- ZHUHAI JIALI HARDWARE CO.,LTD.
- +86-756-8586520
L type hex key
- Product description：1. The shape is L-shaped, and it is a special tool for a hexagon socket screw; 2. Hexagonal rod shape, simple and light, is specially used for turning hexagon socket screw. Specification of hexagon sp
L-type flat end ring wrench
Material: stainless steel 304316, grade 8.8 high strength and grade 12.9 high strength
It can also support non-standard customization.
I. Product Definition: A Specialized Tool Designed for Hexagon Socket Screws
The L-type flat-head inner hexagon wrench is essentially a specialized fastening tool developed for hexagon socket screws (also known as hexagon socket head screws). Its core function is to achieve the tightening and loosening of screws through precise fitting with the groove on the head of hexagon socket screws. The "L-type" in its name refers to its external structure—the rod is bent at a 90° right angle, divided into a long handle and a short handle; the "flat-head" means the head adopts a flat design, which can fully fit the top of the screw to avoid damaging the screw's appearance during force application; the "inner hexagon" emphasizes that the inner hole of the head is hexagonal, perfectly matching the outer hexagonal contour of hexagon socket screws, distinguishing it from conventional tools suitable for Phillips or slotted screws.
Compared with ordinary wrenches, its core positioning is "specialization": it is designed exclusively for hexagon socket screws, and the size of the inner hexagonal hole strictly corresponds to the opposite side dimension of the screw. There is no redundant design for universality, which gives the tool a concise "hexagonal rod" shape. It is lightweight (a single small-sized wrench weighs only 10-30 grams) and compact, allowing it to be easily carried in a tool bag and operated in narrow spaces. This completely solves the problems of "poor adaptability and cumbersome operation of universal tools".
II. Structural Features: Practical Ingenuity of L-Shaped Design
The structure of the L-type flat-head inner hexagon wrench seems simple, but it is precisely designed around "convenient operation and efficient force application". The core highlights focus on two parts: the "L-shaped rod" and the "flat-head hexagonal head".
1. L-Shaped Rod: Balancing Flexibility and Force Application
The rod is manufactured using a 90° right-angle bending process, divided into a "long handle" and a "short handle": the long handle is usually 12-25 cm in length (adjusted according to specifications), and its main function is "force application"—by virtue of the lever principle, users can hold the end of the long handle to apply force, easily amplifying the torque. Even for screws that require slightly higher torque, they can be tightened without excessive effort; the short handle is mostly 3-6 cm in length, and its core advantage is "flexibility", which can reach into narrow spaces such as deep holes inside equipment or furniture gaps, solving the problem that the long handle cannot reach.
This "one long, one short" design enables the wrench to achieve "full scenario coverage": in conventional working conditions, the long handle is used to quickly complete screw assembly and disassembly; in special spaces (such as the interior of a computer case or the narrow cavity of a lamp), the short handle can be directly inserted, and the long handle adjusts the angle outside, eliminating the need to disassemble surrounding components and greatly improving operation efficiency. For example, when installing the frame screws of roller skates, the internal space of the skate frame is narrow. The short handle can reach into the gap of the skate frame, and the long handle applies force outside to easily complete the fastening, avoiding tool jamming.
2. Flat-Head Hexagonal Head: Precise Adaptation and Damage Prevention
The head is the core working end of the tool, adopting a composite design of "flat head + inner hexagon": the opposite side dimension and depth of the inner hexagonal hole strictly match the head of the hexagon socket screw (for example, a wrench suitable for M3 screws has an inner hexagonal hole with an opposite side dimension of 3 mm). There is no gap during fitting, and no slipping occurs during force application, effectively avoiding wear on the screw groove; the flat-head design can fully fit the top plane of the screw, and the pressure is evenly distributed during force application. Unlike round-head tools, it will not leave indentations on the top of the screw, making it particularly suitable for scenarios with high appearance requirements, such as the screw fastening of lamp housings and flashlight bodies. After installation, the surface of the components can still remain flat and aesthetically pleasing.
In addition, the head and rod of the wrenches produced by our factory are manufactured using an integrated forging process, with no welding joints. The edges of the hexagonal hole undergo fine chamfering treatment (roughness ≤ Ra 0.8 μm), so there is no burr scraping when inserting the screw. This not only protects the screw from damage but also extends the service life of the tool itself. Even with frequent use, the head is not easy to deform or crack.
III. Specification System: Standardized Design Centered on Opposite Side Dimension
The specification division of the L-type flat-head inner hexagon wrench follows the principle of "precise adaptation", with the core basis being the "opposite side dimension" of the hexagon socket screw—that is, the distance between two parallel sides of the outer hexagon on the screw head. This is also the industry-universal specification standard for inner hexagon tools. The wrenches produced by our factory cover a full range from small-sized to conventional-sized products, with common models including 1.5 mm, 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, etc. For each specification of the wrench, the error of the opposite side dimension of the inner hexagonal hole is strictly controlled within ±0.02 mm, ensuring perfect fitting with the corresponding specification of hexagon socket screws.
