Embed Size (px)
Citation preview
website: www.unbrako.com / e-mail: [email protected]
The use of high strength structural fasteners in friction grip joints has been one of the most important
developments in structural engineering over the last about four decades. It provides a simple method of
transmitting loads through a structural joint by the friction on the contact face developed through the high
clamping force from correctly tightened high strength bolts and nuts.
ASTM A325 & ASTM A490
RELIABILTYOnce tightened, the bolts will remain
tight and maintain the permanent
strength of the joint. Absence of heavy
stress concentration due to absence of
bearing between bolts and plates. As
bolts are in tension, it does not permit
loosening, thus making it most ideal
where vibrations are involved.
Whether in the workshop or at site, H.S.S.
Bolts enable joints to be made easily.
Welding of site splices can be eliminated,
avoiding the difficulties of welding in
adverse weather conditions. Absence of
pneumatic hammers used in riveted
joints reduce noise level considerably.
CONVENIENCEMinimum skill is required for tightening
and the operators need to follow only
few simple rules.
SIMPLICITY
Fewer high strength bolts are required
than M.S. bolts and rivets. Drilling of
close tolerance holes is not required.
Overall weight of the structure will be
very light.
ECONOMY
Tensil Strength (min)
Yield Strength (min)
Marking
150,000 - 173,000 psi
120,000 psi
Material
Hardness
Thread Class
Unbrako Alloy Steel
HRC 33 - 39
Bolts & Screws - 2A
Nuts - 2B
Tensil Strength (min)
Yield Strength (min)
Marking
1/2" - 1" = 120,000 psi
1.1/8" - 1.1/2" = 105,000 psi
1/2" - 1" = 92,000 psi
1.1/8" - 1.1/2" = 81,000 psi
Material
Hardness
Thread Class
Unbrako Alloy Steel
1/2"-1" = HRC 25-34
1.1/8" - 1.1/2" = HRC 23 - 30
Bolts & Screws - 2A
Nuts - 2B
UNBRAKO Grade ASTM A325 / A194 / A563 UNBRAKO Grade ASTM A490 / A194 / A563
High Strength Structural Fasteners THE WORLD LEADER
High Strength Structural Fasteners
THE GRADE 8 ADVANTAGE...
UNBRAKO (EUROPE)Deepak Fasteners (Shannon) Ltd.
Bays 25-30 Shannon Industrial
Estate, County Clare, Ireland
Ph.: +353-61-716-500
Fax: +353-61-716-584
UNBRAKO (U.K.)Deepak Fasteners (U.K.) Ltd.
12-14 Tower Street, New Town
Birmingham - B19 3rr, U.K.
Ph.: +44-121-333-4610
Fax: +44-121-333-4525
UNBRAKO (AUSTRALIA)Deepak Fasteners (Australia) Ltd.
67-69 Licola Crescent Dandenong
South Victoria 3175, Australia
Ph.: +61-3-98940026
Fax: +61-3-98940038
UNBRAKO (INDIA)Deepak Fasteners (India) Ltd.
4th Floor, First Mall, The Mall
Ludhiana- 141001 (pb.) India
Ph.: +91-161-3911111
Fax: +91-161-2774400
UNBRAKO LLC (USA)12833 South Spring Street
Los Angeles, California
USA - 90061
Ph.: +1-310-817-2400
Fax: +1-310-817-2399
With Grade 8 giving you 30% more strength over Grade 5, it is not hard to understand
why more and more end users are asking for Grade 8 product....
Material
Hardness
Thread Class
: Unbrako Alloy Steel
: HRC 33 - 38
: Bolts & Screws - 2A
Nuts - 2B
Tensil Strength (Min)
Yield Strength (Min)
Marking
: 150,000 psi
: 130,000 psi
:
Bolt Nut
Unbrako Grade 8 High Tensile Bolts & Nuts
Description
Dimensional
Nut
ASME/ANSI-B18.2.2
Bolt
ASME/ANSI-B18.2.1
Chemical & Mechanical
SAE J-995SAE J-429
Applicable Specifications
Grade 2 Grade 5 Grade 8
()
PS
I
10
00
7460 60
120
105
150Tensile StrengthYield Strength
1/4”-3/4”6in<
1/4”-3/4”6in>
3636
7/8”-1 1/2”
57
1/4”- 1”1 1/8”
-1 1/2” 1/4”
-1 1/2”
92
81
130
website: www.unbrako.com / e-mail: [email protected]
THE WORLD LEADER
