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Red steel padlock with laminated body and red bumper, open shackle, standard keyway

Master Lock

Master Lock 4 Pin Tumbler Padlock Red Bumper

SKU CH-3W1H-RTG7D

A 4-pin tumbler padlock with a red bumper and steel shackle, keyed differently for individual access control

  • Product typeSafety
  • Pry-resistant steel body deters forced entry
  • Laminated steel construction adds physical strength
  • 5/16 in hardened steel shackle resists cutting
  • Keyed-different cylinder prevents unauthorised duplicates
  • Red bumper coating protects surfaces from scratches

Solid Steel Padlock for Safety Lockout

The Master Lock 4-pin tumbler padlock uses a laminated steel body and a hardened steel shackle to resist prying and cutting. Its red thermoplastic bumper protects finished surfaces and makes the lock easy to spot on a crowded hasp. Each unit is keyed different so one key opens only its own lock.

5/16-Inch Shackle Diameter Fits Standard Hasp Holes

The shackle measures 5/16 in thick with a 5/8 in horizontal and 3/4 in vertical clearance, matching the most common industrial hasp and chain-link dimensions. If your attachment point is smaller or larger, the lock will not engage properly.

Suits Maintenance Teams Needing Individual Key

Workers who must isolate energy sources one lock per person will value the keyed-different approach. Crews that prefer a single master key for all padlocks or who require a shrouded shackle for extra cut resistance should look at other models.

How it compares

Measured against everything we stock in Door Lock Sets & Deadbolts, at today’s prices. Recalculated every night.

Price $8.99
Cheaper than about 91% of the 2,145 comparable items (median $55.99).

Specifications

Product
Brand nameMaster Lock
Product typeSafety

Questions about this item

How does the 4-pin tumbler mechanism affect everyday security?

The 4-pin tumbler cylinder provides standard keyed-different security, meaning each lock opens only with its own key and resists casual picking attempts.

What does the 5/16-inch shackle diameter limit when locking equipment?

The 5/16-inch steel shackle fits hasps, chains or lockout points with holes of at least that diameter, capping the maximum hardware thickness you can secure.

Will the 1-1/4-inch tall laminated steel body fit my existing lockout station?

The body measures 1-1/4 inches high by 1-9/16 inches wide and 3/4 inch thick, so it fits standard lockout boards and group lock boxes designed for that footprint.

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