Heads Screw
Screws are important through bolts used in carpentry. The use of these through bolts is mainly to join two pieces of wood together to increase the thickness of the wood and so that the strength of these two pieces would be added together.
There are many types of screws and they are classified in four ways: the type of drive, the shape of the head, the shank of the screw, and the size of the screw. Each kind of screw serves its own purpose.
Wood Screw Fixings by Drives
When we talk about screws and classify them by the type of drive that they have, we would be talking of only two things. One is the slotted drive type of screw, whilst the other would be the Philips type of drive.
The slotted drive type has a single hollow bar straight across the head of the screw. The Philips drive, on the other hand, has a cross-shaped slot on its head. Because of the shape of this slot, the Philips drive is also called the crosshead drive.
A variation of the Philips drive is the Pozidrive screw. Like the Philips drive, the Pozidrive also has a crosshead, but on all the angles created by this cross, a tiny corner juts out.
Wood Screw Fixings by Heads
We can also classify screws according to the shape of their head. Under this classification, there are three types of screws – countersunk heads, raised heads and round heads.
screws with countersunk heads are made for concealment. They are screwed tightly into the surface of the wood, where they can appear “invisible.” The raised head screw is also good for concealment but they are not as “invisible” as the countersunk-headed screws. That is because the raised head is slightly domed and can be seen on the wood.
The round-headed screw, on the other hand, is not meant to be invisible. Its large head rests in a dome right on the surface of the wood.
Wood Screw Fixings by Shanks
The shank of the screw refers to its tapering tail. All screws, regardless of their classification, have only one single appearance to their shanks – they are tapered. This tapering shank differentiates screws from screws used on metal. Screws for metal surfaces always have parallel shanks.
Wood Screw Fixings by the Size
screws are also classified according to their sizes. These sizes are determined by the length of the screw and its gauge number. The length of the screw can be measured easily – all you need to do is to apply a ruler and measure its length from head to tip.
Getting the gauge number of a screw is another matter. If you do not know the gauge of the screw through bolts that you need, then you may need to do a bit of math. Put a ruler to the diameter of the screw’s head and convert that measurement to the sixteenth of an inch. Subtract one, and then multiply the remainder by two. Whatever number you will get will yield these fixings’ gauge numbers.
Need more information about wood screws and through bolts? Find out more at http://www.jgpfixings.co.uk.
The Amazing Screw-On Head: Part One.
|
|
Stainless Steel Button Head Screw 1000-3/8-16 x 1-1/2 $360.00 |
|
|
Stainless Steel Button Head Screw 1000-3/8-16 x 1-3/4 $450.00 |
|
|
Stainless Steel Button Head Screw 1000-3/8-16 x 2 $517.50 |
|
|
Stainless Steel Button Head Screw 1000-3/8-16 x 2-1/2 $607.50 |
|
|
Stainless Steel Button Head Screw 1000-3/8-16 x 3 $675.00 |
|
|
Stainless Steel Button Head Screw 1000-3/8-16 x 3-1/2 $900.00 |
|
|
100 x 3/25″ Male Thread Flat Phillips Head Screws Fasteners $6.24 |
|
|
80 Slotted Round Head Wood Screws 8 x 2 21062 Midwest $10.00 |
|
|
38mm Thread Length Hex Dome Head PP Bolt Screw Fastener $3.62 |
|
|
20 Pcs Off White Nylon M3×10mm Thread Round Head Screw $4.28 |
|
|
135 Slotted Round Head Wood Screws 8 x 1 21059 Midwest $10.00 |
|
|
2-56 x 1/2 Nylon Fillister Head Screw 100/pkg S13026 $6.25 |
|
|
5 x 40mm Hex Socket Head Cap Fastener Bolt Screw 5 Pcs $4.30 |
|
|
25/64″ x 1 3/8″ Hex Socket Head Metal Bolt Screw 2 Pcs $4.71 |
|
|
0-80 x 3/32 Nylon Fillister Head Screw 100/pkg S13002 $10.00 |
|
|
80 Slotted Round Head Wood Screws 10 x 1-1/2 21066 MF $10.00 |
