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grade 5 bolts not marked if galvanized?
Is there an issue using a stainless steel bolt with a hot-dip galvanized nut and washer?Bolt hole reinforcement? For barrel boltsName of door/cabinet knob that operates two bolts at once
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I went to a local building supply company - one that tends to have a better selection than the big-box places - seeking some Grade 5 carriage bolts.
They pointed me to bins of galvanized carriage bolts. I checked and did not see the 3 radial lines that normally mark Grade 5. They said "galvanized bolts do not have the marking, but rest assured they are Grade 5"; in fact, I believe they implied that galvanized are always Grade 5 (or higher).
I tend to think they are lying or misinformed, but thought I would seek clarification.
hardware
asked 8 hours ago
RustyShacklefordRustyShackleford
4726 silver badges20 bronze badges
add a comment |
I went to a local building supply company - one that tends to have a better selection than the big-box places - seeking some Grade 5 carriage bolts.
They pointed me to bins of galvanized carriage bolts. I checked and did not see the 3 radial lines that normally mark Grade 5. They said "galvanized bolts do not have the marking, but rest assured they are Grade 5"; in fact, I believe they implied that galvanized are always Grade 5 (or higher).
I tend to think they are lying or misinformed, but thought I would seek clarification.
hardware
asked 8 hours ago
RustyShacklefordRustyShackleford
4726 silver badges20 bronze badges
I'm using these to hang an old-school Hunter ceiling fan, the kind that are cast iron and weigh about 50lb. With the poor quality of hardware I've seen recently, I think it's worth getting graded bolts. I can always order them from places like boltdepot, but I would like to source locally.
– RustyShackleford
8 hours ago
Do you need galvanized? Big box stores do sell grade 5 and grade 8 bolts. Auto parts stores are another source.
– JPhi1618
7 hours ago
I don't need galvanized; that's just where they sent me when I said I needed Grade 5.
– RustyShackleford
7 hours ago
My assumption was that galvanized bolts are not graded and are low grade. Just go to an Ace or Lowes or Home Depot, but I'd be interested if anyone knows better about galvanized.
– JPhi1618
7 hours ago
Those places MIGHT have grade 5 hex bolts, but not carriage.
– RustyShackleford
7 hours ago
add a comment |
I went to a local building supply company - one that tends to have a better selection than the big-box places - seeking some Grade 5 carriage bolts.
They pointed me to bins of galvanized carriage bolts. I checked and did not see the 3 radial lines that normally mark Grade 5. They said "galvanized bolts do not have the marking, but rest assured they are Grade 5"; in fact, I believe they implied that galvanized are always Grade 5 (or higher).
I tend to think they are lying or misinformed, but thought I would seek clarification.
hardware
asked 8 hours ago
RustyShacklefordRustyShackleford
4726 silver badges20 bronze badges
I went to a local building supply company - one that tends to have a better selection than the big-box places - seeking some Grade 5 carriage bolts.
They pointed me to bins of galvanized carriage bolts. I checked and did not see the 3 radial lines that normally mark Grade 5. They said "galvanized bolts do not have the marking, but rest assured they are Grade 5"; in fact, I believe they implied that galvanized are always Grade 5 (or higher).
I tend to think they are lying or misinformed, but thought I would seek clarification.
hardware
hardware
asked 8 hours ago
RustyShacklefordRustyShackleford
4726 silver badges20 bronze badges
asked 8 hours ago
RustyShacklefordRustyShackleford
4726 silver badges20 bronze badges
edited 7 hours ago
RustyShackleford
asked 8 hours ago
RustyShacklefordRustyShackleford
4726 silver badges20 bronze badges
asked 8 hours ago
RustyShacklefordRustyShackleford
4726 silver badges20 bronze badges
asked 8 hours ago
RustyShacklefordRustyShackleford
4726 silver badges20 bronze badges
4726 silver badges20 bronze badges
I'm using these to hang an old-school Hunter ceiling fan, the kind that are cast iron and weigh about 50lb. With the poor quality of hardware I've seen recently, I think it's worth getting graded bolts. I can always order them from places like boltdepot, but I would like to source locally.
– RustyShackleford
8 hours ago
Do you need galvanized? Big box stores do sell grade 5 and grade 8 bolts. Auto parts stores are another source.
– JPhi1618
7 hours ago
I don't need galvanized; that's just where they sent me when I said I needed Grade 5.
– RustyShackleford
7 hours ago
My assumption was that galvanized bolts are not graded and are low grade. Just go to an Ace or Lowes or Home Depot, but I'd be interested if anyone knows better about galvanized.
