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Nuts 3/8-16 Hx Keps Locknut St-zn (Jar 100)
Features
- External Tooth Lock Washer Attached
Additional Notes
- Other sizes and quantities available by request
Manufacturer Resources
Product Specs
- Arra Compliant:
- N
- Buy American Compliant:
- No
- Division:
- Electrical H1
- Fastener Head Width:
- 0.551 - 0.562 in.
- Fastener Height:
- 0.320 - 0.337
- Fastener Width:
- 0.628 - 0.650
- Field Application:
- Electrical, Plumbing, Heating and Air Conditioning Industries
- Hardness:
- Rockwell C38-44
- Language Code:
- EN
- Neurspe:
- https://ideadigitalasset.com/DAMRoot/Original/10035/11237_ID-SPE-v1-ID-SPE-v1-Hex_Lock_Nut_Steel_Zinc_and_18-8.pdf
- Order Minimum Imperial:
- 100
- Order Minimum Uom Imperial:
- JR
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 3.6 in
- Product Length:
- 3 in
- Product Weight:
- 1.72 lbs
- Product Width:
- 3 in
- Sub Division:
- Electrical-E H2
- Thread Per Inch:
- 16
- Washer Od:
- 0.651 - 0.665 in.
- Department:
- Electrical
- Product Subgroup:
- Nuts
- Product Type:
- Hexagonal Lock Nut
- Type2:
- Hexagonal Lock Nut
- Series:
- JTLN
- Product Finish:
- Zinc
- Product Details:
- Hexagonal Lock Nut
- Product Material:
- Steel
Metallics JTLN7 – Frequently Asked Questions
1) What thread does the Metallics JTLN7 keps locknut take, and will it run on a 3/8 inch rod?
The JTLN7 is a 3/8 inch hex keps locknut cut 16 threads per inch, so it runs on 3/8-16 threaded rod or bolt. Note that standard 3/8 inch all-thread rod sold for electrical hanging is normally 3/8-16, so it matches typical strut and rod work. It will not thread onto 3/8-24 fine thread.
2) Do I need to add a separate lock washer with a keps nut?
No. The keps nut has an external tooth lock washer already attached and free to spin on the nut body, so it goes on as one piece. The attached washer measures 0.651 to 0.665 inch outside diameter, which gives you the bearing surface a loose washer would have provided.
3) Are Metallics JTLN7 locknuts Buy American or ARRA compliant for a government job?
No. The JTLN7 keps locknut is not Buy American compliant and is not ARRA compliant, and country of origin is listed as multiple. If your spec carries a domestic-content clause, this part will not satisfy it.
4) What wrench or socket size fits the Metallics JTLN7 3/8-16 keps nut?
Across the flats the nut measures 0.551 to 0.562 inch, which is a 9/16 inch wrench or socket. Overall width across the corners runs 0.628 to 0.650 inch and the nut stands 0.320 to 0.337 inch tall, so allow for the attached washer when you are working in a tight channel.
5) How many 3/8-16 keps locknuts come in a jar of Metallics JTLN7, and can I buy less?
They ship in a jar of 100 pieces, and the jar is the order minimum, so 100 is the smallest quantity. The filled jar weighs 1.72 lbs. Metallics lists other sizes and quantities as available by request.
6) Will zinc plated steel keps nuts hold up outdoors or in a damp mechanical room?
The JTLN7 is steel with a zinc finish, which is a dry indoor plating. It is fine for interior electrical, plumbing, heating and air conditioning work, but for wet exterior or corrosive duty you want stainless 18-8 hardware in the same 3/8-16 size instead.
7) Can I use a keps nut instead of a nylon insert nut on strut and rod hangers?
Keps nuts like the JTLN7 lock by digging the washer teeth into the clamped surface, so they work where the nut bears directly on steel strut, a channel nut, or a sheet metal bracket, and they go on fast as one piece. A nylon insert nut locks on the thread itself, which is the better choice when the nut does not seat against a hard surface, when the joint gets dismantled repeatedly, or at higher temperatures where nylon is still fine but tooth bite is lost on a painted surface.
8) How hard is a keps nut, and does that mean it can be reused?
These run Rockwell C38-44, a hardened nut. The locking action comes from the attached external tooth washer biting the mounting surface rather than from a deformed thread or nylon insert, so the teeth flatten with use. Treat them as single-use where vibration resistance matters and install fresh nuts on a re-torque.
How fast can I get the Metallics JTLN7 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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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 Metallics JTLN7 come with a warranty?
Absolutely. The Metallics JTLN7 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 Metallics JTLN7?
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installation tips, and troubleshooting. Contact Us
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