G5 & G8....size

[boland magyar]

hi all

pardon my ignorance but what are the sizes of g5 & g8 bolts in metric.

thanks boland

[Yersinia]

60x150 mm i thinX . thats a 1/4 6"

Edited March 31, 2007 by Yersinia

[dimmers]

These bolts can be purchased in lots of different sizes, but 1/4" and 5/16" are favoured for bending.

Conversions,

1/4 inch = 0.25 inches = 6.35 millimeters

5/16 inch = 0.3125 inches = 7.9375 millimeters

1 inch = 25.4 millimeters

1 millimeter = 0.0393700787 inch

hope this helps

Edited March 31, 2007 by youdimmers

[Yersinia]

ehm 6x150 mm was what i meant :p

[boland magyar]

thanks youdimmers

so would the 1/4 be the g5 and the 5/16 be the g8.

and how long are they

thanks boland

[gagleard]

The grades have to do with how hard they are, not length. There are G5's and G8's in 1/4 as well as 5/16.

Hope this helps

[dimmers]

Some techy info on bolts,

How do metric strength grades correspond to the inch strength grades?

Some details on conversion guidance between metric and inch based strength grades is given in section 3.4 of the standard SAE J1199 (Mechanical and Material Requirements for Metric Externally Threaded Steel Fasteners).

Metric fastener strength is denoted by a property class which is equivalent to a strength grade. Briefly:

Class 4.6 is approximately equivalent to SAE J429 Grade 1 and ASTM A307 Grade A

Class 5.8 is approximately equivalent to SAE J429 Grade 2

Class 8.8 is approximately equivalent to SAE J429 Grade 5 and ASTM A449

Class 9.8 is approximately 9% stronger than equivalent to SAE J429 Grade 5 and ASTM A449

Class 10.9 is approximately equivalent to SAE J429 Grade 8 and ASTM A354 Grade BD

For information there is no direct inch equivalent to the metric 12.9 property class.

http://www.boltscience.com - if you're really that interested

[boland magyar]

youdimmer

you have blown my mind with that information

but the reason i asked was becouse today i went in my local b & q asked the helpfull staff (lol)

for a g5/g8 bolt and they had that far away look in there eyes then said " sorry sir but ive never heard of them"

boland

[dimmers]

What you need to ask for in the UK is a class 8.8 bolt (which is the equivalent of a grade 5). Bit tricky to get hold of in your local home store over here, so your best bet is to look on the internet (or order some stock from the link at the top of the page - Fat bastard barbell).

Good luck in your training!

[boland magyar]

thanks youdimmers

boland