Disc Spring Washers Explained: How Belleville Washers Work, Their Benefits and Common Uses
Disc spring washers (Belleville washers) store elastic preload to keep bolted joints tight under vibration, heat, and lo...
DIN 471 vs. DIN 472: Which Circlip Do You Need?
Not sure if your assembly needs a DIN 471 external circlip or a DIN 472 internal circlip? Learn the shaft-vs-bore differ...
What Is a Retaining Ring? Types, Uses & Selection Guide
A plain-English guide to retaining rings—what they are, the main types (DIN 471/472/6799), where they are used, and how ...
Microscopic Metallographic Inspection Ensures Stable Mechanical Properties of Products
Our professional quality inspection team conducts in-depth metallographic structure analysis on raw materials using a me...
FAQ
What documents can you supply for bulk purchasing inspection?
Material certificate, dimension inspection report and surface treatment test sheet can be issued as buyer’s requirement.
How about production lead time for stocked items and customized non-standard goods respectively?
In-stock standard goods ship within 7 working days; customized non-standard products take 30–45 working days after deposit confirmation.
Is mixed loading of different kinds of fasteners allowed in one shipment to save customer’s logistics cost?
Multiple product categories and mixed sizes can be packed together in one container for large orders to reduce overall freight expense.
Can you make different surface treatments such as black oxide, phosphating and oil coating according to customer requirements?
Multiple surface options are available for all products; surface processing plan can be adjusted based on client’s actual working environment.