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Question:

>IMHO Screws usually have slotted, Phillips heads that require a screwdriver >to put them in place. >Once the head becomes square or Hex head then it is more likely to be >referred toa s bolt. >But !!  Lag bolts have hex or square heads and they are really screws as >they do not have a uniform diameter. >This could become an interesting discussion. Is there a prize for the right >answer ?

‘fraid not. Lots of interesting replys however. I think my next question will be, "which came first, the chicken or the egg."       (yes, I know, it was the rooster.)

Response:

> I think my next question will be, "which came first, the chicken or > the egg."       (yes, I know, it was the rooster.)

Well, are you ready for the correct answer? 1. The thread is the screw. 2. The shank is the bolt.  A bolt doesn’t necessarily have      threads. . . as in cross-bolt, bolt-action, etc. . . Q:  What did the nut say to the screw? A:  No! Not without a washer!

Response:

>Generally a screw contains thread over the entire length of the "shaft" >while bolts have a section of unthreaded "shaft" closest to the head. >Regards, >Wayne Madden

Main difference is the head, and consequently the tools used to turn them. Machine screws have slotted, Phillips, Robertson, Allen, or TORX heads, and are turned with screwdrivers. Bolts have hexagonal or square heads, and are turned with wrenches. > When does a machine screw become a bolt? > What are the specs for a machine screw vs a bolt? > TIA

– alphageek/at/milmac/dot/com Stop Partial-birth Abortion NOW! End religious persecution in China – boycott Chinese goods. Ted Kennedy’s car has killed more people than my gun.

Response:

> When does a machine screw become a bolt? > What are the specs for a machine screw vs a bolt? > TIA

Check with  rec.crafts.metalworking   newsgroup, dont let the name turn you down, most of the people there are machinest or engineers and can give you the correct answer if there is one.. hope this helps.

Response:

Generally a screw contains thread over the entire length of the "shaft" while bolts have a section of unthreaded "shaft" closest to the head. Regards, Wayne Madden

– Hide quoted text — Show quoted text -> When does a machine screw become a bolt? > What are the specs for a machine screw vs a bolt? > TIA

Response:

IMHO Screws usually have slotted, Phillips heads that require a screwdriver to put them in place. Once the head becomes square or Hex head then it is more likely to be referred toa s bolt. But !!  Lag bolts have hex or square heads and they are really screws as they do not have a uniform diameter. This could become an interesting discussion. Is there a prize for the right answer ? — Have a GREAT Day George

– Hide quoted text — Show quoted text -> When does a machine screw become a bolt? > What are the specs for a machine screw vs a bolt? > TIA

Response:

> When does a machine screw become a bolt? > What are the specs for a machine screw vs a bolt? > TIA

Back a centrury or so ago, I was put in charge of the inventory control mess for a small company, and this was a burning issue among certain argumentative types. Like a good trouper, I set out to find the definitive answer from hardware manufacturers. Result: There isn’t one — that is why there is an argument. Most people make the change from "screw" to "bolt" at around 1/4 inch. — Best regards, Anthony Straight propietor, Tony Electric http://dotznize.com/electric

Response:

When does a machine screw become a bolt? What are the specs for a machine screw vs a bolt? TIA

Response:

<< When does a machine screw become a bolt? What are the specs for a machine screw vs a bolt? >> Buzz down to your local library and drag a copy of  "Machinery’s Handbook" off the shelf. All the differences will be clear when you digest the 2500 pages or so of small type. Part of your curiosity might be semantics.  For that, any good dictionary will do. Rightly or wrongly, my impression is that bolts are intended to be used with nuts, and machine screws  commonly thread into something other than a nut. If you come up with more positive definitions, it should be good for winning a few bar bets. Have fun. Joe

Response:

>IMHO Screws usually have slotted, Phillips heads that require a screwdriver >to put them in place. >Once the head becomes square or Hex head then it is more likely to be >referred toa s bolt. >But !!  Lag bolts have hex or square heads and they are really screws as >they do not have a uniform diameter. >This could become an interesting discussion. Is there a prize for the right >answer ?

‘fraid not. Lots of interesting replys however. I think my next question will be, "which came first, the chicken or the egg."       (yes, I know, it was the rooster.)

Response:

> I think my next question will be, "which came first, the chicken or > the egg."       (yes, I know, it was the rooster.)

Well, are you ready for the correct answer? 1. The thread is the screw. 2. The shank is the bolt.  A bolt doesn’t necessarily have      threads. . . as in cross-bolt, bolt-action, etc. . . Q:  What did the nut say to the screw? A:  No! Not without a washer!

Response:

>Generally a screw contains thread over the entire length of the "shaft" >while bolts have a section of unthreaded "shaft" closest to the head. >Regards, >Wayne Madden

Main difference is the head, and consequently the tools used to turn them. Machine screws have slotted, Phillips, Robertson, Allen, or TORX heads, and are turned with screwdrivers. Bolts have hexagonal or square heads, and are turned with wrenches. > When does a machine screw become a bolt? > What are the specs for a machine screw vs a bolt? > TIA

– alphageek/at/milmac/dot/com Stop Partial-birth Abortion NOW! End religious persecution in China – boycott Chinese goods. Ted Kennedy’s car has killed more people than my gun.

Response:

> When does a machine screw become a bolt? > What are the specs for a machine screw vs a bolt? > TIA

Check with  rec.crafts.metalworking   newsgroup, dont let the name turn you down, most of the people there are machinest or engineers and can give you the correct answer if there is one.. hope this helps.

Response:

Generally a screw contains thread over the entire length of the "shaft" while bolts have a section of unthreaded "shaft" closest to the head. Regards, Wayne Madden

– Hide quoted text — Show quoted text -> When does a machine screw become a bolt? > What are the specs for a machine screw vs a bolt? > TIA

Response:

IMHO Screws usually have slotted, Phillips heads that require a screwdriver to put them in place. Once the head becomes square or Hex head then it is more likely to be referred toa s bolt. But !!  Lag bolts have hex or square heads and they are really screws as they do not have a uniform diameter. This could become an interesting discussion. Is there a prize for the right answer ? — Have a GREAT Day George

– Hide quoted text — Show quoted text -> When does a machine screw become a bolt? > What are the specs for a machine screw vs a bolt? > TIA

Response:

> When does a machine screw become a bolt? > What are the specs for a machine screw vs a bolt? > TIA

Back a centrury or so ago, I was put in charge of the inventory control mess for a small company, and this was a burning issue among certain argumentative types. Like a good trouper, I set out to find the definitive answer from hardware manufacturers. Result: There isn’t one — that is why there is an argument. Most people make the change from "screw" to "bolt" at around 1/4 inch. — Best regards, Anthony Straight propietor, Tony Electric http://dotznize.com/electric

Response:

When does a machine screw become a bolt? What are the specs for a machine screw vs a bolt? TIA

Response:

<< When does a machine screw become a bolt? What are the specs for a machine screw vs a bolt? >> Buzz down to your local library and drag a copy of  "Machinery’s Handbook" off the shelf. All the differences will be clear when you digest the 2500 pages or so of small type. Part of your curiosity might be semantics.  For that, any good dictionary will do. Rightly or wrongly, my impression is that bolts are intended to be used with nuts, and machine screws  commonly thread into something other than a nut. If you come up with more positive definitions, it should be good for winning a few bar bets. Have fun. Joe

Response: