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Plug/Slot Spec Table
Plug/Slot KS Specifications — 2 sizes
KS B ISO 2553
Plug and slot weld symbols for welding overlapping members through holes or elongated slots.
Practical Notes
- Welds overlapping members through holes. Used where only single-side access is possible.
KSPlug/Slot
2 sizes| Name | Type | Symbol | Description | Dimension | Note |
|---|---|---|---|---|---|
| Plug Weld | Plug/Slot | □ | BoreFill Weld | Bore | Lap Joint |
| Slot Weld | Plug/Slot | □ | SlotFill Weld | Slot Width×Length | Lap Joint |
Key Features
- Circular (plug) or elongated (slot) holes drilled in overlapping plates and filled with weld
- Hole diameter, length, pitch, and fill depth (partial/full) specified in symbol
- Used as alternative to spot welding in hard-to-access lap joints
Key Applications
Vehicle body panel overlaps, tank stiffening ribs, ship double-bottom joints, bridge deck-girder, heavy equipment covers
FAQ
Difference between plug and slot welds?
Plug welds through round holes; slot welds through elongated holes. Use slot for long joints; plug for point joints.