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Nuts 3/8-16 Hx Nut Blk-Ox (Jar 100)
Additional Notes
- Other sizes and quantities available by request
Manufacturer Resources
Product Specs
- Arra Compliant:
- C
- Buy American Compliant:
- C
- Dimensional Standard:
- ASME B18.2.2
- 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, Air Conditioning Industries
- Language Code:
- EN
- Material Standard:
- ASTM A563
- Neurspe:
- https://ideadigitalasset.com/DAMRoot/Original/10035/11237_ID-SPE-v1-ID-SPE-v1-Hex_Nut_Black_Ox.pdf
- Order Minimum Imperial:
- 100
- Order Minimum Uom Imperial:
- CT
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 2.7 in
- Product Length:
- 3 in
- Product Weight:
- 1.55 lbs
- Product Width:
- 3 in
- Remarks:
- The catalog UPC differ from the tarnsaction daat spreadsheet UPC
- Sub Division:
- Electrical-E H2
- Thread Per Inch:
- 16
- Thread Standard:
- ANSI/ASME B1.1
- Thread Type:
- UNC
- Department:
- Electrical
- Product Subgroup:
- Nuts
- Product Type:
- Hexagonal Nut
- Type2:
- Hexagonal Nut
- Series:
- JN
- Product Finish:
- Black Oxide
- Product Details:
- Hexagonal Nut
- Product Color:
- Black
- Product Material:
- Steel
Metallics JN165BLACK – Frequently Asked Questions
1) What thread does the Metallics JN165BLACK hex nut take?
It is a 3/8 inch nut with 16 threads per inch, coarse UNC form, made to ANSI/ASME B1.1. That means it mates with standard 3/8-16 UNC threaded rod, bolts, and strut hardware. It will not run onto a 3/8-24 fine thread fastener.
2) What wrench or socket size fits these 3/8-16 black oxide hex nuts?
The fastener head width is specified at 0.551 to 0.562 inch, which is the 9/16 inch nominal size a 3/8-16 hex nut is made to under ASME B18.2.2. A 9/16 socket or wrench is what you want on the truck. Corner-to-corner the nut runs 0.628 to 0.650 inch and the height is 0.320 to 0.337 inch, which matters if you are working in a tight channel or behind a panel.
3) Will a 3/8-16 black oxide steel nut hold up outdoors or in a damp mechanical room?
Black oxide is a conversion coating on steel, not a sacrificial barrier like hot-dip galvanizing or zinc plating. The JN165BLACK is steel with a black oxide finish, and it is intended for interior electrical, plumbing, heating and air conditioning work. For wet locations, exterior runs, or corrosive environments, specify a galvanized or stainless 3/8-16 nut instead.
4) Can I use these nuts on 3/8 inch threaded rod for hanging conduit and trapeze supports?
Yes, provided the rod is 3/8-16 UNC, which is the common coarse thread on hanger rod. The nut is dimensioned to ASME B18.2.2, so it seats correctly against standard washers, strut nuts and rod couplings in the same size. Metallics lists it for electrical, plumbing, heating and air conditioning work, which is exactly that kind of hanging and bracing.
5) How do these Metallics hex nuts come packaged, and what is the minimum order?
They ship in a jar of 100 pieces, and 100 count is the order minimum. Jar packaging is practical on a service van or a bench, since you can pour out a handful without a bag splitting in a gang box. Jar weight is listed at 1.55 lbs. Other sizes and quantities can be requested.
6) Does the JN165BLACK hex nut meet Buy American requirements on a federal job?
Metallics lists the JN165BLACK as both ARRA compliant and Buy American compliant, with country of origin China. On federally funded work the two designations are not interchangeable with domestic-melt requirements, so a specifying engineer or contracting officer should confirm which standard the project actually invokes before it goes in a submittal.
7) What standards does this 3/8-16 hex nut conform to for a submittal?
Two standards cover it: ASME B18.2.2 for dimensions and ASTM A563 for the nut material, with threads to ANSI/ASME B1.1. That is the normal set a specification calls out for a carbon steel hex nut, so it drops into a fastener submittal without a substitution request.
8) Is a plain hex nut like this enough on a vibrating load, such as a rooftop unit hanger?
A plain finished hex nut has no locking feature. On a load that vibrates, back it up with a second nut jammed against it, a lock washer, or step to a nylon insert or all-metal prevailing torque nut in 3/8-16. The JN165BLACK is a standard hexagonal nut to ASME B18.2.2 and should be treated as a static-load fastener on its own.
9) Will the black oxide finish match other black hardware on an exposed ceiling?
The nut is finished black oxide and listed in black, so it reads dark rather than bright like zinc. Black oxide is a thin conversion coating, so the tone is a satin black that sits close to black-painted strut and rod but is not a paint match. Where the finish is visible and must match exactly, paint after assembly.
How fast can I get the Metallics JN165BLACK delivered?
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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 JN165BLACK come with a warranty?
Absolutely. The Metallics JN165BLACK is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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