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JM Hardware Sems Wood Screws - Sharp Coarse Thread, Zinc/SS, ISO9001
JM Hardware Sems Wood Screws are sharp-point, coarse-thread wood fasteners with an attached (Sems) washer, offered in zinc-plated or stainless-steel finishes and made under ISO9001 quality management. They bite quickly into wood for strong, reliable holding, save assembly time by eliminating a separate washer, and offer corrosion resistance with zinc or SS options. Certified manufacturing quality plus durable, easy installation make them ideal for furniture, construction, and outdoor wood projects.
Product features
JM Hardware sems screw wood fasteners feature sharp coarse threads and are produced to ASME B18.6.4/SAE J81 and related DIN standards using materials like heat-treated C1022, SS304/SS316/SS410 with finishes including zinc plating, black/grey phosphate, nickel and ruspert, available in sizes #4–1/2" and lengths 10–180 mm. Designed to quickly and securely join wooden workpieces, these sems screw assemblies offer high holding power, selectable corrosion resistance, and consistent engagement for easier installation and reduced splitting, delivering clear value in durability and time savings. Structurally, the sharp point, coarse rolled threads and precision cold-heading ensure reliable driveability, torque performance and shear strength, backed by ISO 9001 quality control and multi-stage inspections for batch-to-batch consistency.
Team strength
Our skilled team combines decades of fastener expertise with rigorous ISO9001 processes to deliver JM Hardware Sems Wood Screws that meet demanding standards. Engineers select optimal zinc and stainless materials and design sharp, coarse threads for reliable holding power and quick driving. Production and quality teams enforce tight inspections, batch traceability, and performance testing to minimize defects and ensure consistency. Customer service and logistics coordinate on-time delivery, technical guidance, and tailored solutions for OEM and trade projects. This collaborative strength yields dependable parts, reduced installation time, and measurable cost savings, giving customers confidence in product performance and long-term supply stability.
Why choose us
Our seasoned team combines engineering expertise, precision manufacturing, and rigorous quality control to deliver JM Hardware Sems wood screws with sharp coarse threads and durable zinc/SS finishes. Core strengths include ISO9001-certified processes, experienced production supervisors, and a dedicated QC laboratory ensuring consistent thread form, tensile strength, and corrosion resistance. Value-driven services include fast, reliable order fulfillment, customized sizes and packaging, technical support for specification matching, and proactive after-sales care. Close collaboration between R&D and sales accelerates problem-solving and product improvements. The result: dependable fasteners that meet performance expectations, reduce assembly issues, and support long-term project success while meeting global standards.
Product Introduction
Wood screws are threaded fasteners that are used to join wooden workpieces. They aren’t necessarily made of wood. Rather, wood screws are available in many of the same metals and alloys as other screws. They are simply known as “wood screws” because they are designed for use with wooden workpieces
Product Parameters
| Wood screw | |
| Standard： | ASME B18.6.4 & SAE J81 DIN6928, DIN7971, DIN7972, DIN7973, DIN7976 ,DIN7981, DIN7982, DIN7983, DIN968 |
| Size: | #4(2.8)-1/2" , Length: 10-180mm (3/8”- 7”) |
| Material: | C1022+ heat treatment, SS304, SS316, SS410 |
| Finish: | zinc plated(clear/bule/yellow), black/grey phosphate,nickel, ruspert |
Product Display
Quality Control
JM Hardware conducts product quality control in strict accordance with ISO 9001 standards to ensure that our products meet high quality standards. Below are our five quality control steps:
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Incoming material control
We carry out strict incoming material control by conducting dimensional tests on each batch of raw materials and checking the raw material reports from the steel mills. This ensures that the raw materials we use are within specification and provide a reliable basis for production.
We carry out strict incoming material control by conducting dimensional tests on each batch of raw materials and checking the raw material reports from the steel mills. This ensures that the raw materials we use are within specification and provide a reliable basis for production.
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First part control
After the mold assembly is completed, we conduct a thorough inspection of the first production part and make detailed records. Only qualified first parts can be released to start mass production. This step ensures that the quality of the product meets the standard at the beginning.
After the mold assembly is completed, we conduct a thorough inspection of the first production part and make detailed records. Only qualified first parts can be released to start mass production. This step ensures that the quality of the product meets the standard at the beginning.
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Self-inspection by workers during mass production
In the mass production process, we require the workers of each machine to carry out self-inspection every hour. If any substandard product is found, we will immediately pick or scrap the production within this hour until the problem is solved and meets the standard of conformity, and then we can continue the production. This self-inspection mechanism helps to find and solve problems in time during the production process.
In the mass production process, we require the workers of each machine to carry out self-inspection every hour. If any substandard product is found, we will immediately pick or scrap the production within this hour until the problem is solved and meets the standard of conformity, and then we can continue the production. This self-inspection mechanism helps to find and solve problems in time during the production process.
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QC inspection during mass production
In addition, every two hours, the quality inspection personnel will carry out random inspection on the products of each machine. Only qualified products can continue to flow into the next production stage. If non-conforming products are found, we will take the same selection or scrapping measures and ensure that the problem is properly handled. This helps provide additional quality assurance.
In addition, every two hours, the quality inspection personnel will carry out random inspection on the products of each machine. Only qualified products can continue to flow into the next production stage. If non-conforming products are found, we will take the same selection or scrapping measures and ensure that the problem is properly handled. This helps provide additional quality assurance.
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Finished product control
Finally, after each batch of finished product is made, we conduct random inspections in proportion to the order. Qualified products will be packaged and put into storage, while unqualified products will be returned for further analysis and rectification. We insist on ensuring that the quality of our products meets high standards so that we can provide reliable products to our customers.
Finally, after each batch of finished product is made, we conduct random inspections in proportion to the order. Qualified products will be packaged and put into storage, while unqualified products will be returned for further analysis and rectification. We insist on ensuring that the quality of our products meets high standards so that we can provide reliable products to our customers.
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Non-conforming goods management
According to the process of JMhardware's non-conforming products handling, pick or scrap. And the problem of rectification and tracking reasons to ensure that non-conforming products will not flow into the market.
According to the process of JMhardware's non-conforming products handling, pick or scrap. And the problem of rectification and tracking reasons to ensure that non-conforming products will not flow into the market.
These quality control measures constitute JM Hardware's quality management system, and we are constantly striving to improve the quality of our products and are committed to meeting the needs of our customers. We believe that quality control is the key to our success.
Production equipment
Testing Equipment
Packing
Why Choose Us
Strong R&D Capability
Successfully developed 680+ new products in past 16 years
Rich Industry Experience
JM has the rich experience to supply the high quality fasteners to Project contractor
Mature & professional service teams
Provides 24/7 online and offline services for you,70%stuff have 5+ working experience in JM
Rich export experience
15+ years exported to 70+ countries
Supply one-stop service & DDP term
Help clients purchase other products,realize door-to-door service to make international procurement more convenient
Certificate
Valued Partners
JM Hardware @ has exported its hardware parts to over 85 countries around the world.
We will make unremitting efforts to provide hardware parts with high quality and reasonable prices for our customers.
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Contact us
we welcome custom designs and ideas and is able to cater to the specific requirements. for more information, please visit the website or contact us directly with questions or inquiries.
xarella.huang@jm-fastener.comOur address
Add: Rm.27202, No.295 South Lingyan Road, Pudong,Shanghai,P.R.C
Contact person: xarella.huang
Whatsapp: +86 13681923533
Wechat:+86 18621005605
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Since our establishment in 2006, JM has been adhering to the mission of creating maximum value for customers by providing differentiated services, and making a positive contribution to the society.