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Thread-forming & thread-cutting screws are suitable for creating reusable threads in metals and plastics. They are ideal for metalworking, automobile, maintenance and repair applications. Raptor Supplies offers a wide range of these screws from Grainger. These self-tapping screws need a pre-punched or drilled hole for installation / operation.
Grainger Thread-Cutting Screws:
Grainger Thread-Forming Screws:
They combine the benefits of a flat head and a domed head screw. They sit countersunk with a protruding head and are generally used in decorative applications.
They protrude half a circle above the surface for a uniform look.
They can be tightened using a wrench for more fastening torque. Selected hex heads come with a slotted drive for installation using a screwdriver.
These screws are used in cabinets, countertops, stairs, furniture & drywall as they sit flush with the surface.
Feature a triangular shank to press tightly on the material as they form / cut threads in soft metals like brass, aluminium & copper. Require less driving torque.
Have a sharp, pointed end with a narrow body for penetrating softwood or plastic-wood composites.
Feature a flat top & curved / rounded sides to prevent countersinking of the screw head into the material. Ideal for carpentry projects.
Feature a head that is rounded / oval at the top and vertical on the sides. Suitable for high-torque applications on metal or wood.
Circular top surface for protruding above the surface.
Wider head than standard rounded heads for distributing load and preventing crushing of thin metals.
Flat head having two-thirds the height of standard rounded heads.
Have machine screw threads, a blunt tapered point with entering edges, one or more cutting edges and chip removal indentations for use in steel sheets, non-ferrous casting, plastics, cast iron & brass.
Have machine screw threads with a blunt point & tapered entering edges. Provide maximum thread cutting area, excellent chip clearing & minimum tightening torque. Similar to Type F screws, but with a broader & deeper cutting edge on the point. Used in steel sheets, non-ferrous casting, plastics, cast iron & brass.
Roll or extrude threads inside a pre-drilled hole for creating a zero clearance fit without removing any material.
Have coarse or fine pitch machine screw threads with a blunt tapered point. Used for eliminating chips & permitting replacement with a standard screw on the field. Require high driving torque. Used in heavy sheet metal & die casting.
Feature spaced threads with a blunt point & incomplete entering threads for use with heavy metals. Large root diameter with fine thread pitch for light / heavy sheet metal, resinous plywood, plastics and composite boards.
Dual-spaced threads for thread engagement in soft thermoplastics, owing to high thread height & wide thread spacing. Increased pull-out resistance.
Have threads at the tip that grab the material for a fast start using low torque. Also known as Swageform screws.
Have coarse or fine pitch machine screw threads. Similar to Type C, but without a Gimlet point.
Used on wooden surfaces. Feature coarse tapping screw threads and a long-fluted sharp point for capturing chips.
Have incomplete, tapered & spaced threads with a blunt point, as well as tapered entering edges, one or more cutting edges and chip removal indentations. Ideal for use in asbestos compositions, plastics and other composites.
Corrosion, heat and fire-resistant properties with moderate structural rigidity.
Provides hardness, structural rigidity and durability.
Mild-to-high corrosion resistance in wet environments
Features black chrome layer over zinc plating for black appearance and additional protection
More corrosion resistant compared to zinc-plating in wet environments; reduces reactions between dissimilar metals
Light-to-medium corrosion resistance and minimises light reflection
Lesser corrosion resistance, but better adhesion properties than zinc plating; suitable for dry environments
As common as Phillips drives. Feature a narrow opening to fit flat-head drive tools like a slotted driver or even a coin / pocket knife.
Similar to Torx drives, but with flat edges between the lobes for a more efficient drive angle. Turn with less force than Torx drives and prevent slipping of the driver. Use with a Torx Plus driver. Don't over-tighten.
Have a hexagonal head sticking out from the surface that requires less force to tighten & loosen even when dirty / rusty / painted over. Do not have a notch that gunks up.
One of the most common types of screw driving mechanisms. Have a cross shape at the centre that prevents the screw from overtightening.
Also known as Robertson drives. Less prone to cam-out or slipping incidents than traditional Phillips head screws. Do not over-tighten.
6-pointed, star-shaped groove to use less force for turning & prevent cam-out accidents. Use with a Torx-head driver and take care not to over-tighten.
Have a conical bottom under the head for tapering down to the shank.
Used for fastening door hinges. Feature a flat, undercut, countersunk head with a flat bottom under the head.
Have a small-sized flat head & a slender shank for preventing splitting.
Grip soft or brittle plastic without cracking or splitting.
Ideal for construction, repair or maintenance tasks involving wood. Also used to join wood to metal surfaces.
Feature a small, flat head & a slender shank for preventing splitting of the boards. Thin head design prevents them from sticking out of finished surfaces.
Specialised shank tightly presses against the material (brass / aluminium / copper) to resist loosening.
Screws made from hardened steel can penetrate hard materials like sheet metal, steel or stainless steel.