Master Lock Hasps

Master Lock Hasps: Built-In Security You Can Count On

When it comes to securing doors, gates, sheds, storage cabinets, and industrial equipment, few names carry the authority of Master Lock. Their lineup of hasps reflects the same engineering discipline and material quality that has made the brand a household name in security — offering solutions that range from everyday property protection to life-safety lockout/tagout (LOTO) applications.

Material Construction and Weatherability

Master Lock hasps are manufactured with an emphasis on durability in demanding environments. Zinc-plated hardened steel is a hallmark material across multiple models — for example, the No. 704DPF and No. 706D feature hard wrought steel bodies with zinc plating for added strength and weatherability. Hardened steel staples and locking eyes are engineered to resist cutting and sawing, providing a physical barrier that complements any padlock you pair with them.

For applications where corrosion or weight are concerns, Master Lock also offers aluminum-bodied hasps. These lighter-weight options maintain the structural integrity expected from the brand while suiting environments where steel oxidation could be a factor.

Single Hinge, Double Hinge, and Straight Bar Designs

Master Lock's hasp range covers multiple hinge configurations to match specific mounting needs. The No. 720DPF is a single hinge hasp at 6-1/4 inches long, featuring a hinged body that is ideal for reaching around corners and securing hard-to-lock property. The No. 722DPF steps up to a double hinge design at 7-3/4 inches, offering even greater flexibility for awkward mounting surfaces. For straightforward, heavy-duty applications, the No. 730DPF is a straight bar hasp at 7-1/4 inches, with a hardened steel staple that resists cutting, sawing, and hammering. At the heavy end of the spectrum, the No. 770 features a solid steel body measuring 9 inches wide by 4-1/2 inches high, designed to withstand forcible attacks and defeat prying and cutting attempts — a preferred choice for vans, trucks, gates, and vending machines.

Safety Lockout/Tagout (LOTO) Hasps

Master Lock is particularly well recognized in industrial and workplace safety circles for their lockout hasps. These specialized hasps are engineered to support multi-worker lockout procedures, keeping equipment inoperative while repairs or adjustments are made. Models like the No. 420 and No. 421 (steel) and the No. 416 and No. 417 (aluminum) can each accommodate up to six padlocks simultaneously, ensuring that a piece of equipment cannot be re-energized until every worker has removed their personal lock. The heavy-duty, pry-proof No. 419 extends that capacity to up to eight padlocks, making it suitable for larger crews on complex machinery. For hazardous environments where sparks are a concern, the No. 428 is constructed from spark-proof nylon material with a 2-1/2 inch inside jaw diameter.

Limited Lifetime Warranty

One of the most compelling reasons to choose Master Lock hasps is the Limited Lifetime Warranty that accompanies many models in the lineup. This warranty reflects Master Lock's confidence in the longevity of their materials and manufacturing processes, giving buyers peace of mind that their investment in security hardware is backed by the brand's long-standing reputation.

Whether you need a standard hardened steel hasp for a storage shed, a hinged model for an unusual mounting surface, or a multi-lock safety hasp for a regulated work environment, Master Lock's hasp selection provides a tested, trusted answer. Browse the full Hasps category or explore everything Master Lock has to offer.