Glossary

Aluminum-compatible screws are fasteners specifically selected or engineered by custom screw manufacturers to join aluminum substrates without inducing galvanic corrosion or mechanical damage to the parent material. Because aluminum is anodic relative to many common metals, contact with dissimilar metals… Read more

Anchor Bolts are heavy-duty fasteners used to secure structural elements to concrete or masonry. They typically consist of a threaded rod with a bent or expansion end that grips the substrate. Engineers choose anchor bolts when you need reliable load… Read more

Black oxide coating is a conversion coating applied to steel fasteners, including screws and bolts. You use it to add a thin, black finish that offers mild corrosion resistance and reduces light reflection. The process involves immersing cleaned parts in… Read more

Button head socket screws are precision fasteners with a low-profile, dome-shaped head and a hexagonal socket drive. The head has a wider diameter and lower height compared to standard socket head cap screws, creating a large bearing surface while minimizing… Read more

Coarse metric threads are the standard thread profile used in most metric fasteners, defined by ISO standards. They have a larger pitch compared to fine metric threads, meaning the distance between thread peaks is wider. This design allows faster assembly… Read more

Cold forming is a metal forming process where screw blanks are shaped at room temperature by applying high pressure through dies. It forces metal flow without heating, producing precise threads and profiles with enhanced surface finish. This process reduces material… Read more

Composite deck construction screws are specialized fasteners engineered for securing composite decking boards to wood or metal joists. These screws are designed to prevent mushrooming, splitting, and surface damage often seen when standard screws are used on composite materials. They… Read more

Concrete anchor screws are construction fasteners designed to thread directly into pre-drilled holes in concrete, brick, or masonry without requiring a separate anchor insert. The hi-lo thread profile or twin-lead thread geometry cuts into the substrate material as the screw… Read more

Corrosion-resistant construction screws are fasteners engineered to withstand moisture, chemicals, and environmental exposure without rusting or degrading. These screws are used in outdoor, marine, or chemically treated environments where standard carbon steel screws would corrode quickly. They are typically made… Read more

Countersunk wood screws are fasteners featuring conical or flat tapered heads designed to sit flush with or slightly below wood surface levels, creating smooth finished appearances in carpentry and woodworking applications. Taiwan screw manufacturers countersunk wood screws typically incorporate 82-degree… Read more

Deck board screws are specialized construction fasteners engineered specifically for attaching deck boards to underlying joists and framing in exterior applications. These screws typically feature Type 17 self-drilling points for hardwood penetration, coarse thread patterns optimized for wood fiber engagement,… Read more

DIN standard screws are fasteners manufactured to dimensional and mechanical property specifications published by the Deutsches Institut fur Normung, the German standards institute. Taiwan screw manufacturers producing DIN standard screws adhere to published tolerances for head geometry, thread form, shank… Read more

A drill point tip is the shaped end of a self-drilling screw that bores into material as you drive it. You use this tip to cut a pilot hole in metal or other hard substrates without a separate drilling step.… Read more

Flat head machine screws are precision-threaded fasteners with a countersunk head designed to sit flush with or below the surface of the material being fastened. The head features a flat top and angled underside, typically at 82 degrees for metric… Read more

Galvanic corrosion occurs when two different metals connect in an electrolyte, such as saltwater or moisture. In this electrochemical reaction, one metal becomes the anode and corrodes more rapidly, while the other becomes the cathode and remains protected. You often… Read more

Hex head construction screws are heavy-duty fasteners featuring a six-sided head designed for use with a wrench or hex driver. These screws are commonly used in structural framing, decking, and heavy timber construction due to their strong drive engagement and… Read more

Hex washer head screws are self-contained fasteners featuring a hexagonal head with an integrated washer flange on the underside. The built-in washer eliminates the need for separate washers during installation and provides a larger bearing surface to distribute clamping load… Read more

High corrosion resistance screws are fasteners engineered through advanced material selection, surface treatments, or protective coatings to prevent oxidation and degradation in chemically aggressive or moisture-laden environments. Custom screw manufacturers high corrosion resistance screws typically employ stainless steel alloys (304,… Read more

Hot forging is a metal forming process in which screws and fastener blanks are heated above their recrystallization temperature and then shaped by compressive forces. You heat the workpiece to 950–1250 °C to increase its ductility, then press it into… Read more

ISO certified screws are fasteners produced by Taiwan screw manufacturers operating under a quality management system certified to ISO 9001 or a product-specific certification confirming conformance to dimensional, mechanical, and material standards published by the International Organization for Standardization. ISO… Read more

Precision fasteners ISO metric threads represent the internationally standardized threading system defined by ISO 68-1 and ISO 261 standards. This threading specification establishes precise relationships between thread pitch and nominal diameter, creating a universal system for screw thread engagement across… Read more

Marine grade stainless steel screws are specialized construction fasteners manufactured from austenitic stainless steel alloys, primarily Type 316 or 316L, specifically engineered to withstand harsh coastal and marine environments. These fasteners contain molybdenum (2-3%), which provides exceptional resistance to chloride-induced… Read more

Metal roofing screws are specialized construction fasteners designed for attaching metal panels to wood or steel purlins in roofing applications, featuring self-drilling points that penetrate steel substrates without pre-drilling, integrated EPDM or neoprene sealing washers for weatherproof installation, and corrosion-resistant… Read more

