InstructionsSelect a glossary term in the selection box in the left margin to view the definition as it pertains to Avdel® fastening solutions and installation tooling.
ANVIL
The part of an installation tool nose assembly used to swage the collar of
a lockbolt fastener. Commonly known as a swaging anvil.
BEARING SURFACE
The head or tail of the fastener which is in contact with the outer surface
of the joint material.  BLIND HOLE
A hole which can only be accessed from one end.  BLIND FASTENER
A fastener that can be installed with access to only one side of the work
piece.
BLIND SIDE
The side of the joint which cannot be accessed. E.g. the inside surface of
a tubular or box section.  BODY
The portion of a breakstem fastener that expands into the parent material.
BODY LENGTH
A dimensioned length from the fastener head to the tail.  BREAKER GROOVE
The weakened groove in the stem or pin of a fastener allowing it to break
at a pre-determined load.  BREAKSTEM FASTENER
A fastener which is installed by gripping and pulling the end of the
mandrel/stem. As installation is completed, the end of the stem fractures
at the breaker groove and is discarded, leaving the head of the stem in the
fastener body. 
Interactive DemoBROACH
(with reference to Avdel® Speed Fastening System)
The action of pulling the mandrel though the speed fastener in order to place
it. 
Interactive DemoBROACH LOAD
(with reference to Avdel® Speed Fastening System)
The force required to pull the mandrel through the speed fastener in order
to place it.
BSW - WHITWORTH THREAD
An imperial thread form standard, no longer in mainstream use. It is covered
by British Standard BS 84.
BULBING
The physical action of the fastener body swelling (bulbing radially) against
the rear face of the joint when placed. Generally found in breakstem fasteners,
speed fasteners and threaded inserts. 
Interactive DemoCLAMP LOAD
The compressive load induced in the joint by the installed fastener. The
residual clamp load (or joint pre-tension) is the compressive load remaining
in the joint after the fastener is installed. Higher clamp loads are experienced
during fastener installation (pulling force).  CLENCH
The ability of a fastener to draw together and hold together initially separated
joint material components, during the installation process. i.e. "Gap closing"
ability.  COLLAR CROPPER/SPLITTER
An installation tool attachment that removes collars from lockbolt fasteners.  COMPLETE HOLE FILL
Fasteners with this capability expand to fill irregular, slotted, oversize
or misaligned holes.
DRIVE SCREW
The male threaded part in the nose of a threaded insert installation tool,
which engages the female thread of inserts.  FASTENER BODY
The section of the fastener, excluding the head, which is generally the
functioning/expanding part in contact with the joint.  FATIGUE STRENGTH
The ability of a fastener to resist fracture when subjected to cyclic variations
in stress.  FILLET RADIUS
The concave junction at two intersecting surfaces of a fastener.
FIT
The range of tightness within a joint, which can occur due to the combination
of fastener and parent material tolerances.
FLANGE
A disc shaped rim formed on the end of a cylindrical object, often related
to the head geometry of a fastener.  FLANGED COLLAR
A type of lockbolt collar with a flange, which provides an increased bearing
surface.  FULL COLLAR
A standard full height lockbolt collar.  GAP CLOSING
The ability of a fastener to draw together and hold together initially separated
joint material components, during the installation process. i.e. "Gap closing"
ability. GRIP
The total thickness of a closed joint.  GRIP RANGE
The difference between the minimum and maximum grip at which a fastener will
operate.
HALF COLLAR
A reduced height lockbolt collar used for minimal collar protrusion. Note:
will reduce tensile performance.  HEADFORM
The style characteristics of the fastener head. Eg. low profile, large flange,
countersunk.
HOLE FILL
The ability of a fastener to fill the clearance hole in which it is installed.
It is achieved by radial expansion of the fastener body during the installation
process.
Interactive DemoHOST MATERIAL
The application material which is being fastened together. Also referred
to as the joint or parent material.
HYDRO-PNEUMATIC
Refers to installation tools. The use of an air over oil intensification
system to generate the necessary forces required for fastener installation.
INSTALLATION TOOL
The tooling used to install a fastener. Can be hand operated or powered.  JOINT MATERIAL
The application material which is being fastened together. Also referred
to as the host or parent material.
LEAD-IN CHAMFER
The tapered end of a fastener which aids insertion into the hole.
LOCKBOLT FASTENER
A two piece fastener comprising of a pin and collar, e.g.
Avdelok®
or
Maxlok®.
Access is required to both sides of the joint and installation is achieved
by swaging the collar onto the locking
grooves of the pin. LOCKING GROOVES
A set of grooves on the pin of a lockbolt fastener, into which the collar
is swaged.  MAGAZINE-FED
(with reference to Avdel® Speed Fastening System)
Refers to a number of speed fasteners, which may be handled and loaded into
an installation tool as a single item.
