FASTENERS HOLDERS
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Application Specific Accessories
1000HDX with Fastener Tensile and Double-Shear Compression Fixtures
Basic Fastener Tensile Configuration includes Series B Bolt Holders
Fastener accessories allow for the performance of static tensile testing of external and internal threaded fasteners. Instron® fastener holders in combination with washers, short bolt adapters and nut proof loading assemblies carry out tests to include axial and wedge proof loading and tensile as well as nut proof load tests in accordance with ASTM F606. Fastener holder sets are standardly available with capacities ranging from 100 kN to 1500 kN (22,500 lbf to 337,500 lbf). Each fastener holder has a key slot opening to facilitate quick specimen insertion. A circular recess in the holder ensures that the specimen is installed properly and aligned axially while also preventing it from shifting in the holder. These features work together to improve throughput and repeatability without compromising safety. The fastener holders are typically attached to the load frame using spherically aligned tension rods, couplings and/or attachment kits that mate with the standard Instron attachment adapting interface noted in the product description.
Principle of Operation The most common inserts used with fastener holders are washers. Washers provide the interface between the fastener being tested and the holder. For a typical test, the operator fits an unthreaded washer under the head of a screw or bolt and a threaded washer onto the threaded section of the fastener (when testing studs, two threaded washers are used, one on each threaded end portion). After fitting the specimen with both washers, the operator places the fastener into the holder, applies a pre-load to ensure correct seating and adjust the alignment, and begins the test. Fasteners of a shorter length may require a short bolt adapter rather than a threaded washer.
Application Range • Types of loading: Proof tests, axial and wedge tensile tests • Specimen materials: Metal alloys • Specimen types: Bolts, nuts, studs
Safety Advice Review safety note on page 234
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