[First Industrial Co., Ltd.] is currently publishing "Useful Information about Screws" on its website. A leading fastener manufacturer explains the basics of screws and more.

[Attention Engineers] The Basics of Screw Manufacturing Technology: "Forging Process." We are currently offering free technical materials on "Basic Knowledge of Forging Process," which explains the differences in the manufacturing of bolts and nuts.

Many "screw products" such as bolts and nuts are manufactured using "forging." "Forging" is a processing method that uses molds to shape metal materials by compressing them. It has many advantages, such as good yield, suitability for mass production, and increased strength due to work hardening. Although both are "screw products," bolts and nuts differ in materials, manufacturing processes, and manufacturing equipment. At Daiichi Kogyo, as a specialized group that manufactures both bolts and nuts, we have accumulated production and manufacturing technologies that correspond to each of these differences. We also utilize FEM analysis to conduct forging simulations, which are applied in process design and mold design. The reason we can manufacture both bolts and nuts can be found in the link below: "Production and Manufacturing Technology of the Specialized Group." A specialized group that manufactures both bolts and nuts has compiled "Basic Knowledge of Forging." We provide a clear explanation of the actual processing steps with accompanying photographs. Improvement examples utilizing FEM analysis are also included. Please download and take a look.

• others

[Attention Engineers] Screw manufacturing is not just about forging. There is also cutting and welding. We offer a free [technical document] that provides fundamental knowledge of each technique!

Daiichi Kogyo is a specialized group that develops and manufactures fastening components, including bolts and nuts. 【What a specialized group can do】 While "forging" is the common method for screw manufacturing, "cutting" is also an important processing technique for screw production when complex shapes or additional processes like drilling are required. Daiichi Kogyo possesses the manufacturing know-how necessary for "forging," "cutting," and "welding" in screw production. We can perform "composite processing" that combines these techniques. Forging + Cutting + Welding ⇒ Composite products With the accumulation of each processing technique, we can set up processes that leverage the characteristics of each method. 【Manufacturing Example】Production of parts with strict precision requirements. ● When manufactured using only "forging," the load on the mold increases, raising concerns about mold lifespan and quality deterioration. ↓ ● By switching from "forging" to "cutting" for manufacturing, we can reduce the load on the mold and lower forging costs, achieving quality improvement as well. For more details, please visit the following 【Daiichi Kogyo Co., Ltd. Fastener Division Fastening Components Site】. We are currently offering free technical materials that provide basic knowledge of screw manufacturing techniques, including "cutting and welding." Please download and take a look.

• others

What is delayed fracture? Why does hydrogen embrittlement occur? What are the prevention measures? I will explain the basics of delayed fracture and hydrogen embrittlement in an easy-to-understand manner.

Are you familiar with "delayed fracture of screws"? "Delayed fracture" refers to the phenomenon where a static stress (tensile or bending load) is applied at room temperature for a certain period of time, and then it suddenly fractures without any apparent plastic deformation. Despite the absence of large or repeated loads, the bolt suddenly fails... It might be due to delayed fracture. In fact, the mechanism behind "delayed fracture" has not been fully elucidated. The phenomenon of hydrogen embrittlement is considered to be an important factor. - What is delayed fracture? What are its testing methods? - What is hydrogen embrittlement? What are the countermeasures? This is a technical document that provides a basic understanding of these topics. Please refer to the PDF for more details. As a specialist in manufacturing both bolts and nuts, our company conducts performance testing and evaluation from the development stage at our R&D center to ensure that we meet our customers' performance requirements. We are also available for technical consultations. Please feel free to reach out to us.

• others

The trend towards lightweight materials is leading to the use of resins. We will clearly explain the basics of "insert nuts" needed for fastening resins, accompanied by illustrations!

An insert nut is a "fastening component" that is embedded in soft materials such as resin (plastic) to enhance the fastening strength of joints. With the aim of reducing weight, the use of resin is increasing. Insert nuts are used for fastening resin parts in various devices such as mobile phones, automobiles, and airplanes. This document provides a clear explanation of the "basic knowledge of insert nuts," including their features, types, usage, and materials, accompanied by illustrations. It also includes information on the types and characteristics of resins used with insert nuts. *For more details, please download the document or contact us directly.*

• others

You will understand the basics of "surface treatment" that improves the corrosion resistance and appearance of screws. This will explain the characteristics of representative surface treatments.

