311KA COVERED LAMINATED PADLOCK - 1st-in-Padlocks

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311 COVERED LAMINATED PADLOCK

Name: 311 COVERED LAMINATED PADLOCK
Brand: Master Lock
SKU: 311KA
Price: 15.55 USD
Availability: InStock

Master LockSKU: 311KA

Key Options: Keyed Alike - All Locks Open with Same Key

Bumpstop: None - Standard Option

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$15.55 USD

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About the Master Lock 311 Covered Laminated Padlock

The difference between a good lock and the wrong lock becomes apparent when the weather turns. The Master Lock 311 Covered Laminated Padlock puts a weather-resistant thermoplastic shell over a laminated steel body.

The shell helps keep moisture and grime away from the components that matter most. Job sites, storage units, and outdoor fences all get a lock that shows up ready.

Master Lock 311

A 1-9/16in (40mm) wide laminated steel body delivers serious resistance to physical attack. The black weather-resistant thermoplastic shell keeps moisture, dirt, and grime from compromising performance over time. The 9/32 in (7mm) diameter hardened steel shackle measures 1-1/16 in (27mm) long and resists cutting and sawing attempts.

Dual ball bearing locking tackles prying and hammering, and the 4-pin cylinder actively resists picking. A Limited Lifetime Warranty backs the whole package. Teams managing multiple access points can take advantage of the Keyed Alike option, so one key covers every lock in the set.

Browse our padlocks if your application calls for corrosion resistance in marine or coastal conditions.

311 Covered Laminated Padlock Product Highlights

Model #	311, 311KA
Body Width	1-9/16in (40mm)
Shackle Length	1-1/16in (27mm)
Shackle Width	5/8in (16mm)
Shackle Diameter	9/32in (7mm)
Key Options	Keyed Different, Keyed Alike Click HERE for additional key information.
Color Options	Black

Black weather-resistant thermoplastic shell provides outdoor protection against moisture, dirt, and grime
1-9/16in (40mm) Wide laminated steel body for superior strength
Hardened steel shackle for extra cut resistance
Dual ball bearing locking for maximum pry resistance
4-pin cylinder helps prevent picking

Best Used For: Severe Use

From a single padlock to a fully keyed-alike system across multiple locations, 1st-in-Padlocks has the inventory and the know-how to get it sorted. Our product lineup spans padlocks, Diskus® hardware, hasps, safes, cables, and chains from Master Lock, American Lock, ABUS, SentrySafe, Pacific Lock, Trimax, and The Club.

FAQs

Does the thermoplastic shell on the Master Lock 311 affect how the lock performs in freezing temperatures?

The thermoplastic shell adds weather protection without interfering with the locking mechanism. The 311 handles outdoor conditions well, though extreme cold can affect any padlock. Keeping the shackle and cylinder clear of ice buildup maintains smooth operation year-round.

What makes the 311 particularly suitable for job boxes and gang boxes?

Job boxes and gang boxes sit exposed on work sites and take regular physical abuse. The 311's laminated steel body, hardened shackle, and dual ball-bearing locking mechanism withstand the kind of rough handling and tampering attempts common on active job sites.

Can I order the Master Lock 311 in a keyed-alike set for multiple job site locations?

Yes. The 311KA model comes in a Keyed Alike configuration, so one key opens every lock in the set. This is especially useful for contractors or facility managers overseeing multiple secured points across a single site or across locations.

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