Bolt Extenders – General specification (coarse thread)

Bolt Extenders – General specification (coarse thread)

Internal thread diameter*
Pitch of thread
External diameter, shank diameter
Nominal length
m (ref.)
Minimum tensile strength**
M303.5M42100, 120466
M333.5M45100, 120576
M364M48100, 120 or 150678
Dimensions in millimetres

*) Internal thread class 6H (to suite bolts with thread class 6g) for use with bolts, studs or square square holding down bolts bolts (BS 7419). For hot-dip galvanised finish, the internal thread is tapped oversize 6AZ (to suite standard galvanised bolts with thread class 6g). Coarse thread.

**) Minimum tensile strength based on a minimum of 45% (of the bolt extender length) of threads screwed into an internal thread on both ends of the bolt extender.

Head dimensions depend on which blank standard the extender is manufactured.
It can be either ISO 4017 or DIN 933.

Bolt extenders are manufactured from Grade 8.8 Carbon Steel bolt blanks as standard.
Other grades, types of steel and lengths may be considered.

We can make bolt extenders to your needs. Above is a general specification for a typical extender. If you need an extender to make to the specific requirements contact our sales team and together with our engineers, we can make it happen.

Bolt extender from blank

bolt extenders

Looking for Hexagon Stud Connector, Coupling Nut based on DIN 6334, follow this link.

↫ Go back