|
|
6.7mm Thread Diameter Steel Hexagonal Head Bolt Fastener Screw 10 Pcs $8.93 |
|
|
8-32 x 5/16 Nylon Fillister Head Screw 100/pkg S13076 $7.25 |
|
|
20 Pcs 3/25″ Dia 15/32″ Length Male Thread Round Head Screw Bolt $4.27 |
|
|
72 Slotted Round Head Wood Screws 12 x 1 21069 Midwest $10.00 |
|
|
Culligan FM-15A Level 3 Faucet Filter $13.49 The Culligan FM-15diy faucet mount water filtration system will improve your quality of life to the point where you’ll want to scream “Hey, Culligan man!” just to thank him for helping to make such healthful, refreshing water available. This do-it-yourself system screw-mounts to your existing water faucet and comes with everything you need for up to 200 gallons of crisp, clear water…. |
|
|
KitchenAid K45B Flat Beater Replacement for KSM90 and K45 Stand Mixer $7.20 Mix up your favorite desserts with KitchenAid’s flat beater. This nylon-coated attachment fits 4-1/2-quart KitchenAid stand mixers. The beater is perfect for mashing potatoes, mixing cake batter and cookie dough, and so much more.Amazon has certified this product’s packaging is Frustration-Free. A Frustration-Free Package is easy-to-open and comes without excess packaging materials such as hard pl… |
|
|
Mr. Bar-B-Q Oversized Finger/Rubber Grip Grill Brush Set $12.99 This 21-by-3-3/4-inch wood-handled brush tackles grill cleaning with gusto. An oversized rubber grip with thumb and finger indentations meets the demand for big hands, while brass bristles on the replaceable head last through many grill cleanings. The stainless-steel scraper on the top of the brush removes baked-on food debris, but is not meant for use on porcelain cooking grids (as scratching can… |
|
|
Army of Darkness (Screwhead Edition) [Blu-ray] $7.94 A movie that only true horror buffs could love, Army of Darkness is officially part 3 in the wild and wacky Evil Dead trilogy masterminded by the perversely inventive director Sam Raimi, who would later serve as executive producer of the popular syndicated TV series Hercules: The Legendary Journeys. Raimi’s favorite actor, Bruce Campbell, returns as Ash (hero of the first two Evil Dead flicks), a … |
|
|
Army of Darkness (Screwhead Edition) $3.85 A movie that only true horror buffs could love, Army of Darkness is officially part 3 in the wild and wacky Evil Dead trilogy masterminded by the perversely inventive director Sam Raimi, who would later serve as executive producer of the popular syndicated TV series Hercules: The Legendary Journeys. Raimi’s favorite actor, Bruce Campbell, returns as Ash (hero of the first two Evil Dead flicks), a … |
|
|
The Amazing Screw-on Head $4.38 In this hilarious send-up of Lovecraftian horror and steampunk adventure President Abraham Lincoln’s top spy is a bodyless head known only as Screw-On Head (Paul Giamatti). When arch-fiend Emperor Zombie (David Hyde Pierce) steals an artifact that will enable him to threaten all life on Earth the task of stopping him is assigned to Screw-on Head. Fortunately Screw-On Head is not alone on this peri… |
|
|
VideoSecu LCD LED TV Wall Mount Full Motion with Swivel Articulating Arm for 23-37, up to 42 in TV Flat Panel Screen With VESA 200 100, 20 in extension and Post-installation Leveling System A35 $25.00 The VideoSecu articulating mount ML530B is a mounting solution for most 22″-37″ midsize flat panels and some models up to 42inch with VESA 100×100/200×200/200×100mm mounting hole patterns. Its 9 lbs heavy gauge steel construction provides safety loading up to 66lbs display. The high-tech look mount offers 15 degrees up and down tilt, 180 degrees of swivel, 360 degrees rotation and extension up to … |
|
|
Joby GP1-A1EN Gorillapod Flexible Tripod (Grey and Black) $11.24 # Lightweight # Compact # Portable # Bendable # Wrappable # Grippable # Gorilla Fun!… |
|
|
GoPro Tripod Mount for HERO Cameras $7.95 GoPro Tripod Mount for HERO Cameras… |
|
|
Screw Head Halloween Prosthetic Our Screw Head Halloween Prosthetic includes one rubber screw with netting and step by step makeup instructions…. |