The advantage of this standardized design lies in "universality and reliability": on the one hand, the size of hexagon socket screws itself follows international standards (such as ISO 4762), and the specifications of our factory's wrenches fully correspond to them, so users do not need to worry about the problem of "mismatch between tools and screws"; on the other hand, clear specification markings (such as "3 mm" printed on the wrench rod) allow users to quickly identify, avoiding screw stripping or tool damage caused by using the wrong specification. For example, in the electronics industry, a 2 mm wrench suitable for circuit board fixing screws and a 4 mm wrench suitable for electrical appliance housings can be directly selected by users according to the screw model, resulting in efficient operation and low error rate.
IV. Application Scenarios: A Practical Tool Covering Multiple Industries
With the characteristics of "strong specialization, light weight and flexibility", the L-type flat-head inner hexagon wrenches produced by our factory are widely used in many fields such as electronics and electrical appliances, sports equipment, lamps, roller skates, and flashlights. The selection of its application scenarios revolves around the core demand of "hexagon socket screw fastening + space constraints".
1. Electronics and Electrical Appliance Industry: The First Choice for Precision Assembly
In the production and maintenance of electronic products such as mobile phones, computers, and routers, the fixing screws of internal circuit boards and interface modules are mostly hexagon socket screws of 1.5 mm-3 mm specifications, with compact space and high precision requirements. The small-sized L-type flat-head inner hexagon wrenches produced by our factory have short handles that can reach into the gaps of the equipment shell, and long handles that facilitate fine-tuning of force application. They can not only precisely tighten the screws but also avoid touching surrounding precision components (such as capacitors and chips) to prevent circuit damage. In the assembly of household appliances such as washing machines and air conditioners, wrenches of 4 mm-6 mm specifications are used to fix motor brackets and control panels. The flat-head design can protect the paint on the appliance shell and maintain the intact appearance of the product.
2. Sports Equipment and Outdoor Products: Balancing Stability and Convenience
For sports equipment such as roller skates, bicycles, and treadmills, hexagon socket screws are often used to connect key parts (such as the wheel bracket of roller skates and the pedal of bicycles), which need to balance connection stability and assembly/disassembly convenience. The L-shaped structure of our factory's wrench allows the short handle to reach into the gap between the skate frame and the wheel set when installing the roller skate wheels, and the long handle applies force to ensure the screw is tightened, avoiding wheel set loosening during sliding; in the production of outdoor flashlights, wrenches of 3 mm-5 mm specifications are used to fix the flashlight body and lamp head. The lightweight shape is suitable for rapid operation on the production line, and the flat-head design can avoid damaging the metal or plastic shell of the flashlight, ensuring product quality.
3. Lamp and Home Furnishing Field: Emphasizing Both Aesthetics and Practicality
Modern lamps (such as ceiling lamps and chandeliers) mostly use hexagon socket screws to fix lamp shades and lamp frames, which are both hidden and aesthetically pleasing. When installing lamps, the short handle of the L-type flat-head inner hexagon wrench produced by our factory can reach into the narrow space between the lamp shade and the ceiling, and the long handle applies force easily. The flat head will not leave indentations on the top of the screw, ensuring the intact appearance of the lamp; in the home furnishing field, some high-end furniture (such as aluminum alloy frame tables and chairs) also use hexagon socket screws for connectors. The precise adaptability of the wrench can avoid damage to the furniture surface, and the L-shaped structure facilitates operation in furniture gaps, improving installation efficiency.
V. Product Advantages: Why Choose the L-Type Flat-Head Inner Hexagon Wrenches Produced by Our Factory
In the production of L-type flat-head inner hexagon wrenches, our factory focuses on "user needs" in terms of materials, processes, and quality control, forming three major advantages:
First, reliable materials: S2 tool steel is selected as the core raw material. After quenching and low-temperature tempering treatment, its hardness can reach HRC 58-62, with excellent toughness. Even with long-term use or occasional excessive force, the rod is not easy to bend or break, which is far more durable than ordinary carbon steel materials; the surface is treated with chrome plating to form a uniform rust-proof protective film, which is not easy to rust even when stored in a humid environment, extending the service life of the tool.
Second, strict precision control: Each wrench undergoes precision CNC machining, and the opposite side dimension, depth, and angle of the inner hexagonal hole are tested with special gauges to ensure adaptability to screws; details such as head chamfering and rod flatness are also subject to manual sampling inspection to avoid burrs, deformation, and other problems. Users can experience a "smooth fitting and no jamming" operation feeling during use.
Third, strong scenario adaptability: In addition to conventional specifications, our factory can also customize non-standard specifications (such as 1.2 mm small size and 12 mm large size) of wrenches according to the special needs of users to meet the needs of special fields such as electronic precision instruments and heavy-duty equipment; at the same time, we provide set packaging (such as 8-piece sets and 10-piece sets), including common specifications, with portable storage boxes for easy carrying and management by users. Whether it is a factory production line, a maintenance store, or an individual user, a suitable usage plan can be found.
As a specialized tool for hexagon socket screw fastening, the L-type flat-head inner hexagon wrench has become an indispensable practical tool in many industries with its characteristics of "simplicity, light weight, precision, and reliability". The wrenches of this type produced by our factory, with strict quality control and comprehensive specification coverage, continue to provide efficient solutions for users in the fields of electronics and electrical appliances, sports equipment, lamps, etc., and help product assembly and maintenance with professional tools, becoming a trusted partner of users.