Metal screws, such as those made of iron, will corrode and rust due to electrochemical reactions after being molded for a while. Corrosion and rust can lead to poor appearance and reduced strength of the screws. To prevent such issues, surface treatment is applied to improve the rust and corrosion resistance of the screws. There are many types of surface treatment methods, each differing in functions such as corrosion resistance and appearance (color). It is necessary to choose the optimal surface treatment according to the purpose and usage environment. This document clearly explains the characteristics of commonly used surface treatments for screws: "Electrogalvanizing," "High Nickel Type - Zinc-Nickel Alloy Plating," and "GeometⓇ Treatment." It is a compact version that can be easily viewed. [Contents] ● Main types and overviews of surface treatments ● Surface treatments commonly used for screws For those who want to know more about surface treatments for resin fastening components, you can view more details here. [Technical Document] Understanding the Differences in Treatment Methods: 'Surface Treatment of Resin Fastening Screws' https://screw.daiichikogyo.co.jp/product/surface_treatment Please take a look.

• others

[To the owners of parking lots and parking lot construction companies] "I am worried about the possibility of colliding with pedestrians when exiting the parking lot..." Among vehicle entrances to parking lots, stores, residences, and factories, those particularly facing sidewalks or roadways are expected to pose risks of dangerous incidents such as pedestrian collisions and vehicle-to-vehicle accidents. To alleviate such concerns, Hotron proposes a [Vehicle Exit Warning Sensor] that detects vehicle departures at various sites and alerts the surrounding area with LED lights and buzzers. The system consists of a simple configuration of "Sensor" + "Controller" + "Switching Power Supply (24V)" + "LED Rotating Light." *When using the exit warning system, we kindly ask that you arrange for the switching power supply (24V), LED rotating light, control panel, circuit breaker, etc. Since it can be retrofitted, it can also be used for existing parking lot entrances. [Contents Included] ○ Exit Warning System Configuration ○ Comparison Table of Exit Warning Sensors ○ Four Modes ○ Wide Range of Applications ○ Customer Feedback ○ Appearance Diagram / Specifications ◎ For more details, please contact us or download the catalog.

In recent times, there has been a growing interest in infection control measures and facility hygiene management. Our company offers non-contact sensor products that are recommended for commercial facilities, food factories, and nursing and caregiving facilities. 【Sensors for Automatic Doors】 ● Light Touch Sensor HA-T401 … When you wave your hand in front of the automatic door, the sensor detects the movement and opens or closes the door. This is recommended for making doors with touch switches non-contact. ● Hand Wave Sensor PF-R5, PF-U2, DHS-1 … Opens and closes the automatic door by waving your hand in front of the sensor. ● Foot Switch PF-01S/01D/03S/05 … Opens and closes the automatic door by placing your foot in the opening. 【Access Control System】 ● Face Recognition + Unmanned Temperature Measurement DS Series … Allows for face recognition along with mask detection and body temperature measurement simultaneously. ● Automatic Disinfectant Spray Dispenser PHW-03B … Automatically sprays disinfectant when you wave your hand in front of the sensor. 【Nursing and Care Sensors】 ● Infrared Bed Exit Sensor "Just Place It Pole-kun" … This bed exit sensor is installed next to the bed and notifies via nurse call when the subject enters the detection range. ◎ For more details, please download the catalog or contact us.

As the new year begins, I would like to extend my heartfelt congratulations on your continued prosperity. I sincerely appreciate your exceptional support throughout the year. This is the STJ Group (Santec Telecom Japan, STJ Rentec). Now, I am pleased to announce that we will be opening our "Transceiver & Smartphone Rental Shop" simultaneously at three locations nationwide on January 26 (Monday)! ■ List of Services to be Offered - Same-day pickup/return of rental equipment - Usage explanations and demonstrations of rental equipment - Wireless solution consultation desk - Mobile BPO service counter As a special promotion to celebrate the opening of the rental shop, we are currently running a special price campaign for rental equipment pickup at the shop! For more details, please contact us!

This is the Agricultural Division of Sumitomo Forestry Greenery Co., Ltd. In our division, we manufacture and sell potting soil for agricultural, horticultural, and greening purposes. In the future, we would like to regularly introduce our products through the Nōsan Girl Letter.

We would like to inform you about our participation in the IT Trend EXPO 2026 Spring. 《Exhibition Information》 With the concept of "New encounters will change the way we work tomorrow," one of the largest online exhibitions in the industry will be held. NTT TechnoCross will be exhibiting in the Human Resources Comprehensive category. We have prepared numerous discussions and sessions featuring special guests who are active on television, allowing even those who are usually busy to efficiently gather information on products and services related to IT and DX. Additionally, the first 10,000 participants will receive a 500 yen Amazon gift card. Please be sure to register early. 《Exhibition Overview》 March 3 (Tuesday) to March 7 (Saturday), 2026, online (free: pre-registration required) 《Participation Registration》 https://it.expo.it-trend.jp/key/opl7kgdj *Please register (free) by clicking "Receive Ticket / Proceed to Participation Registration" at the above URL.