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Nuts 3/8-16 Short Spring Nut St-zn (Box 100)
Additional Notes
- Other sizes and quantities available by request, *indicates short spring
Manufacturer Resources
Product Specs
- Arra Compliant:
- N
- Buy American Compliant:
- No
- Country Of Origin:
- MUL
- Division:
- Electrical H1
- Fastener Height:
- 0.353 - 0.370
- Fastener Length:
- 1.316 - 1.380
- Fastener Width:
- 0.725 - 0.770
- Field Application:
- Electrical, Plumbing, Heating and Air Conditioning Industries
- Hardness:
- Rockwell HR15N 78-90
- Language Code:
- EN
- Material Standard:
- C1015 - C1020
- Neurspe:
- https://ideadigitalasset.com/DAMRoot/Original/10035/11237_ID-SPE-v1-ID-SPE-v1-Sprg_Nut_St-Zn.pdf
- Order Minimum Imperial:
- 100
- Order Minimum Uom Imperial:
- CT
- Pack Type:
- Box
- Product Family:
- Electrical Supplies
- Product Group:
- Fasteners
- Product Height:
- 3.25 in
- Product Length:
- 7.25 in
- Product Weight:
- 8.34 lbs
- Product Width:
- 6.75 in
- Sub Division:
- Electrical-E H2
- Thread Per Inch:
- 16
- Thread Standard:
- ANSI/ASME B1.1
- Department:
- Electrical
- Product Subgroup:
- Nuts
- Product Type:
- Spring Nut
- Type2:
- Spring Nut
- Series:
- MSNS
- Product Finish:
- Zinc
- Product Details:
- Spring Nut
- Product Material:
- Steel
Metallics MSNS3816 – Frequently Asked Questions
1) Will the Metallics MSNS3816 spring nut thread onto a standard 3/8-16 rod or bolt?
Yes. The MSNS3816 is a 3/8-16 spring nut, cut 16 threads per inch to ANSI/ASME B1.1, so it takes any standard 3/8-16 UNC threaded rod, bolt, or hanger rod. That is the same thread found on common 3/8 inch all-thread used for conduit and pipe hanging.
2) What is the difference between a short spring nut and a long spring nut?
The spring leg length is the difference, and it is set by the depth of the channel you are filling. The MSNS3816 is the short spring version, measuring 1.316 to 1.380 inches long, 0.725 to 0.770 wide and 0.353 to 0.370 high. Short springs are meant for shallower strut; a long spring nut has a taller spring to bridge a deeper channel and hold the nut against the inturned lips while you set it. Match the spring to the channel depth or the nut will either bottom out or sit loose.
3) Are Metallics MSNS3816 spring nuts acceptable on a Buy American or ARRA funded job?
No. The MSNS3816 is listed as not Buy American compliant and not ARRA compliant, with country of origin shown as multiple. If your project carries a domestic-sourcing clause, this part will not satisfy it and you need a domestically produced channel nut.
4) Is this spring nut OK for outdoor or damp mechanical room use?
It is zinc plated steel, which is a general indoor and protected-environment finish. Zinc plating handles humidity and incidental moisture in mechanical rooms, parking structures and ceiling plenums, but it is not a stainless or hot-dip part for constant weather exposure, salt spray or wash-down areas. For those, specify a stainless or hot-dip galvanized channel nut instead.
5) How many spring nuts come in a box of Metallics MSNS3816, and can I buy fewer?
They ship as a box of 100 pieces, and 100 is the order minimum, so that box is the smallest quantity. The full box runs 8.34 lbs. Metallics does offer other sizes and quantities by request.
6) What trades actually use these 3/8-16 spring nuts?
Electrical, plumbing, and heating and air conditioning work. The typical use is hanging conduit racks, strut-mounted pipe clamps, duct supports and equipment off channel, where the nut has to be dropped into the strut and turned a quarter turn with the spring holding it in place overhead. The 3/8-16 size is the workhorse for trapeze and rod-hung supports.
7) How hard is the steel on these channel spring nuts, and will the teeth bite into strut?
The body is low carbon steel in the C1015 to C1020 range, case treated to Rockwell HR15N 78-90. That surface hardness is what lets the serrated face grip the inturned lips of the channel instead of deforming under load, while the softer core keeps the nut from cracking when torqued.
8) Do I need anything else besides the spring nut to mount to strut?
Yes, the nut is only one piece of the connection. You still need the 3/8-16 bolt or threaded rod, a washer where the fitting calls for one, and the clamp, bracket or fitting being attached. The MSNS3816 supplies the threaded anchor point in the channel and nothing more.
How fast can I get the Metallics MSNS3816 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 MSNS3816 come with a warranty?
Absolutely. The Metallics MSNS3816 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 MSNS3816?
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