Non-standard Screws

Haiyan Jinrun Metal Products Co., Ltd. is a manufacturer of non-standard screws, various kinds of non-standard screws, non-standard drilling nails and non-standard self-tapping nails, materials include carbon steel and stainless steel, specifications include: Specifications from ST3.5, ST3.9, ST4.2 ST4.8, ST5.5, ST6.3, length from 13 mm - 150 mm, surface treatment of electric galvanizing, phosphating, ruspert, hot dip galvanized, mechanical zinc plating, dacromet, etc., according to the customer to provide customized non-standard screw drawing, provide samples, according to the size of the sample, Provide the drawings of our factory, mark the tolerances of each part, and sample after customer's confirmation. Non-standard screws are generally made first, and the sample is confirmed by the customer after there is no problem, to ensure that the good quality non-standard screws are provided to the customer. The company has a professional testing team and testing equipment, including hardness machine, tapping speed machine, torque wrench, salt spray testing machine, tension machine, etc. After the production of non-standard screw samples, the inspector will test the appearance and size of the products, and then test the mechanical properties of the products after electroplating, issue a test report to ensure that the qualified non-standard screw samples are provided to customers. High-quality raw materials, cheap non-standard screws, good quality non-standard screws, professional testing technical support, perfect company management concept, customizable non-standard screws, looking forward to your consultation and cooperation.

Non-standard screw products are composed of head, rod thread and thread end, head shapes are various, mainly: hexagonal washer head, hexagonal flange head, countersunk head, pan head, half round head, improved head row frame, horn head, flat round and so on. The screw screw mode of the head is: The  screw mode refers to the way to twist the screw head when installing and fastening the screw, and the basic way is internal screw screw and external screw screw. Internal screw: Cross groove H type, one slot, cross groove Z type, cross groove F type, square groove, composite groove, internal spline, internal triangle, hex, internal 12 Angle, clutch groove, six blade groove, high torque cross groove, etc. External wrench: hexagonal flange, hexagonal flange, hexagonal flower shape, etc. In general, the external wrench allows more torque than any form of internal wrench (internal groove). Non-standard screw rod thread includes half thread and full thread, rod can also be knurled, thread types are self-tapping thread (wide tooth thread), machine thread (ordinary thread), drywall screw thread, fiberboard screw thread, and some other special thread. In addition, the thread can be divided into single leads (single head), double leads (double head), multiple leads (multiple heads) and high and low teeth double head threads. The end forms are mainly cone end and end two. However, according to the needs of use, the end of the screwing part can be processed with cutting functions of trenches, slots, notches or parts similar to the shape of drill bits. After the specific shape and size are provided by the customer, our professional technical department can confirm whether it can be produced after analysis.

Non-standard screws play a pivotal role in industrial production. Product quality can not be sloppy must be strictly in accordance with the corresponding standards of production acceptance, then what are the acceptance standards of non-standard screws?

1, the first non-standard screw is also the evolution of the national standard screw, but also according to the national standard screw surface defect standard, to determine the specific detection items, in this respect, please refer to the corresponding national standards, if the surface coating, coating affect the identification of surface defects, it should be picked out before inspection.

2, according to the requirements of the design drawings of the non-standard screw size and material inspection, this should pay attention to the detection of the material:

One: The raw material manufacturer should provide the material certificate report.

Two: High-end products must be certified by SGS material, and sent to the relevant laboratory for material composition analysis to confirm whether the composition content meets the material requirements of the drawing.

Three, non-destructive inspection of non-standard screws, if there are any parts of the quench crack, support surface and wrinkles below the inspection, and whether the coating meets the Rosh environmental protection requirements.

Four, such as non-standard screw hardness level to do the corresponding hardness impact test; Internal hardness, mechanical properties, torsion testing, etc., will damage non-standard screws, but the screw factory with a strong concept of quality must do testing items.

Fastening screws on our ordinary market are generally standardized and standardized production, and for some non-standard products, standardized screws are not applicable. The advantage of choosing non-standard screws is that it can be developed and designed according to the user's own needs, produce suitable screws, and solve the problems such as fastening and screw length that can not be solved by standard screws. Non-standard screw customization reduces the production cost of enterprises, non-standard screws can be designed according to the needs of users, produce the right screws. The shape, length and material of the screw are fitted with the product, saving a lot of waste, not only can save costs, but also improve the production efficiency of the appropriate screw fasteners. In the era of rising labor costs, reducing the production cost of enterprises is undoubtedly increasing the competitiveness of the entire enterprise.

The benefits and advantages of non-standard screws also include: 1) provide higher connection strength and better sealing performance, which can ensure the safety and reliability of the connector. 2) It can be designed and manufactured according to specific application requirements and can meet special engineering needs. 3) Can provide greater flexibility, can choose different materials, sizes and shapes. 4) Can reduce inventory costs, because non-standard screws can be customized and produced according to needs.

Non-standard screw customization without production worries, our company engaged in non-standard screw customization for more than 15 years, has a wealth of production and processing experience, as long as you provide non-standard screw requirements, we can produce non-standard fasteners to your satisfaction.