Metric Heavy Hex Head Structural Bolt, ASTM A325 A490 Heavy Hex Bolts, Hot dip galvanized 8.8 heavy hex bolt for electric equipment Finish: ZINC, Plain Material: Steel, carbon steel Standard: DIN FINISHED: Black,ZINC HDG,Dacroment. PLAIN SIZE: M45,M4,M12 M72,M56 M3.5 LENGTH: 60MM-300MM GRADE: 4.8,6.8 8.8 10.9 TYPE: hexagon bolt customized Certificate: ISO9001 Metric Heavy Hex Head […]
Titanium Plating Bolt Nut, High strength hex head bolt nut din933 din931 din934 Titanium plating bolts and nuts m10, Grade8.8 hex head bolt and nut, Titanium coated steel bolt & nut China supplier
Titanium Plating Bolt Nut Features
Material Carbon Steel
Surface Treatment Titanium plating
Standard DIN 933 DIN931 DIN934
Thread Coarse, Fine
Used Building Industry Machinery
1. Certification: ISO, ROHS, SGS
2.Material:Carbon Steel 45, alloy steel ,General Carbon Steel,SUS304,316
3.Available Standard: DIN, ANSI, ASTM, JIS, BS,ISO
4. Finishing: Yellow, blue and white zinc plated, Galvanized, HDG, Chromate, Dacromet
5. Available material: SUS316, SUS304, Carbon Steel
6. MOQ: 1000pcs
Bolts use a wide variety of head designs, as do screws. These are designed to engage with the tool used to tighten them. Some bolt heads instead lock the bolt in place, so that it does not move and a tool is only needed for the nut end.
Common bolt heads include hex, slotted hex washer, and socket cap.
The first bolts had square heads, formed by forging. These are still found, although much more common today is the hexagonal head. These are held and turned by a spanner or wrench, of which there are many forms. Most are held from the side, some from in-line with the bolt. Other bolts have T-heads and slotted heads. 10.9 Hex Socket Bolt
Many screws use a screwdriver head fitting, rather than an external wrench. Screwdrivers are applied in-line with the fastener, rather than from the side. These are smaller than most wrench heads and cannot usually apply the same amount of torque. It is sometimes assumed that screwdriver heads imply a screw and wrenches imply a bolt, although this is incorrect. Coach screws are large square-headed screws with a tapered wood screw thread, used for attaching ironwork to timber.
Head designs that overlap both are the Allen or Torx heads; hexagonal or splined sockets. These modern designs span a large range of sizes and can carry a considerable torque.