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2. Threaded rod - Wikipedia

   en.wikipedia.org/wiki/Threaded_rod

   For studs that are not completely threaded, there are two types of studs: full-bodied studs, and undercut studs. Full-bodied studs have a shank equal to the major diameter of the thread. Undercut studs have a shank equal to the pitch diameter of the screw thread. Undercut studs are designed to better distribute axial stresses. In a full-bodied ...

3. Turnbuckle - Wikipedia

   en.wikipedia.org/wiki/Turnbuckle

   A turnbuckle, stretching screw or bottlescrew is a device for adjusting the tension or length of ropes, cables, tie rods, and other tensioning systems. It normally consists of two threaded eye bolts , one screwed into each end of a small metal frame, one with a conventional right-hand thread and the other with a left-hand thread.

4. Hardness comparison - Wikipedia

   en.wikipedia.org/wiki/Hardness_comparison

   ISO 18265: "Metallic materials — Conversion of hardness values" (2013) ASTM E140-12B(2019)e1: "Standard Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness" (2019)

5. SAE steel grades - Wikipedia

   en.wikipedia.org/wiki/SAE_steel_grades

   Type 304—the most common grade; the classic 18/8 (18% chromium, 8% nickel) stainless steel. Outside of the US it is commonly known as "A2 stainless steel", in accordance with ISO 3506 (not to be confused with A2 tool steel). [6] The Japanese equivalent grade of this material is SUS304.

6. Stud welding - Wikipedia

   en.wikipedia.org/wiki/Stud_welding

   Capacitor discharge weld studs range from 14 gauge to 3/8" diameter. They come in many different lengths, ranging from 1/4" to 5" and larger. They are usually manufactured from mild or stainless steel, brass, aluminium, and aluminium alloy. The tip on the weld end of the stud serves a twofold purpose:

7. Unified Thread Standard - Wikipedia

   en.wikipedia.org/wiki/Unified_Thread_Standard

   To calculate the major diameter of "aught" size screws count the number of extra zeroes and multiply this number by 0.013 in and subtract from 0.060 in. For example, the major diameter of a #0000 screw is 0.060 in − (3 × 0.013 in) = 0.060 in − 0.039 in = 0.021 in.