MANDREL
A specially processed steel rod onto which the magazine of speed fasteners
is loaded. The stem of a breakstem fastener can also be referred to as a mandrel. MAXIMUM GRIP
The largest recommended thickness of joint material for a fastener.
MAXIMUM TORQUE
The maximum recommended torque to be applied to the bolt, which will not
cause thread distortion or failure in the threaded insert.  MECHANICALLY LOCKED STEM
The stem or mandrel is locked in the fastener shell during placement via
a mechanical system. This eliminates the risk of the stem vibrating loose
from the fastener head and the problems associated with loose stems e.g.
Monobolt®. 
Interactive DemoMINIMUM GRIP
The smallest recommended thickness of joint material for a fastener.
NOSE ASSEMBLY/NOSE EQUIPMENT
A kit of parts fitted to an installation tool. The nose assembly must be
matched to a specific fastener as it influences its installation and performance.  NOSE TIP
The interchangeable front most part of a nose assembly. The nose tip must
be matched to a specific fastener as it influences its installation and
performance.  PARENT MATERIAL
The application material which is being fastened together. Also referred
to as the joint or host material.
PASSIVATION/PASSIVATED
A process which enhances the appearance and corrosion resistance of certain
plated finishes on fasteners.
PEEL-TYPE TAIL
A rivet body which is designed to split open on the blind side of the joint
during the installation process to provide a large blind side bearing area
in soft materials E.g. T-Lok®. 
Interactive DemoPOD
(with reference to Avdel® Speed Fastening System)
A magazine of speed fasteners contained within a strip of bonded paper tape.
PULLING FORCE
The axial force the tool applies during the installation of fasteners.
PULL GROOVES
A set of grooves on a fastener stem to enhance the grip of the tool when
pulling.  PULL-OUT
The minimum force required to cause the insert to pull through and out of
the parent material.  PUSH-OUT
The minimum force required to cause the insert to push through and out of
the parent material.  REPITITION RIVETING
(with reference to Avdel® Speed Fastening System)
A speed fastening installation system where a magazine of fasteners is
loaded into an installation tool and placed into application material in rapid succession. This product facilitates very rapid installation rates. 
Interactive DemoRESIDUAL CLAMP LOAD
The compressive load induced in the joint by the installed fastener. The
residual clamp load (or joint pre-tension) is the compressive load remaining
in the joint after the fastener is installed. Higher clamp loads are experienced
during fastener installation (pulling force).
SHANK LENGTH
A dimensioned length from the fastener head to the tail. SHEAR LOAD
The load applied to a fastener along the joint interface.  SHEET TAKE-UP
The ability of a fastener to draw together and hold together initially separated
joint material components, during the installation process. i.e. "Gap closing"
ability. SPEED FASTENER
A tubular fastener which is specifically configured as part of the Avdel®
speed fastening system. The fasteners are supplied as multiples in a disposable
magazine, or loose for Avdel® continuous feed systems.
SPEED FASTENING SYSTEM
(with reference to Avdel® Speed Fastening System)
A speed fastening installation tool into which a magazine of fasteners is
loaded. This system facilitates very rapid installation rates.
Interactive DemoSTEM
The component part of a breakstem fastener that is retained within the body.
Also known as the mandrel.  STEM RETENTION
The force required to separate the stem from the body of an uninstalled breakstem
fastener.  SWAGING
The action of permanently radially deforming the collar of a lockbolt onto
the pin.
TENSILE LOAD
The load applied to a fastener along its length.  THREADED INSERT
An insert for installation into sheet material where a receptacle for a male
threaded component is required. 
Interactive DemoTHROUGH HARDENED
A process to increase uniform material hardness.
TIR APPROVED
A standard used by the Vehicle Inspectorate - Executive Agency. It is an
approved bonding scheme enabling goods vehicles to travel between countries
approved by their respective Customs Authorities. The bonding scheme ensures
that all load compartments, once sealed (using TIR approved fasteners), cannot
have anything added or taken from them without breaking seals or leaving
obvious traces of structural damage.
TORQUE-TO-TURN
Typically the torque required to rotate the installed fastener in the application
material, usually applies to threaded inserts.  ULTIMATE SHEAR STRENGTH
The failure load of the fastener in a shear situation. It may not reflect
the strength of the joint material.
ULTIMATE TENSILE STRENGTH
The failure load of the fastener in a tensile situation. It may not reflect
the strength of the joint material.
UNC - UNIFIED COARSE THREAD
An imperial thread form standard, prefered in the USA. It is covered by British
Standard BS 1580.
UNF - UNIFIED FINE THREAD
An imperial thread form standard, prefered in the USA. It is covered by British
Standard BS 1580.
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