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3/8" AA02 or AA07 Style Invert-a-Bolt™ Fasteners


3/8" comes in two body styles: AA02 & AA07. The AA02 type is common to 1/2" fasteners, allowing interchangeability. The AA07 body style has a much smaller footprint, facilitating denser patterns and reduced size of stock material. Additionally, the AA07 does not require an insertion tool. 

Suitable for plastics, aluminum, and some steels. 

3/8" Fastener

 SKU: Select Above AA02-300-021 AA07-375-021
INSERTION TOOL AA02-004-004 No insertion tool required*.
STUD 3/8"-16 3/8"-16
ENGAGEMENT .350" .210"
HEX SIZE 3/16" 3/16"
HOUSING 1"-12 LH 11/16"-16 LH
HOUSING LENGTH 1.150" 1.150"
MINOR DIAMETER .905" .616"
PLATE SIZE 1.25" 1.25"
TORQUE 28 28



*Use a 10mm hex wrench for installation.



Invert-a-Bolt fasteners are changing manufacturing processes worldwide.

This flush mounted back bolt system allows manufacturers to eliminate clamps and bolts when machining parts by securing stock and work-holding materials from underneath. This “flat plate” system contributes to maximum flexibility of the fixturing, providing improved work-holding solutions which ultimately leads to more parts produced, higher safety and less waste. Back bolts eliminate the need for costly clamps and vises and dramatically reduced setup times, which allows you to machine more parts faster with less risk of damage. Back-bolt systems can dramatically affect your pocket book too. More parts means more efficiency, better cycle time and more sales.

Why IVB Fasteners Are Right For You

Replace your clamps and screws with Invert-A-Bolt™ (IVB) Fasteners. These unique, flush-mounted back bolt fasteners eliminate obstructions to machining, reduce vibration in your setup, and lower your cost by cutting setup times, reducing waste and providing faster change outs.

Superior holding ability

Reduces stock size

Reduces the number of setups

Eliminates Bridge Fixtures

Reduces programming headaches

Works well with most modular components

IVB Fasteners make your workholding projects easier.

Stop wasting time looking for the "right" bolt again. Stop wasting time by grinding a bolt to size again. Stop interrupting the machining process to change clamps. Stop introducing warp creating stress into your parts due to excessive clamping.

Run more parts

Reduce down-stream costs

Eliminate wasted time used to change clamps

Reduce obstructions in multi-axis machining

IVB Fasteners are simple to use and install, embedded in the fixture for easy access.

These back bolts are always available in the fixture, with standardized stick-out. Simply screw the larger diameter (the housing) into the fixture plate and bring the inner diameter (the stud) up into your stock material for a superior work-holding solution.

Raise and lower in seconds with a pneumatic driver

Flush mount means that they are there when you need them and hidden when you don't

Various stud & housing sizes

How will you use them?

IVB Fasteners are often found in high-speed horizontal manufacturing, but they fit many other appplications as well!

High speed machining


Modular tooling

Assembly jigs

Dedicated fixturing

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