Plain & Lock Washers (IS 5369)
Equivalent Standard: ISO 7089
Plain Washers are also known as Flat washers and their work is to distribute the fastener’s load while reducing heat and friction during the tightening process. They are typically designed to spread the loan and protect the respective surface from damage. They can also be used as spacers, as is common in industrial and domestic applications. Flat washers are also called on to provide electrical insulation. Plain washers do not have a locking function, rather they are used to protect the mating surface from damage.
- IS 5369
- Quality: 100 HV
- Coating: Self, Black, Bright Zinc, Hot Dip Galvanized
- Thread: METRIC
IS 5369
IS 5369 is a standard that plays a crucial role in the world of fasteners. It specifically pertains to hexagon head bolts, screws, and nuts made from carbon steel or alloy steel. This standard ensures that these fasteners meet specific requirements in terms of their dimensions, materials, and performance. It covers various aspects such as thread sizes, length tolerances, thread form, and mechanical properties. Compliance with IS 5369 is essential to ensure the safe and efficient use of fasteners in various industries, including construction, automotive, and manufacturing. By adhering to this standard, manufacturers can guarantee the reliability and durability of the fasteners, reducing the risk of failures, accidents, and costly repairs. Additionally, Indian Standard Plain Washers IS 5369.
Technical Specification for IS 5369 Plain & Lock Washers
| Reference Dimension | Permissible Deviation (Tolerance Zone) | Permissible Deviation on Concentricity x+ | ||||
|---|---|---|---|---|---|---|
Over | Up to | b1 | d1* | d2 | Lock Width + | |
_ 3 6 | 3 6 10 | _ h14 h14 | H13 H13 H13 | h14 h14 h14 | h13 h13 h13 | 2IT12 2IT12 2IT12 2IT12 |
10 18 30 | 18 30 50 | h14 h14 h14 | H14 H14 H14 | h14 h14 h14 | h13 h13 h13 | 2IT12 2IT12 2IT12 2IT12 |
50 80 12 | 80 120 180 | _ _ _ | H14 H14 H14 | h15 h15 h15 | _ _ _ | 2IT13 2IT13 2IT13 2IT13 |
180 | 250 | _ | _ | h15 | _ | 2IT13 |