McMaster-Carr logo
    Filter by
    Unlocks With
    DFARS Specialty Metals
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Industrial Info Snippet
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Thermocouple Type
    Industrial Info Compare
    Minimum Temperature
    RTD Probe Resistance
    Electrical Connection
    Body Thickness
    Attribute Image
    Keyhole Location
    Key-Locking Mechanism
    Electrical Connection Type
    Output Analog Signal
    Diameter
    Attribute Image
    Shackle Diameter
    Attribute Image
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    25 Products

    Enclosed-Shackle Padlocks

    Image of ProductInUse. Padlock and Hasp (Sold Separately). Front orientation. Padlocks. Enclosed-Shackle Padlocks.
    Image of Product. Front orientation. Padlocks. Enclosed-Shackle Padlocks.
    Image of Attribute. Back orientation. Contains Annotated. Enclosed Shackle.

    Padlock and Hasp

    (Sold Separately)

    Keep your shackle hidden to thwart break-in attempts. Also known as hockey puck locks, these padlocks have a fully enclosed shackle on the back for greater security than standard padlocks. Designed to resist bolt cutting and prying, they’re often used on transport vans to prevent theft.
    Keyed Differently
    Each lock opens with a different key. All have random key numbers.
    Chrome-Plated Steel Body with—A chrome plating guards these locks from scratches and corrosion. Made of steel, they're stronger than stainless steel locks.
    Powder-Coated Zinc-Plated Steel Body—Powder coated for an additional layer of protection, these steel locks resist corrosion better than chrome-plated ones. They're stronger than stainless steel locks.
    Stainless Steel Body with—Our most corrosion-resistant padlocks.
    Pin Tumbler—Harder to pick than warded and disc-tumbler locking mechanisms.
    Disc Tumbler—Disc-tumbler locking mechanisms offer good pick resistance.
    Metal Keyhole Cover—Shield the keyhole from water and debris so the cylinder won't freeze, jam, or corrode.
    Shackle
    Body
    Vertical
    Clearance
    Horizontal
    Clearance
    Dia.
    Opening
    Ht.
    Opening
    Wd.
    Ht.
    Wd.
    Dia.
    Thk.
    Construction
    Manufacturer and
    Model Number
    Key-Locking
    Mechanism
    Keyhole Cover
    Material
    Number of Tumbler
    Pins/Discs
    Specs.
    Met
    Color
    Includes
    Cannot Be Sold To
    Each
    Chrome-Plated Steel Body with
    ——3/8"9/16"1 3/4"——2 7/8"1 1/2"SolidAmerican Lock 2010Pin Tumbler—6————1749A31000000
     
    Powder-Coated Zinc-Plated Steel Body
    5/8"3/4"1/2"——3 1/8"8 5/8"—1 1/2"SolidAbus Lock 141/200 CDisc TumblerMetal5—BlackHasps—1749A38900000
     
    Stainless Steel Body with
    ——3/8"9/16"1 3/4"——2 7/8"1 1/2"Solid—Pin Tumbler—6UL 437——Outside United States1749A388000000
     
    Hasps
    Image of Product. Front orientation. Hasps.
    Ht.
    Lg.
    Thk.
    Material
    Each
    4 1/2"9"1/4"Steel
    		1749A25000000
    Keyed Alike
    Choose these locks if you need several that open with the same key.
    Chrome-Plated Steel Body with—A chrome plating guards these locks from scratches and corrosion. Made of steel, they're stronger than stainless steel locks.
    Stainless Steel Body with—Our most corrosion-resistant padlocks.
    Pin Tumbler—Harder to pick than warded and disc-tumbler locking mechanisms.
    Shackle
    Body
    Dia.
    Opening
    Ht.
    Opening
    Wd.
    Dia.
    Thk.
    Construction
    Manufacturer and
    Model Number
    Key-Locking
    Mechanism
    Key No.
    Number of Tumbler
    Pins/Discs
    Specs.
    Met
    Cannot Be Sold To
    Each
    Chrome-Plated Steel Body with
    3/8"9/16"1 3/4"2 7/8"1 1/2"SolidAmerican Lock 2010Pin Tumbler130416——1749A32000000
    3/8"9/16"1 3/4"2 7/8"1 1/2"SolidAmerican Lock 2010Pin Tumbler845006——1749A3300000
     
    Stainless Steel Body with
    3/8"9/16"1 3/4"2 7/8"1 1/2"Solid—Pin TumblerHA444741GYO6UL 437Outside United States1749A128000000
    3/8"9/16"1 3/4"2 7/8"1 1/2"Solid—Pin TumblerHA444753ENE6UL 437Outside United States1749A129000000
     
    Hasps
    Image of Product. Front orientation. Hasps.
    Ht.
    Lg.
    Thk.
    Material
    Each
    4 1/2"9"1/4"Steel
    		1749A25000000
    Master Keyed
    Choose these locks if you want individual locks or groups of locks that open with their own key as well as a master key. The included keys have random key numbers; master keys are sold separately.
    Chrome-Plated Steel Body with—A chrome plating guards these locks from scratches and corrosion. Made of steel, they're stronger than stainless steel locks.
    Stainless Steel Body with—Our most corrosion-resistant padlocks.
    Pin Tumbler—Harder to pick than warded and disc-tumbler locking mechanisms.
    Padlocks
    Master Keys
    Shackle
    Body
    Dia.
    Opening
    Ht.
    Opening
    Wd.
    Dia.
    Thk.
    Construction
    Manufacturer and
    Model Number
    Key-Locking
    Mechanism
    Master
    Key No.
    Number of Tumbler
    Pins/Discs
    Specs.
    Met
    Cannot Be Sold To
    Each
    Each
    Chrome-Plated Steel Body with
    3/8"9/16"1 3/4"2 7/8"1 1/2"SolidAmerican Lock 2010Pin Tumbler401M66——1749A340000001749A2100000
     
