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Mild Steel (MS) Flat Washers | Traditional 1 Line to 6 Line (Sut) Sizes | Stamped Low-Carbon Steel Load-Spreading Units for General Fabrication
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MS Washers measured in "Lines" (or Suts) are the critical load-distribution components used in traditional Nepalese fabrication and construction. Manufactured from stamped mild steel sheets, these flat circular units are designed to be placed under the head of a bolt or a nut. The structural logic of the "Line" system follows 1/8th-inch increments (1 Sut = 1/8"), covering the range from 1/8" (1 Line) to 3/4" (6 Line). By increasing the bearing surface area, these washers prevent the fastener from pulling through or "sinking" into softer materials like timber or thin-gauge steel sheets. Furthermore, they provide a smooth surface for tightening, protecting the parent material from the rotational friction (galling) caused by the nut or bolt head during the torquing process.
|
Size in Lines (Suts) |
Internal Diameter (ID) |
Outer Diameter (OD) Logic |
|
1 Line |
1/8" |
Optimized for small crafts |
|
2 Lines |
1/4" |
Standard for light furniture |
|
3 Lines |
3/8" |
Common for window grill sets |
|
4 Lines |
1/2" |
Essential for door frame bolts |
|
5 Lines |
5/8" |
Heavy agricultural mountings |
|
6 Lines |
3/4" |
Medium industrial frameworks |
- Sut-Calibrated Internal Diameter: Precision-stamped to match the shank of 1 Line to 6 Line bolts, ensuring a snug fit with minimal play for maximum load distribution.
- Effective Surface Protection: Designed to act as a buffer between the fastener and the substrate, preventing the nut or bolt from deforming the surface of steel angles or timber.
- Enhanced Torque Stability: Provides a uniform, flat surface that allows for consistent torque application, ensuring that the tension in the bolt is distributed evenly across the joint.
- Mild Steel Ductility Logic: Manufactured from high-quality MS sheet, allowing the washer to conform slightly to uneven surfaces to create a more secure mechanical seal.
- Versatile Corrosion Finishes: Available in standard Black Oxide for internal machinery or Zinc-Plated (Galvanized) for gates, grills, and outdoor structural frames.
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