– JPhi1618
7 hours ago
Those places MIGHT have grade 5 hex bolts, but not carriage.
– RustyShackleford
7 hours ago
add a comment |
I'm using these to hang an old-school Hunter ceiling fan, the kind that are cast iron and weigh about 50lb. With the poor quality of hardware I've seen recently, I think it's worth getting graded bolts. I can always order them from places like boltdepot, but I would like to source locally.
– RustyShackleford
8 hours ago
Do you need galvanized? Big box stores do sell grade 5 and grade 8 bolts. Auto parts stores are another source.
– JPhi1618
7 hours ago
I don't need galvanized; that's just where they sent me when I said I needed Grade 5.
– RustyShackleford
7 hours ago
My assumption was that galvanized bolts are not graded and are low grade. Just go to an Ace or Lowes or Home Depot, but I'd be interested if anyone knows better about galvanized.
– JPhi1618
7 hours ago
Those places MIGHT have grade 5 hex bolts, but not carriage.
– RustyShackleford
7 hours ago
I'm using these to hang an old-school Hunter ceiling fan, the kind that are cast iron and weigh about 50lb. With the poor quality of hardware I've seen recently, I think it's worth getting graded bolts. I can always order them from places like boltdepot, but I would like to source locally.
– RustyShackleford
8 hours ago
I'm using these to hang an old-school Hunter ceiling fan, the kind that are cast iron and weigh about 50lb. With the poor quality of hardware I've seen recently, I think it's worth getting graded bolts. I can always order them from places like boltdepot, but I would like to source locally.
– RustyShackleford
8 hours ago
Do you need galvanized? Big box stores do sell grade 5 and grade 8 bolts. Auto parts stores are another source.
– JPhi1618
7 hours ago
Do you need galvanized? Big box stores do sell grade 5 and grade 8 bolts. Auto parts stores are another source.
– JPhi1618
7 hours ago
I don't need galvanized; that's just where they sent me when I said I needed Grade 5.
– RustyShackleford
7 hours ago
I don't need galvanized; that's just where they sent me when I said I needed Grade 5.
– RustyShackleford
7 hours ago
My assumption was that galvanized bolts are not graded and are low grade. Just go to an Ace or Lowes or Home Depot, but I'd be interested if anyone knows better about galvanized.
– JPhi1618
7 hours ago
My assumption was that galvanized bolts are not graded and are low grade. Just go to an Ace or Lowes or Home Depot, but I'd be interested if anyone knows better about galvanized.
– JPhi1618
7 hours ago
Those places MIGHT have grade 5 hex bolts, but not carriage.
– RustyShackleford
7 hours ago
Those places MIGHT have grade 5 hex bolts, but not carriage.
– RustyShackleford
7 hours ago
add a comment |
2 Answers
2
active
oldest
votes
Highly unlikely that a Grade 5 bolt (90.000 psi yield, depending on size) would be galvanized. If electro-galvanizing were used these is a high risk of hydrogen cracking at that hardness level. If it were hot dip galvanized, the required temperature of about 800 F would temper the steel to a lower strength. This tempering affect can be fixed using alloy like chrome/moly, but now you have a pretty expensive bolt; not one available in a hardware store.
edited 2 hours ago
isherwood
56.8k5 gold badges68 silver badges150 bronze badges
answered 3 hours ago
blacksmith37blacksmith37
2,0013 silver badges9 bronze badges
add a comment |
I have not seen a carriage bolt in grade 5 or higher. If you want a bolt that will resist rusting then you should use grade 8 bolts. They are so hard that rusting is almost non existent.
answered 5 hours ago
d.georged.george
6,5332 gold badges8 silver badges15 bronze badges
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
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active
oldest
votes
Highly unlikely that a Grade 5 bolt (90.000 psi yield, depending on size) would be galvanized. If electro-galvanizing were used these is a high risk of hydrogen cracking at that hardness level. If it were hot dip galvanized, the required temperature of about 800 F would temper the steel to a lower strength. This tempering affect can be fixed using alloy like chrome/moly, but now you have a pretty expensive bolt; not one available in a hardware store.
edited 2 hours ago
isherwood
56.8k5 gold badges68 silver badges150 bronze badges
answered 3 hours ago
blacksmith37blacksmith37
2,0013 silver badges9 bronze badges
add a comment |
Highly unlikely that a Grade 5 bolt (90.000 psi yield, depending on size) would be galvanized. If electro-galvanizing were used these is a high risk of hydrogen cracking at that hardness level. If it were hot dip galvanized, the required temperature of about 800 F would temper the steel to a lower strength. This tempering affect can be fixed using alloy like chrome/moly, but now you have a pretty expensive bolt; not one available in a hardware store.
