B-Line Eaton series lock latch...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$169.79
$142.49
B-Line Eaton series lock latch and handle, 4, Black, Ground mount, Locks, latches, inserts, and handles locks, latches and inserts, Type 4-large secu

B-Line Eaton series lock latch and handle, 4, Black, Ground mount, Locks, latches, inserts, and handles locks, latches and inserts, Type 4-large secu

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Model: 3MT4DBLKB
Selected Model is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$169.79
$142.49
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Eaton B-Line series lock latch and handle, NEMA 4, Black, Ground mount, Locks, latches, inserts, and handles locks, latches and inserts, Type 4-large security insert 3mm double bit

Manufacturer Resources

Product Specs

Certifications:
UL Listed
Degree Of Protection:
NEMA 4
Finish Color:
Black
Mounting Method:
Ground
Product Category:
Locks, latches, inserts, & handles locks, latches & inserts
Product Height:
3 in
Product Length Depth:
3 in
Product Weight:
.142 lb
Product Width:
4 in
Department:
Electrical
Product Type:
Triangle flush latch key
Product Details:
Triangle flush latch key

B-LINE 3MT4DBLKB – Frequently Asked Questions

1) What kind of key or insert does the Eaton B-Line 3MT4DBLKB latch use?
It's a 3mm double bit security insert, the large Type 4 style, operated with a triangle flush latch key. If your crews are already carrying 3mm double-bit keys for other B-Line enclosures, this keeps them on the same key rather than adding another one to the ring.
2) Is this B-Line lock latch rated for outdoor enclosures getting hosed down or rained on?
Yes. The latch and handle is rated NEMA 4, which covers hosedown and windblown rain on the enclosure, and it is UL Listed. That makes it suitable for outdoor ground-mounted enclosures and wash-down areas rather than indoor-only NEMA 1 boxes.
3) Do I need a separate key to open this latch, or is a handle enough?
A key is required. This is a flush latch operated by a triangle key with a 3mm double-bit security insert, so it is not a hand-turn or padlock-hasp handle. Order or confirm you have the matching 3mm double-bit triangle key before the enclosure goes in the field, otherwise nobody gets the door open.
4) What are the dimensions and weight of the B-Line 3MT4DBLKB latch assembly?
The unit is listed at 4 in wide by 3 in high by 3 in length/depth, and weighs .142 lb. Use the 4 x 3 footprint to check clearance against the enclosure door flange and any interior panel or DIN rail sitting behind the latch opening.
5) Is this latch for a ground-mounted enclosure or a wall-mounted one?
The mounting method is ground, so this latch and handle is specified for ground-mount B-Line enclosures. If you're hardware-matching a wall-mount or pole-mount cabinet, confirm the latch called out for that enclosure family instead of assuming this one carries over.
6) Is the 3MT4DBLKB the whole latch or just the lock insert?
It's the lock, latch and handle assembly with the Type 4 large security insert, not a bare insert on its own. The part number to order is 3MT4DBLKB.
7) What finish is the B-Line series lock latch and handle, and will it match other enclosure hardware?
Black. It's the standard finish on B-Line ground-mount enclosure latch hardware, so it blends with black powder-coated cabinet doors rather than standing out the way a bright stainless handle would.
How fast can I get the B-LINE 3MT4DBLKB delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the B-LINE 3MT4DBLKB come with a warranty?
Absolutely. The B-LINE 3MT4DBLKB is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the B-LINE 3MT4DBLKB?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the B-LINE 3MT4DBLKB from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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