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Black oxide steel rigid coupling, 7/8 inch diameter

Climax Metal Products

Climax Metal Products ISCC-025-025 Rigid Steel Conduit Coupling

SKU CH-FA5H-2JJRF

Rigid steel shaft coupling with 1/4 inch bore and 47 in-lb torque rating

  • Steel construction resists wear in conduit runs
  • One-piece clamp simplifies rigid conduit alignment
  • 1/4 in bore fits standard shaft diameters
  • 47 in-lb torque rating secures connections
  • 4000 RPM limit suits low-speed installations

Rigid Steel Conduit Coupling

The Climax Metal Products ISCC-025-025 is a rigid shaft coupling made from steel with a black oxide finish. It uses a single-piece clamp design without a keyway to join two 1/4 inch shafts. This component suits maintenance technicians and machinery builders who need a solid, zero-backlash connection for light-duty power transmission.

Torque and Speed Capacity

The coupling transmits up to 47 in-lb of torque and is rated for a maximum of 4,000 RPM. It comfortably handles low-torque positioning tasks and slow-speed drives where precise alignment is maintained. The design runs out of headroom in high-vibration environments or applications that exceed the stated torque limit, requiring a flexible alternative in those cases.

Clamp Interface Limits

The clamp fastens with #4-40 screws and provides a clearance diameter of .875 in. This screw size limits the maximum clamping force achievable, so the joint relies on accurate shaft sizing and clean surfaces for grip. The interface cannot accommodate keyed shafts or diameters other than 1/4 in, ruling out larger or differently featured shafting.

How it compares

Measured against everything we stock in Electrical Conduit & Fittings, at today’s prices. Recalculated every night.

Price $16.99
Cheaper than about 63% of the 1,290 comparable items (median $28.99).

Specifications

Product
Brand nameCLIMAX METAL PRODUCTS

Questions about this item

Will the 1/4 in bore fit the 1/4 in shafts I already use?

Yes, the coupling is machined for a 1/4 in bore diameter and a 0.875 in outside diameter, matching standard 1/4 in shafting.

How can I confirm the coupling is seated and aligned after installation?

Tighten the #4-40 clamp screw to the rated 47 in-lb torque; the single-piece clamp design then holds the shafts concentric with no keyway required.

Does the package include the clamp screw or must I source #4-40 hardware separately?

The coupling is supplied as a complete one-piece clamp, so the #4-40 screw is already integrated and no extra hardware is needed.

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