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Rapid Tension System
Technical Specification
The DISC-LOCK Rapid Tension
structural bolts are produced with full factory mill
certifications and lot identification marked on the head of
each bolt.
Rapid Tension bolts meet all
AISC requirements and specifications of A.S.T.M. A325M.
A490M structural bolts and DISC-LOCK Nuts meet all physical
requirements of A.S.T.M. A194-2H.
The DISC-LOCK Rapid Tension
system is approved by the U.S. Department of Transportation
Federal Rail Administration.
Bolt Tension Requirements
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BOLT SIZE |
MINIMUM BOLT TENSION |
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DIAMETER |
A325M |
A490M |
|
M16 |
95,500N |
119,800N |
|
M20 |
149,200N |
187,400N |
|
M22 |
184,400N |
231,500N |
|
M24 |
215,300N |
269,700N |
Each container of DISC-LOCK
Rapid Tension bolts and nuts are labeled with lot number
identification which corresponds to the lot number marked on
each bolt in that container.
The lot number allows for
traceability of the bolt from raw material through
manufacturing.
The accompanying
certification documents are traced to the actual bolts by
the lot number identification system.
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