There doesn't seem to be a real agreed upon standard for when to use each term. Machine screw or machine bolt? Lag screw or lag bolt? etc...
2007-03-18 17:20:34 · 9 answers · asked by theegorider 2 in Home & Garden ➔ Maintenance & Repairs
i was taught that a screw goes into wood or threaded metal and doesnt require a nut. a bolt goes through wood or metal with a nut on the end. who knows...
2007-03-19 02:46:16 · answer #1 · answered by Anonymous · 0⤊ 0⤋
I always thought a bolt had the type of an edged head that could be turned with a pliers or grip type apparatus, as well, in some cases as by a flat bladed screw driver. The end of a bolt is flat or 'sawed off' and is fitted with a nut to secure it in place..
A screw has a rounded head with a slot or cross and requires a flat or hex head driver to turn it in place. A screw has a pointed end and can be self tapping. Screws are generally used with wood. Bolts are generally used with metal. But not always in either case..
(From a grandmother---Now lets see what the real metal and wood workers say....)
2007-03-18 17:33:06 · answer #2 · answered by Lifestooshort 2 · 0⤊ 0⤋
Hi, The screw category, is all sizes to 1/4".(usually) Than their called bolts. There are Wood Screws, and can be flat head made to countersink into the material it's being put into. Also the top shaft of a wood screw is smooth to enable it to be drawn smoothly into the wood ,following the threads.Than there are ,Oval head,pan head,hex head,round head.There are different grades of metal, Slotted or Philips,and a whole array of newer ones. There are also,Galvanized,Stainless Steel, Zinc plated,Chrome plated, Now Lets get along to the Bolt section,There are Carriage Bolts,which will have a round head called Carriage head,there's also Hex Head. Lag Bolts,have a Hex head, I've never seen a round headed lag, but I'm sure they make them.There's Anchor Bolts,Anchor screws,Eye bolts, eye screws,Foundation Bolts,Stop Bolts ,Chain bolts...On and On.Want to learn about the Nails now?
2007-03-19 00:38:52 · answer #3 · answered by sandeespacecase 2 · 0⤊ 1⤋
A screw is tapered at the end to drive straight into wood, metal, whatever. Bolts are flat ended. Needing a hole drilled first. For me, if I can, I would go with a bolt for strength every time.
2007-03-18 17:40:53 · answer #4 · answered by EYES WIDE OPEN 2 · 0⤊ 0⤋
Let`s just call em fasteners!!!!! Technically bolts are screws. They have an inclined plane wrapped around an axis. Obviously the difference is in the number of wraps per inch.(basically) Your "terms": lag, machine, wood, bolt, are added to designate different configurations and applications.
2007-03-18 21:34:09 · answer #5 · answered by william v 5 · 0⤊ 1⤋
screws have their threads apart so they can dig in to the wood bolts have their threads close together and need a nut or lock nut to keep them together lag screws and lag bolt are the same
2007-03-18 23:30:43 · answer #6 · answered by boobman 1959 aka cliff 3 · 0⤊ 0⤋
A bolt is flat at the end,usually comes with a nut. A screw is pointed at the end. (I think) lol
2007-03-18 17:23:23 · answer #7 · answered by Terri R 6 · 3⤊ 1⤋
problematic stuff. look into from google. just that will help!
2014-11-25 21:42:29 · answer #8 · answered by Anonymous · 0⤊ 0⤋
screws don't need nuts
2007-03-18 17:23:32 · answer #9 · answered by TEBOE7 3 · 0⤊ 0⤋