Fastener geometry and mating materials matter: the banjo bolt without a washer increases reliance on proper sealing and contact design. Metal-on-metal contact or trapped crevices can promote local corrosion; galvanic couples with dissimilar metals may accelerate corrosion. - Mechanical sealing and preload: washers often distribute load and help seal fluid connections. Without a washer, ensure correct torque, flat mating surfaces, and appropriate sealing method (e.g., integrated O-ring, bonded seal, or thread sealant) to prevent leaks and crevice formation that could undermine corrosion resistance. - Maintenance and inspection: regular inspection, cleaning of deposits, and avoiding prolonged exposure to stagnant seawater will extend service life. Conclusion: Bolt for BANJO metric, AISI 316 steel is generally suitable for marine use and resists corrosion well without a washer in many applications, but for harsh marine conditions, critical joints, or where sealing and galvanic compatibility are concerns, consider using a washer, higher-alloy material, or additional protective measures.

Can Bolt for BANJO metric, AISI 316 steel be used in saltwater exposure without a washer and still prevent galvanic corrosion?

No. Bolt for BANJO metric, AISI 316 steel used in direct saltwater exposure without a washer will not reliably prevent galvanic corrosion. AISI 316 has good general corrosion resistance but is still susceptible to pitting and crevice corrosion in chloride-rich environments. Without an insulating or sacrificial washer, metal-to-metal contact between the bolt and dissimilar fittings (e.g., brass, bronze, aluminum) creates a galvanic cell that accelerates corrosion of the less noble material and can cause crevice corrosion at the joint. For marine applications use AISI 316/316L bolts with compatible materials, a non-conductive or sacrificial stainless washer or barrier coating, and proper sealing to minimize crevice and galvanic attack.

Does Bolt for BANJO metric, AISI 316 steel require a washer to maintain sealing and prevent leaks?

No. Bolt for BANJO metric, AISI 316 steel does not require a separate washer to maintain sealing and prevent leaks when used as a Banjo type Z screw without washer, metric. These bolts are designed to seal against the mating flange or banjo fitting by their precisely machined face and correct torque. However, reliable leak-free performance depends on correct installation: - Ensure mating surfaces (banjo fitting and flange) are clean, flat and free of damage or debris. - Use the correct bolt size, thread engagement and torque specified for the assembly and material; under- or over-torquing can cause leakage. - For high-pressure, aggressive fluids, repeated disassembly, or imperfect mating surfaces, consider using a crush washer or O-ring even if the bolt is of the Z type to increase reliability. - Verify compatibility of AISI 316 with the fluid and operating temperature to avoid corrosion or deformation that could compromise sealing. In summary: Bolt for BANJO metric, AISI 316 steel (Banjo type Z screw without washer, metric) is intended to seal without a washer, but proper surface condition, correct torque and application-specific risk assessment determine whether adding a washer or seal is advisable.

Bolt for BANJO metric, AISI 316

All products, Fittings for high-pressure hoses/

Additional information

Standard length [m]	3

Bolt without washers for fitting BANJO type – Z, metric. Material: AISI 316 or AISI 316L.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
TI-ZMB610-10X1-SS-PH	Bolt for BANJO M10x1, AISI 316	-	-	In stock	Enquiry
TI-ZMB610-12X1,5-SS	Bolt for BANJO M12x1.5, AISI 316L	-	-	In stock	Enquiry
TI-ZMB610-14X1,5-SS	Bolt for BANJO M14x1.5, AISI 316L	-	-	In stock	Enquiry
TI-ZMB610-16X1,5-SS	Bolt for BANJO M16x1.5, AISI 316L	-	-	In stock	Enquiry
TI-ZMB610-18X1,5-SS	Bolt for BANJO M18x1.5, AISI 316L	-	-	In stock	Enquiry
TI-ZMB610-22X1,5-SS	Bolt for BANJO M22x1.5, AISI 316L	-	-	In stock	Enquiry
TI-ZMB610-26X1,5-SS	Bolt for BANJO M26x1.5, AISI 316L	-	-	In stock	Enquiry
TI-ZMB610-30X1,5-SS	Bolt for BANJO M30x1.5, AISI 316L	-	-	In stock	Enquiry