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.
Lock Nut
Lock Nuts (Prevailing Torque Nuts): Overview
Material:
- Common materials: Carbon steel (Grade 8/10), stainless steel (304/316), alloy steel (heat-treated), or brass.
- Surface treatments: Zinc plating, hot-dip galvanizing, Dacromet coating, or passivation (stainless steel) for corrosion resistance.
Manufacturing Process:
- Cold Heading: Forms the nut body (hexagonal or flanged) from steel wire.
- Thread Rolling: Precision internal threading (metric/SAE) using dies.
- Locking Feature Integration:
- Nylon insert: Press-fit a nylon ring into a machined groove (nylon insert lock nuts).
- All-metal deformation: Create non-circular threads or crimped top sections (all-metal lock nuts).
- Heat Treatment: Applied to carbon/alloy steel for enhanced hardness and tensile strength.
- Surface Finishing: Electroplating or coating for durability.
Key Production Considerations:
- Nylon insert quality: Ensure uniform density and moisture resistance for consistent friction.
- Thread deformation control: Precise tolerances for metal lock nuts to generate reliable torque resistance.
- Material compatibility: Match nut and bolt materials to prevent galvanic corrosion.
- Coating uniformity: Avoid interference with locking mechanisms (e.g., nylon insert adhesion).
Applications:
- Automotive: Wheel hubs, engine mounts, and transmission systems.
- Aerospace: Flight control assemblies and engine components.
- Industrial machinery: Rotating equipment, pumps, and conveyor systems under vibration.
- Electronics: Securing components in high-vibration environments (e.g., drones, robotics).
- Construction: Structural joints, scaffolding, and seismic retrofitting.
Installation:
- Tool selection: Use a torque wrench or socket matching the nut’s hex size.
- Thread preparation: Clean bolt threads and apply minimal lubrication (if required).
- Tightening:
- Nylon insert nuts: Hand-tighten until resistance is felt, then apply specified torque.
- All-metal lock nuts: Tighten to full torque in one motion to engage locking features.
- Torque control: Follow manufacturer guidelines to avoid damaging threads or inserts.
- Inspection: Verify no rotation post-installation; replace deformed or worn nuts.
Note:
- Reusability: Nylon insert nuts are limited to 3-5 reuses; all-metal nuts depend on thread integrity.
- Temperature limits: Avoid nylon inserts above 120°C; use all-metal variants for high-temperature applications.
- Load capacity: Select nut grade (e.g., Grade 10) based on bolt strength and dynamic load requirements.
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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