B-Line Eaton series lock latch...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$184.73
$157.85
B-Line Eaton series lock latch and handle, 4, Type 4 quarter-turn enclosure locks and latches for JIC and ground mount, JIC, Locks, latches, inserts,

B-Line Eaton series lock latch and handle, 4, Type 4 quarter-turn enclosure locks and latches for JIC and ground mount, JIC, Locks, latches, inserts,

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Model: T4WNBM
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$184.73
$157.85
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Manufacturer Resources

Product Specs

Certifications:
UL Listed
Degree Of Protection:
NEMA 4
Product Category:
Locks, latches, inserts, & handles locks, latches & inserts
Product Height:
.75 in
Product Length Depth:
.75 in
Product Weight:
.096 lb
Product Width:
.625 in
Special Features:
48" X 36" panel
Department:
Electrical
Product Group:
Enclosures & Boxes
Product Subgroup:
Locks & Handles
Product Type:
Type 4 quarter-turn enclosure locks & latches for JIC & ground mount
Product Details:
Type 4 quarter-turn enclosure locks & latches for JIC & ground mount

B-LINE T4WNBM – Frequently Asked Questions

1) Will the Eaton B-Line T4WNBM wing knob keep a NEMA 4 enclosure watertight?
Yes. The T4WNBM quarter-turn wing knob insert is rated NEMA 4, so it holds the Type 4 degree of protection on the enclosure door when installed as intended. It is also UL Listed. Type 4 covers hosedown and windblown dust and rain conditions, which is why it is the insert used on JIC and ground-mount enclosures rather than an indoor-only latch.
2) Is the T4WNBM a keyed lock or a hand-operated latch?
It is a hand-operated quarter-turn latch, not a keyed cylinder. The insert uses a small wing knob in a black finish, so an electrician or maintenance tech opens the panel by hand with a quarter turn. If the panel has to be secured against unauthorized access, you want a keyed or padlockable insert instead of this wing knob version.
3) What size enclosure door is the B-Line T4WNBM wing knob insert intended for?
It is listed for a 48 inch by 36 inch panel, which is a common JIC or ground-mount enclosure door size. The insert itself is small hardware: .75 by .75 by .625 inches and .096 lb, so it drops into the standard quarter-turn prep in the door rather than adding bulk to the enclosure.
4) I need to restock latch inserts for a bank of B-Line JIC enclosures. What exact part do I order?
Order Eaton B-Line part number T4WNBM. That is the Type 4 small wing knob insert in black finish from the B-Line lock, latch and handle line. Ordering by that MPN keeps every enclosure door in the group opening the same way, which matters when techs are moving between panels.
5) Is this the whole latch assembly or just the insert?
The T4WNBM is the insert portion of the quarter-turn latch, the wing knob piece that goes into the door hardware. B-Line catalogs it under locks, latches and inserts. If your enclosure door has no quarter-turn prep or you are missing the body and cam, you need those pieces too, not just this knob.
How fast can I get the B-LINE T4WNBM 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 T4WNBM come with a warranty?
Absolutely. The B-LINE T4WNBM 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 T4WNBM?
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 T4WNBM 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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