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Metal machine key with square ends, silver finish

MIDWEST FASTENER CORP

MIDWEST FASTENER CORP 34281 lockout kit

SKU CH-6HRF-DRXKP

A square-end machine key measuring three inches long by five-sixteenths inch square secures rotating components on shafts

  • Square-end machine key fits standard 5/16 in keyways
  • Three-inch length provides secure engagement in shafts
  • New condition ensures reliable performance from first use
  • MIDWEST FASTENER manufacturing delivers consistent dimensional accuracy
  • Model 34281 simplifies reordering and inventory tracking

Square-end machine key

The MIDWEST FASTENER 34281 is a square-end machine key measuring 3 in long by 5/16 in square. It is made for mechanics and maintenance teams who need to lock rotating components onto shafts in automotive and industrial equipment.

5/16 in square dimension

The 5/16 in square cross-section is the single specification that decides fit. The keyway in the hub and shaft must match this exact size, otherwise the key will not seat correctly and torque cannot be transmitted.

Solid steel construction

The solid steel body generates no heat, produces no noise and draws no power during normal use. It is a passive mechanical component that operates without thermal or electrical load.

How it compares

Measured against everything we stock in Car Lockout Tools & Lock Actuators, at today’s prices. Recalculated every night.

Price $8.99
Typical for this category: the median of 33 items is $8.99.

Specifications

Product
Brand nameMIDWEST FASTENER

Questions about this item

How does the 5/16 in square cross-section translate when the key is seated in a machine keyway?

The 5/16 in square end fills a matching keyway slot, transferring torque between shaft and hub without a setscrew.

What does the 3 in overall length limit in terms of hub engagement?

A 3 in length allows the key to span hubs up to that width, but the exact engagement depends on the keyway depth cut in each component.

What clearance is needed to install or remove this square-end machine key?

You need open access to the keyway ends so the 3 in key can slide straight in or out without obstruction from adjacent collars or bearings.

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