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3.5 Fittings and allied materials

Screws (countersunk, round head, raised head, coach screws, chipboard screws with nibs that self-countersink, 2015 MC7; length measured as the part embedded in the material for round heads, 2018 MC8; pitch = distance between threads, 2023 MC6), nails (bullet head, panel pins (use a Warrington hammer), clouts), nuts and bolts, knock-down fittings (cam lock, cross dowel, connector bolt, threaded inserts), hinges (butt, piano, concealed/European cup hinges, often soft-close), handles and knobs (snap-off screws let the length be adjusted, 2024 MC8), staples/staple guns (attaching thin sheet backs, 2022 MC4), drawer runners (timber runners: cheap, custom, replaceable; metal ball-bearing/full-extension runners: heavy loads, smooth, full access, easy with templates, 2018 Q15, 2025 MC8), table clips/buttons (attach tops while allowing movement), latches, catches, shelf hangers/supports. Allied materials: glass, metal, polymers, upholstery (foam, webbing, fabric), composites; mainly add function and aesthetics (2024 MC5).

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