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Nuts 7/8-9 Hvy Hx Nut SS (Jar 25)
Features
- Designed for use with stainless steel bolts and screws with a specified minimum tensile strength equal to or less than the specified proof stress of the mating nut. Both type of stainless are corrosion resistant, with 316 stainless having greater such resistance as well as superior strength at raised temperatures.
- Six-sided internally threaded fastener whose thickness is 0.875 D is the nominal nut size and 1.5 D is their width across the flats, made from austenitic alloys.
Additional Notes
- Other sizes and quantities available by request
Manufacturer Resources
Product Specs
- Arra Compliant:
- N
- Buy American Compliant:
- No
- Division:
- Electrical H1
- Hardness:
- Rockwell B80-C32
- Language Code:
- EN
- Order Minimum Imperial:
- 25
- Order Minimum Uom Imperial:
- EA
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Thread Per Inch:
- 9
- Department:
- Electrical
- Product Subgroup:
- Nuts
- Product Type:
- Heavy Hexagon Nut
- Type2:
- Heavy Hexagon Nut
- Series:
- JHHN
- Product Details:
- Heavy Hexagon Nut
- Product Material:
- 18-8 Stainless Steel
Metallics JHHN78SS – Frequently Asked Questions
1) What thread does the Metallics JHHN78SS heavy hex nut take?
It is a 7/8-9 nut, meaning a 7/8 inch nominal size with 9 threads per inch, which is the UNC coarse pitch for that diameter. It will thread onto any 7/8-9 UNC bolt, rod, or stud. If your anchor rod is fine thread or metric, this is the wrong nut.
2) Is the JHHN78SS nut 18-8 or 316 stainless?
The JHHN78SS is made from 18-8 stainless steel. 18-8 handles general outdoor and damp-location corrosion well, but for marine, chloride, or elevated-temperature service 316 stainless is the better choice, as it has greater corrosion resistance and higher strength at raised temperatures. If a spec calls out 316 specifically, this nut does not meet it.
3) Does the Metallics JHHN78SS meet Buy American or ARRA requirements for a government job?
No. The JHHN78SS is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. On federally funded work with domestic-sourcing clauses, this part will not satisfy them.
4) How is this 7/8 stainless heavy hex nut packaged, and is there a minimum order?
It ships in a jar of 25 pieces, and 25 each is the order minimum. So the smallest buy is one jar. Metallics notes that other sizes and quantities are available by request if a job needs a different count.
5) What is the difference between a heavy hex nut and a standard hex nut in 7/8 inch?
A heavy hex nut is thicker and wider across the flats than a finished hex nut of the same thread. On the JHHN series the thickness runs 0.875 times the nominal nut size and the width across the flats is 1.5 times the nominal size, so a 7/8 nut gives you more bearing area under the wrench and more threads engaged. That matters on structural connections, anchor rods, and heavy strut or channel work. For light-duty fastening a standard hex nut is the usual pick and will seat in tighter clearances.
6) Can I use this stainless nut on a galvanized or plain steel bolt?
Mechanically you can, but match the strength properly: the nut is intended for use with stainless bolts and screws whose specified minimum tensile strength is equal to or less than the proof stress of the nut. Pairing stainless with plain or galvanized steel in a wet location also sets up a dissimilar-metal couple, so for corrosion-critical work use stainless fasteners throughout.
7) Will stainless nuts gall when run down on a 7/8 stainless rod?
Austenitic stainless is prone to thread galling, and the JHHN78SS is an austenitic 18-8 nut with a hardness of Rockwell B80 to C32. Run it on slowly, keep the threads clean, and use an anti-seize on long engagements, which is what the full heavy-hex thickness gives you.
How fast can I get the Metallics JHHN78SS 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 Metallics JHHN78SS come with a warranty?
Absolutely. The Metallics JHHN78SS 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 JHHN78SS?
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installation tips, and troubleshooting. Contact Us
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