Fastener testing accessories allow for the performance of proof tests, axial and wedge tensile tests, and cone stripping tests on most standard bolts, screws, studs, and nuts. They are compatible with most universal and tensile testing machines. Available accessories consist of: fastener holders, washers, short bolt adapters, nut proof loading assemblies, and holder reducing assemblies.
Fastener holders are the main component for performing fastener testing. They are used in conjunction with any of the other fastener accessories. Five different fastener holder sets are available, with capacities ranging from 150 to 1500 kN (33,750 to 337,500 lbs).
Fastener holders are threaded on the adapting end to mount easily to either spherically seated tension rods or other adapters. When adapters are ordered (catalogue number W-5118), either separate adapters will be supplied as needed or the fastener holders will be threaded to meet the mounting dimensions specified. Fastener holders can also be ordered with standard Instron attachment styles that are either a pin & clevis or a metric, male threaded interface.
Each fastener holder has a key slot that allows the operator to quickly and correctly load the specimen. A recessed circular area in the bottom of each fastener holder ensures that the washer will fit snugly (sheet metal alignment device is used on Series E holders). This reduces loading time and occurrences of slippage, because a secure, centered seating is ensured for each test.