A: It depends.If we have bulk goods in stock, we can ship goods within 3 days after the QC process. If we don’t have stock, normally it takes 7-15 days for OEM samples and 20-30 days for bulk goods. If it refers to opening the new mold, it takes an extra 7-15 days to make the mold.
Oil Passage Bolt
Oil-Finished Bolts (Oil-Treated Bolts): Overview
Material:
- Common materials:
- Carbon steel (Grade 4.8/8.8) for general-purpose use.
- Stainless steel (304/316) for enhanced corrosion resistance.
- Surface treatments:
- Oil impregnation: Anti-rust oil coating applied to prevent oxidation and reduce friction.
- Black oxide coating: Combined with oil treatment for added corrosion protection.
Manufacturing Process:
- Cold Heading: Forms the bolt head and shank from steel wire.
- Thread Rolling: Precision threading (metric/SAE) using dies.
- Heat Treatment: Applied to carbon steel bolts (optional for Grade 8.8+) to enhance hardness.
- Surface Treatment:
- Oil immersion: Dipping bolts in anti-corrosion oil to penetrate threads and crevices.
- Black oxide coating: Chemical conversion coating followed by oil sealing.
- Cleaning & Packaging: Remove excess oil and package in rust-inhibitive paper or plastic.
Key Production Considerations:
- Oil coverage: Ensure uniform oil film on threads and shank to prevent rust.
- Coating adhesion: Black oxide must bond tightly to the steel surface before oil treatment.
- Material compatibility: Match oil type to application (e.g., food-grade oil for machinery in food processing).
- Thread protection: Avoid oil buildup that could attract debris or interfere with torque values.
Applications:
- Automotive: Engine components, chassis parts, and exhaust systems exposed to moisture.
- Agricultural machinery: Fasteners for tractors, harvesters, and irrigation systems.
- Marine equipment: Bolts for docks, boat fittings, and coastal infrastructure.
- Outdoor furniture: Assembly of garden tools, railings, and sheds.
- General maintenance: Replacement bolts for machinery requiring rust prevention.
Installation:
- Tool selection: Use manual wrenches or torque tools compatible with the bolt head (hex, socket).
- Cleaning: Wipe excess oil from threads if necessary (avoid removing protective coating).
- Thread engagement: Hand-tighten to align threads before applying torque.
- Torque application: Follow manufacturer specifications to avoid stripping threads.
- Post-installation: Periodically inspect and reapply oil in high-corrosion environments.
Note:
- Reusability: Oil-treated bolts can often be reused if threads remain intact and oil coating is maintained.
- Temperature limits: Avoid high-temperature environments where oil may degrade (use stainless steel alternatives).
- Compliance: Suitable for applications requiring minimal lubrication and temporary corrosion resistance.
Frequently Asked Questions
A: Normally, we make a 30% deposit after Pl confirmation and a 70% balance before shipment. lf order amountis too small, we can also change to 100% deposit in order to save bank handling charge.
A: A pre-bulk sample check can solve this problem to the largest extent. We will arrange production according to the pre-bulk sample quality standard after your confirmation of the samples.
A: We are not only a trading company but also a manufacturer. Our factory mainly focuses on mold design and quality inspection. Our bulk production may come from the factories we have worked with for a long time, and they are all ISO9001 certified. Through this cooperation model, we can not only ensure product quality and service, but also satisfy the diversified product needs of customers, and the price is more advantageous.
A: Yes,we are very glad to offer you samples.
However the express courier cost from our company to your required address will be upon your account.
Usually we use DHL, UPS, FEDEX or EMS as the courier.
It will take 3-7 days to arrive many Europe countries and North America.
Which express courier we will use, it’s up to your convenient or the express charge.
A: No,just part of our capable categories have been showed in our site.
If you are looking for relative industrial products, please feel free to contact us.
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