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2. Direct tension indicator - Wikipedia

   en.wikipedia.org/wiki/Direct_tension_indicator

   The direct tension indicators shall conform to required chemical composition, compression load, and dimensional values." [5] Like other fastener components, DTIs are covered by the Fastener Quality Act of 1999 in section 3: Definitions (6), [6] where a DTI is described as "a load-indicating washer, that is through-hardened".

3. ISO 898 - Wikipedia

   en.wikipedia.org/wiki/ISO_898

   1. Bolts, screws and studs with specified property classes – Coarse thread and fine pitch thread [2] 2. Nuts with specified proof load values – Coarse thread [3] 3. Flat washers with specified property classes [4] 5. Set screws and similar threaded fasteners not under tensile stresses [5] [6] 6.

4. Washer (hardware) - Wikipedia

   en.wikipedia.org/wiki/Washer_(hardware)

   A plain washer and a spring washer are placed on a bolt between the nut (on the threaded end) and the bolt head. The American National Standards Institute (ANSI) provides standards for general use flat washers. Type A is a series of steel washers at broad tolerances, where precision is not critical.

5. Slip-critical joint - Wikipedia

   en.wikipedia.org/wiki/Slip-critical_joint

   These bolts, usually tension control bolts or compressible washer tension indicating type bolts, are tensioned to a minimum required amount to generate large enough friction forces between the faying surfaces such that the shear (or tension) load is transferred by the structural members and not by the bolts (in shear) and the connection plates ...

6. List of ISO standards 1–1999 - Wikipedia

   en.wikipedia.org/wiki/List_of_ISO_standards_1–1999

   ISO 885:2000 General purpose bolts and screws — Metric series — Radii under the head; ISO 886:1973 Aluminium and aluminium alloys — Determination of manganese — Photometric method (Manganese content between 0,005 and 1,5 %) ISO 887:2000 Plain washers for metric bolts, screws and nuts for general purposes — General plan

7. ASTM A490 - Wikipedia

   en.wikipedia.org/wiki/ASTM_A490

   ASTM A490 and ASTM A490M are ASTM International standards for heavy hex structural bolts made from alloy steel.The imperial standard is officially titled Standard Specification for Structural Bolts, Alloy Steel, Heat Treated, 150 ksi Minimum Tensile Strength, while the metric standard (M) is titled Standard Specification for High-Strength Steel Bolts, Classes 10.9 and 10.9.3, for Structural ...