It is used for purposes that involve repeatedly tightening and loosening the fixation of doors.
At Sun-Ei Co., Ltd., we offer custom-made screws tailored to specific products and specifications for applications such as construction, machine tools, transportation machinery, industrial machinery, and chemical plants. If you have any special screws that are not available on the market, please feel free to consult us about anything. "Special anti-drop screws" are used in applications where doors need to be secured and frequently tightened or loosened. They do not fall off when loosened, making them convenient as they cannot be lost. We can accommodate both modifications from commercially available bolts and custom manufacturing. For more details, please contact us or refer to our catalog.
Inquire About This Product
basic information
【Features】 ○ Used for applications that require repeated tightening and loosening, such as securing doors. ○ It won't fall even when loosened, making it convenient and preventing loss. ○ We can accommodate both modifications from commercially available bolts and custom manufacturing. 【Strengths of San-Ei Co., Ltd.】 ○ We handle all processing from machining to surface treatment. ○ Same-day quotation available. ○ We can accommodate small lot production. ● For more details, please contact us or refer to our catalog.
Price information
Please contact us.
Delivery Time
※Please contact us.
Applications/Examples of results
For more details, please contact us or refer to the catalog.
catalog（1）
Download All Catalogs
Company information
I want to outsource manufacturing... Is it possible to procure cheaply from overseas? Managing product rotation and oversight is tough! San-Ei will help solve the problems together. We provide solutions to address challenges with a one-stop service. We respond to a wide variety of situations and can ensure speedy delivery through numerous partner manufacturers. By collaborating with our office in Vietnam, we assist in reducing costs while maintaining Japanese quality. We provide consistent support from planning to product, aiming to shorten the time for each process. Recently, we have received high praise even for prototypes and small lots.