    Stainless Steel Body with
    3/8"9/16"1 3/4"2 7/8"1 1/2"Solid—Pin TumblerH000836UL 437Outside United States1749A3010000001749A30200000
     
    Hasps
    Image of Product. Front orientation. Hasps.
    Ht.
    Lg.
    Thk.
    Material
    Each
    4 1/2"9"1/4"Steel
    		1749A25000000

    RTD Transmitters

    Convert signals from your RTD probe into signal types that data loggers, controllers, and other instruments can read.
    Head Mount
    Image of ProductInUse. Transmitter Shown Installed (Head and Probe Not Included). Front orientation. RTD Transmitters. Head Mount.
    Image of Product. Bottom orientation. RTD Transmitters. Head Mount, Round.

    Transmitter Shown

    Installed (Head and

    Probe Not Included)

    Round

    For RTD Probe
    Resistance, ohm
    Temp. Range,
    ° F
    Dia.
    Dp.
    Voltage,
    V DC
    Output Analog
    Signal
    Housing
    Material
    For Max.
    Wire Ga.
    Each
    Round
     
    Screw-Terminal Wire Connection
    1000 to 2501 11/16"13/16"12 to 364 mA to 20 mAPlastic26
    		38875K77000000
    1000 to 5001 11/16"13/16"12 to 364 mA to 20 mAPlastic26
    		38875K7800000
     
    Thread In
    Image of Product. Front orientation. RTD Transmitters. Thread In.
    Thread-in transmitters automatically recognize the probe type, so you don’t need to program them to match. They communicate via IO Link, which lets you change settings, read measurements, and receive error messages remotely when connected to a PLC via an IO Link controller (not included).
    For RTD Probe Resistance,
    ohm
    Temp. Range,
    ° F
    Dia.
    Dp.
    Voltage,
    V DC
    Output Analog
    Signal
    Control Communication
    Protocol
    Housing
    Material
    Enclosure
    Rating
    Each
    4-Pole M12
    100/1,000-55 to 3003/4"2"20 to 324 mA to 20 mAIO-LinkPlasticIP67
    		38875K910000000
    100/1,00032 to 2123/4"2"18 to 320V DC to 10V DCIO-LinkPlasticIP67
    		38875K94000000
    100/1,00032 to 2123/4"2"20 to 324 mA to 20 mAIO-LinkPlasticIP67
    		38875K92000000
     

    Thermocouple Transmitters

    Convert thermocouple probe signals to a 4-20 mA signal for use with instrumentation, data loggers, and controllers.
    Head Mount
    Image of ProductInUse. Transmitter Shown Installed (Connection Head and Probe Not Included). Front orientation. Thermocouple Transmitters. Head Mount.
    Image of Product. Front orientation. Thermocouple Transmitters. Head Mount.

    Transmitter Shown

    Installed

    (Connection Head and

    Probe Not Included)

    Temp. Range,
    ° F
    Dia.
    Dp.
    Output Analog
    Signal
    Voltage,
    V DC
    Housing
    Material
    For Max.
    Wire Ga.
    Each
    For Type J Thermocouples
    32 to 5721 11/16"13/16"4 mA to 20 mA12 to 24Plastic26
    		38875K81000000
    32 to 1,2921 11/16"13/16"4 mA to 20 mA12 to 24Plastic26
    		38875K7300000
     
    For Type K Thermocouples
    32 to 5721 11/16"13/16"4 mA to 20 mA12 to 24Plastic26
    		38875K11000000
    32 to 1,1121 11/16"13/16"4 mA to 20 mA12 to 24Plastic26
    		38875K8200000
    32 to 2,1921 11/16"13/16"4 mA to 20 mA12 to 24Plastic26
    		38875K7400000
     
    For Type T Thermocouples
    32 to 2121 11/16"13/16"4 mA to 20 mA12 to 24Plastic26
    		38875K12000000
    32 to 7521 11/16"13/16"4 mA to 20 mA12 to 24Plastic26
    		38875K13000000
     

    Enclosed-Shackle Resettable Combination Padlocks

    Image of ProductInUse. Padlock and Hasp (Sold Separately). Front orientation. Padlocks. Enclosed-Shackle Resettable Combination Padlocks.
    Image of Product. Front orientation. Padlocks. Enclosed-Shackle Resettable Combination Padlocks.
    Image of Attribute. Back orientation. Contains Annotated. Enclosed Shackle.

    Padlock and Hasp (Sold

    Separately)

    With a fully enclosed shackle on the back, these padlocks are more secure than standard padlocks. Also known as hockey puck locks, they prevent bolt-cutting and prying attempts, so they’re often used on transport vans. Set your own combination and change it at any time.
    Steel Combination Cover—Shield the rolling digits from water and debris so they won't freeze, jam, or corrode.
    Body
    Shackle
    Dia.
    Thk.
    Construction
    Combination Type
    No. of Possible
    Combinations
    Combination
    Cover Material
    Each
    Chrome-Plated Hardened Steel Body with Boron Shackle
    13/32"1 21/32"SolidFour-Number Rolling Digit10,000Steel7689N110000000
     
    Hasps
    Image of Product. Front orientation. Hasps.
    Ht.
    Lg.
    Thk.
    Material
    Each
    4 1/2"9"1/4"Steel
    		1749A25000000
    back to top