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Bolts 5/16-18 x 2-3/16 x 1-3/8 U-Blt SS (Box 50)
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:
- 0.489 - 0.500 in.
- Fastener Height:
- 0.258 - 0.273
- Fastener Length:
- 2/3/16
- Fastener Width:
- 1/3/08
- Field Application:
- Electrical, Plumbing, Heating and Air Conditioning Industries
- Language Code:
- EN
- Material Standard:
- ASTM F594
- Neurspe:
- https://ideadigitalasset.com/DAMRoot/Original/10035/11237_ID-SPE-v1-ID-SPE-v1-U-Bolt_18-8_SS.pdf
- Number Of Nuts:
- 2
- Number Of Pieces:
- 50
- Order Minimum Imperial:
- 50
- Order Minimum Uom Imperial:
- EA
- Pack Type:
- Box
- Product Group:
- Fasteners
- Product Height:
- 3.25 in
- Product Length:
- 7.25 in
- Product Weight:
- 2676 g
- Product Width:
- 171.45 MM
- Sub Division:
- Electrical-E H2
- Thread Per Inch:
- 18
- Thread Standard:
- ANSI/ASME B1.1
- Department:
- Electrical
- Product Subgroup:
- Bolts
- Product Type:
- U-Bolt with Hex Nuts
- Type2:
- U-Bolt with Hex Nuts
- Series:
- UBS
- Product Details:
- U-Bolt with Hex Nuts
- Product Material:
- 18-8 Stainless Steel
Metallics UBS516138 – Frequently Asked Questions
1) What thread size are the Metallics UBS516138 U-bolt and nuts, and what standard do the threads follow?
The threads are 5/16-18, meaning a 5/16 inch diameter with 18 threads per inch, cut to ANSI/ASME B1.1. So any 5/16-18 hex nut, washer, or strut fitting you already stock will thread onto these legs. The two hex nuts that come with each U-bolt are already 5/16-18.
2) Do the Metallics UBS516138 U-bolts come with nuts, or do I have to order those separately?
Nuts are included. Each U-bolt ships with two 5/16-18 hex nuts, so nothing extra is needed to make up the joint other than whatever saddle, plate, or clamp you are bolting through. If your detail calls for washers, those are not part of the assembly.
3) Will a 5/16-18 x 2-3/16 x 1-3/8 U-bolt clamp my pipe or conduit run?
The two numbers that decide it are the 1-3/8 inch opening between the legs and the 2-3/16 inch leg length. The run you are strapping has to pass through that 1-3/8 inch width, and the legs have to reach through your saddle or channel and leave enough stick-out for the two hex nuts. Measure the actual outside diameter of the pipe or conduit, not its trade size, before you commit. Other sizes are available by request if the opening is too tight or too loose.
4) Are these U-bolts stainless, and can they be used outdoors or in a wet mechanical room?
They are 18-8 stainless steel, the common 300-series austenitic grade used where plated carbon steel would rust out. That makes them suitable for damp and outdoor exposure, rooftop pipe supports, and wash-down areas. 18-8 is not the grade to pick for chloride-heavy coastal or pool chemical exposure, where 316 is the usual step up.
5) How many U-bolts are in a box of Metallics UBS516138, and what is the minimum I can order?
They are boxed 50 pieces, and 50 each is the order minimum, so a box is the smallest buy. Each of the 50 U-bolts carries its own pair of hex nuts. Boxed weight is 2676 g.
6) Do these U-bolts meet Buy American and ARRA requirements for a federally funded job?
The UBS516138 U-bolt is flagged compliant for both Buy American and ARRA. Country of origin is listed as multiple, so if your submittal requires a single named origin per lot, ask for the documentation that ships with the box.
7) What spec do the hex nuts on these Metallics stainless U-bolts conform to?
Nut dimensions follow ASME B18.2.2 and the stainless nut material follows ASTM F594, which is the spec a mechanical or electrical submittal usually asks for on stainless fasteners. Width across flats measures 0.489 to 0.500 inch and nut height 0.258 to 0.273 inch, so a 1/2 inch wrench or socket drives them.
8) Is this U-bolt only for electrical work, or can I use it on plumbing and HVAC piping too?
It is sold through the electrical department but the stated field application covers electrical, plumbing, heating and air conditioning work. Same stainless U-bolt and nuts either way, so one box standardizes conduit straps, pipe hangers, and equipment mounting across trades on the same site.
How fast can I get the Metallics UBS516138 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 UBS516138 come with a warranty?
Absolutely. The Metallics UBS516138 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 UBS516138?
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