edited 2 hours ago
isherwood
56.8k5 gold badges68 silver badges150 bronze badges
answered 3 hours ago
blacksmith37blacksmith37
2,0013 silver badges9 bronze badges
add a comment |
Highly unlikely that a Grade 5 bolt (90.000 psi yield, depending on size) would be galvanized. If electro-galvanizing were used these is a high risk of hydrogen cracking at that hardness level. If it were hot dip galvanized, the required temperature of about 800 F would temper the steel to a lower strength. This tempering affect can be fixed using alloy like chrome/moly, but now you have a pretty expensive bolt; not one available in a hardware store.
edited 2 hours ago
isherwood
56.8k5 gold badges68 silver badges150 bronze badges
answered 3 hours ago
blacksmith37blacksmith37
2,0013 silver badges9 bronze badges
Highly unlikely that a Grade 5 bolt (90.000 psi yield, depending on size) would be galvanized. If electro-galvanizing were used these is a high risk of hydrogen cracking at that hardness level. If it were hot dip galvanized, the required temperature of about 800 F would temper the steel to a lower strength. This tempering affect can be fixed using alloy like chrome/moly, but now you have a pretty expensive bolt; not one available in a hardware store.
edited 2 hours ago
isherwood
56.8k5 gold badges68 silver badges150 bronze badges
answered 3 hours ago
blacksmith37blacksmith37
2,0013 silver badges9 bronze badges
edited 2 hours ago
isherwood
56.8k5 gold badges68 silver badges150 bronze badges
edited 2 hours ago
isherwood
56.8k5 gold badges68 silver badges150 bronze badges
edited 2 hours ago
isherwood
56.8k5 gold badges68 silver badges150 bronze badges
56.8k5 gold badges68 silver badges150 bronze badges
answered 3 hours ago
blacksmith37blacksmith37
2,0013 silver badges9 bronze badges
answered 3 hours ago
blacksmith37blacksmith37
2,0013 silver badges9 bronze badges
answered 3 hours ago
blacksmith37blacksmith37
2,0013 silver badges9 bronze badges
2,0013 silver badges9 bronze badges
add a comment |
add a comment |
I have not seen a carriage bolt in grade 5 or higher. If you want a bolt that will resist rusting then you should use grade 8 bolts. They are so hard that rusting is almost non existent.
answered 5 hours ago
d.georged.george
6,5332 gold badges8 silver badges15 bronze badges
add a comment |
I have not seen a carriage bolt in grade 5 or higher. If you want a bolt that will resist rusting then you should use grade 8 bolts. They are so hard that rusting is almost non existent.
answered 5 hours ago
d.georged.george
6,5332 gold badges8 silver badges15 bronze badges
add a comment |
I have not seen a carriage bolt in grade 5 or higher. If you want a bolt that will resist rusting then you should use grade 8 bolts. They are so hard that rusting is almost non existent.
answered 5 hours ago
d.georged.george
6,5332 gold badges8 silver badges15 bronze badges
I have not seen a carriage bolt in grade 5 or higher. If you want a bolt that will resist rusting then you should use grade 8 bolts. They are so hard that rusting is almost non existent.
answered 5 hours ago
d.georged.george
6,5332 gold badges8 silver badges15 bronze badges
answered 5 hours ago
d.georged.george
6,5332 gold badges8 silver badges15 bronze badges
answered 5 hours ago
d.georged.george
6,5332 gold badges8 silver badges15 bronze badges
answered 5 hours ago
d.georged.george
6,5332 gold badges8 silver badges15 bronze badges
6,5332 gold badges8 silver badges15 bronze badges
add a comment |
add a comment |
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I'm using these to hang an old-school Hunter ceiling fan, the kind that are cast iron and weigh about 50lb. With the poor quality of hardware I've seen recently, I think it's worth getting graded bolts. I can always order them from places like boltdepot, but I would like to source locally.
– RustyShackleford
8 hours ago
Do you need galvanized? Big box stores do sell grade 5 and grade 8 bolts. Auto parts stores are another source.
– JPhi1618
7 hours ago
I don't need galvanized; that's just where they sent me when I said I needed Grade 5.
– RustyShackleford
7 hours ago
My assumption was that galvanized bolts are not graded and are low grade. Just go to an Ace or Lowes or Home Depot, but I'd be interested if anyone knows better about galvanized.
– JPhi1618
7 hours ago
Those places MIGHT have grade 5 hex bolts, but not carriage.
– RustyShackleford
7 hours ago