A nylok coating is a thin layer of nylon applied inside or around nut threads to create friction that resists loosening. You use this coating on nuts and bolts when you need vibration resistance in assemblies. The nylon insert grips… Read more

Pan head machine screws are threaded fasteners with a wide, flat bearing surface and a rounded, slightly domed head. Designed for use with tapped holes or nuts, these screws offer a clean finish and are ideal for applications where a… Read more

Pitch angle is the helix angle formed between a screw thread’s helical ridge and a plane that is perpendicular to the fastener’s central axis. Measured at the pitch diameter, it tells you how steeply the thread wraps around the shank.… Read more

Ruspert Silver Coating is a multi-layer ceramic-based surface treatment designed to provide high corrosion resistance to fasteners and metal parts. It typically consists of three layers: a metallic zinc base coat, a chemical conversion layer, and a baked ceramic top… Read more

Self tapping construction screws are specialized fasteners designed to cut their own mating threads as they are driven into materials like wood, metal, or plastic. In construction, they are widely used to speed up assembly and ensure a secure fit… Read more

Construction fasteners sheet metal screws are specialized self-tapping fasteners engineered to form or cut threads directly into sheet metal, eliminating the requirement for pre-threaded holes and streamlining assembly processes. These fasteners feature relatively coarse thread pitches with steep helix angles… Read more

Custom screw manufacturers square drive screws incorporate a square-shaped socket recess that accepts corresponding square drive bits, providing enhanced torque transmission capabilities compared to traditional drive systems. The square drive configuration, also known as Robertson drive after its Canadian inventor,… Read more

Stainless steel construction screws are threaded fasteners made from corrosion-resistant stainless steel, specifically designed for structural and framing applications. They are commonly used in wood, concrete, and metal construction where long-term durability and weather resistance are critical. These screws often… Read more

Stainless steel self tapping screws are corrosion-resistant fasteners that cut or form their own threads as they are driven into pre-drilled pilot holes. Manufactured from austenitic stainless steel grades like 304 or 316, these screws resist rust, oxidation, and chemical… Read more

Structural grade screws are construction fasteners that meet defined minimum mechanical property thresholds for use in load-bearing and shear-transferring assemblies. Unlike standard fasteners, structural grade screws are manufactured to documented tensile strength, shear strength, and proof load values published in… Read more

Thread diameter is the major or nominal diameter of a threaded fastener measured across the tips of its external threads or the roots of internal threads. It defines the fastener’s size and fit in mating holes and nuts. You use… Read more

Thread engagement is the portion of a screw’s threaded length that fully mates with internal threads in a tapped hole or nut. It is measured in thread turns or linear length and determines the shear area available to resist axial… Read more

Industrial fasteners thread locking compounds are specialized anaerobic adhesives that cure in the absence of oxygen within the confined space of engaged threads, creating a thermoset plastic that fills the clearances between male and female thread forms. These chemical retention… Read more

Thread pitch is the distance between adjacent thread peaks measured parallel to a fastener’s axis. It tells you how tightly the threads are spaced on screws, bolts, and studs. You select pitch to balance load capacity, assembly speed, and resistance… Read more

Thread profiles describe the shape and geometry of screw threads. You examine the cross-sectional form of the thread including root, crest, and flank angles. Common profiles include unified, metric, Acme, and buttress. The profile affects strength, sealing, and ease of… Read more

Threads Per Inch (TPI) is the count of thread crests within one inch of a fastener’s length in imperial systems. You use TPI to describe how coarse or fine a screw thread is. Lower TPI indicates coarse threads with fewer… Read more

Torque-resistant drive screws are construction fasteners engineered with reinforced drive recesses that withstand elevated installation torque without cam-out or recess deformation. The geometry of the drive interface, whether Torx, square, or hexalobular, distributes rotational force across multiple contact points rather… Read more

A Torx drive head is a type of screw drive characterized by a six-point star-shaped pattern. Also known as a star drive, it is designed to transfer torque more efficiently than traditional slotted or Phillips heads. Torx heads reduce the… Read more

Torx security screws are tamper-resistant fasteners with a six-point star-shaped drive and a central pin. Unlike standard Torx screws, these include a post in the center to prevent the use of regular Torx drivers. They are also known as tamper-proof… Read more

Type 17 screws have a distinct thread profile and a built-in drill point at the tip. They combine a coarse thread with a sharp flute that cuts into wood and plastics, eliminating the need for pilot holes. You install them… Read more

Precision fasteners undercut flat head screws incorporate a unique head geometry where the cylindrical bearing surface diameter is reduced compared to standard flat head screws, while maintaining the traditional countersink angle (typically 82 or 90 degrees). This undercut design creates… Read more

Yellow zinc coating (Also known as Zinc Chromate Coating) is a thin layer of zinc applied to steel fasteners by electroplating, followed by a yellow chromate conversion finish. It protects screws and bolts from corrosion and offers a decorative gold… Read more

Zinc nickel alloy coating is an electroplated finish that applies a uniform layer of zinc and nickel on metal surfaces. You use this finish to improve corrosion resistance and wear performance in demanding environments. The coating mixes zinc’s sacrificial protection… Read more

Zinc plated steel screws are carbon steel fasteners coated with a thin layer of zinc through electroplating to provide corrosion protection. The zinc coating typically ranges from 5 to 25 microns thick and acts as a sacrificial barrier that corrodes… Read more