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Master Lock Professional Series Keyed Padlock, 1-3/4-in Wide x 1-1/4-in Shackle

Name: Master Lock Professional Series Keyed Padlock, 1-3/4-in Wide x 1-1/4-in Shackle
Brand: Master Lock
SKU: 5001893837
Price: 25.48 USD
Availability: InStock
Rating: 4.5 (17 reviews)

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4.5

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Tue, Sep 8

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The Master Lock no. 6840 Pro series solid body padlock features a 1-3/4in (44mm) wide solid brass body to provide extra resistance in caustic, corrosive environments and a 1-3/16in (30mm) tall, 5/16in (8mm) diameter hardened boron alloy shackle for superior cut resistance. Designed for commercial/industrial applications, a dual ball locking mechanism resists pulling and prying and a high security, rekeyable 5-pin cylinder with spool pins is virtually impossible to pick.

Pro series padlocks are designed for commercial/industrial applications
1-3/4 in wide brass body provides extra corrosion resistance in caustic, corrosive, salty environments
1-3/16in (30mm) tall, 5/16in (8mm) diameter hardened boron alloy shackle for superior cut resistance
Dual ball locking mechanism resists pulling and prying
High security, rekeyable 5-pin cylinder with spool pins is virtually impossible to pick

General
Lock Material	Brass	Series Name	Professional Series
Dial Count	N/A (keyed lock)	Contractor Grade	Yes
Combination Type	N/A (not combination)	Lock Type	Keyed padlock
Keying Type	Keyed alike	Number of Pins	5
Package Quantity	1	Color/Finish Family	Bronze
Use Location	Indoor or Outdoor	Manufacturer Color/Finish	Brass

Dimensions
Width Measurement	1-3/4-in	Shackle Diameter (Inches)	0.313
Height (Inches)	3.291	Shackle Height	1-1/4-in
Thickness (Inches)	0.85	Shackle Width (Inches)	0.906

Features
Shrouded Shackle	No	Keys Included	Yes
Adjustable	No	Rust Protection	Yes
Weatherproof	Yes

Compatibility
For Use with Luggage	No	Wi-Fi Compatibility	No
For Use with Bikes	No	App Compatibility	No
For Use with Laptops	No	Bluetooth Compatibility	No
Works with iOS	No	Smart Compatible	No
Works with Android	No

Certifications
CA Residents: Prop 65 Warning(s)	Prop 65 WARNING(S) -	TSA Accepted	No

Warranty
Warranty	Limited lifetime

Miscellaneous
UNSPSC	46171500

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Review

4.5 out of 5

17 Reviews

3 Star

2 Star

78% Recommend this product

Ratings may include incentivized customer reviews.

17 Customer Reviews

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High security level

Would Not Recommend

Easy security

CustomerJune 2, 2026
Verified Purchaser

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Essential Lock for backflow prev

Would Recommend

I like that it's well made & comes with 2 keys

SkyDoveMay 26, 2026
Verified Purchaser

https://photos-us.bazaarvoice.com/photo/2/cGhvdG86bG93ZXM/06401e7d-a561-576e-8968-00e7c09d7dae

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Boat trailer

Would Recommend

Works great for my boat trailer

Old manMay 21, 2026
Verified Purchaser

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Lost keys

JeffDecember 2, 2025
Verified Purchaser

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THEYK GREAT

Would Recommend

STEVESeptember 17, 2025
Verified Purchaser

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Good lock

Would Recommend

Lock is great, however, Lowe’s was not able to make a duplicate key. Ended up going to another hardware store.

Tim472April 23, 2025
Verified Purchaser

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Master Lock: Featured Videos

COMPARE PRODUCTS

		Name	Current Item Master LockProfessional Series Keyed Padlock, 1-3/4-in Wide x 1-1/4-in Shackle
		Ratings	17
		Keys Included
		Weatherproof
		Shackle Height	1-1/4-in
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		3	4	81	14	81	2


1-1/8-in	1-1/8-in	1-1/8-in	3/4-in	2-1/2-in	2-1/2-in	2-1/2-in	1-1/8-in