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Clamps, Springs, O-Rings and Machine Hardware

Toggle and hold-down clamps, drill chucks, O-rings and cord stock, springs, cables and general machine hardware. 383 products from $2.99 to $1,200.99. Grote, Maxxima, Marine Sport Lighting and more.

383 products from $2.99

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Clamps and chucks: capacity ratings and mounting

Clamps, chucks, springs and seals are mixed here, so start from the part type. Hold-down and toggle clamps are rated by holding capacity, for example 700 lb, so choose one with margin over the force your operation applies. Handle style (vertical, horizontal or push-pull), base footprint and arm travel decide whether it fits your fixture. Drill chucks must match the machine: the capacity, such as 1/2 inch, is the largest straight shank they hold, and the mount, whether threaded, tapered or quick-change, must match the spindle or adapter. Springs are specified by wire diameter, free length and rate.

O-rings, cord stock and material choice

O-rings are sized by inside diameter and cross-section, and the material must suit the fluid and the temperature. Nitrile handles oils and fuels at ordinary temperatures, silicone copes with wide temperature swings but not oil contact, and FKM (fluoroelastomer) resists heat and many chemicals. Cord stock lets you cut a custom ring or gasket. Hardware in steel is the default, stainless resists corrosion, and carbide tooling holds an edge on hard materials but chips under shock. Check the pack count, which ranges from single pieces to bulk.

Questions about Clamps, Springs, O-Rings and Machine Hardware

How do I choose an O-ring material?
Match it to the fluid and temperature. Nitrile suits oils and fuels at ordinary temperatures, silicone suits wide temperature swings with air or water, and FKM resists heat and many chemicals. Check the ring's inside diameter and cross-section, since both must match the groove.
What does a toggle clamp's holding capacity mean?
It is the maximum force the clamp can resist in the closed position under the stated conditions. Choose a rating well above the force of your operation, and mount the clamp so the load acts the way the maker intended.
Does chuck capacity mean the largest drill I can use?
It means the largest straight shank the chuck can hold, such as 1/2 inch, not the largest hole you can drill. Check the mounting type too, because a chuck only fits a spindle or adapter with the matching thread or taper.