Metallics 5/16-18 Hexagonal Se...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$152.86
Metallics JSFN51618SS Nuts 5/16-18 Serr Flange Locknut SS (Jar 100)

Metallics 5/16-18 Hexagonal Serrated Flange Lock Nuts - 18-8 Stainless Steel (Jar of 100)

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Model: JSFN51618SS
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Metallics 5/16-18 Hexagonal Serrated Flange Lock Nuts - 18-8 Stainless Steel (Jar of 100)

Professional Grade Fastening Solutions for Electrical Applications

Metallics delivers reliable fastening performance with these 5/16-18 hexagonal serrated flange lock nuts manufactured from 18-8 stainless steel. Designed for electrical applications, these lock nuts feature serrated flanges for enhanced grip and vibration resistance. The convenient jar packaging contains 100 pieces, meeting ASME B18.16.4-2008 dimensional standards for consistent quality and compatibility.

Professional Features & Benefits

  • 18-8 Stainless Steel Construction: Provides excellent corrosion resistance and durability for long-lasting performance in demanding environments.
  • 5/16-18 Thread Specification: Standard threading ensures compatibility with a wide range of electrical components and applications.
  • Hexagonal Serrated Flange Design: Serrated flange provides superior grip and prevents loosening due to vibration or thermal cycling.
  • ASME B18.16.4-2008 Compliance: Meets dimensional standards for consistent quality and reliable performance in professional installations.
  • Convenient Jar Packaging: 100-piece jar format provides organized storage and easy access for efficient project completion.
  • Electrical Grade Quality: Specifically designed for electrical applications with appropriate material properties and dimensional tolerances.

Technical Specifications

  • Arra Compliant: C
  • Buy American Compliant: C
  • Country Of Origin: MUL
  • Department: Electrical
  • Dimensional Standard: ASME B18.16.4-2008
  • Division: Electrical H1
  • Fastener Head Width: 0.489 - 0.500 in.
  • Fastener Height: 0.268 - 0.283
  • Fastener Width: 0.557 - 0.577
  • Height: 2.7 in
  • Language Code: EN
  • Material: 18-8 Stainless Steel
  • Neurspe: https://ideadigitalasset.com/DAMRoot/Original/10035/11237_ID-SPE-v1-ID-SPE-v1-Hex_Serr_Flange_Lck_Nut_St-Zn_18-8_SS.pdf
  • Order Minimum Imperial: 100
  • Order Minimum Uom Imperial: CT
  • Pack Type: Jar
  • Panel Thickness: 0.04 IN
  • Product Details: Hexagonal Serrated Flange Lock Nut
  • Product Family: Electrical Supplies
  • Product Group: Fasteners
  • Product Height: 68.58 MM
  • Product Length: 3 in
  • Product Subgroup: Nuts
  • Product Type: Hexagonal Serrated Flange Lock Nut
  • Product Weight: 626 g
  • Product Width: 76.2 MM
  • Series: JSFN
  • Sub Division: Electrical-E H2
  • Thread Per Inch: 18
  • Type2: Hexagonal Serrated Flange Lock Nut
  • Washer Od: 0.660 - 0.680 in.
  • Weight: 1.38 lbs
  • Width: 3 in
  • Wrenching Height: 0.17

Professional Applications

  • Electrical Panel Assembly and Maintenance
  • Commercial Electrical Installations
  • Industrial Equipment Fastening
  • Electrical Component Mounting
  • Professional Electrical Repair Services
  • Maintenance and Service Operations

Why Choose Metallics Quality?

Metallics fasteners meet rigorous dimensional standards including ASME B18.16.4-2008 compliance, ensuring consistent quality and reliable performance. The 18-8 stainless steel construction provides superior corrosion resistance, while the convenient jar packaging supports efficient project management and inventory control for professional electrical applications.

Manufacturer Resources

Product Specs

Arra Compliant:
C
Buy American Compliant:
C
Dimensional Standard:
ASME B18.16.4-2008
Division:
Electrical H1
Fastener Head Width:
0.489 - 0.500 in.
Fastener Height:
0.268 - 0.283
Fastener Width:
0.557 - 0.577
Language Code:
EN
Neurspe:
https://ideadigitalasset.com/DAMRoot/Original/10035/11237_ID-SPE-v1-ID-SPE-v1-Hex_Serr_Flange_Lck_Nut_St-Zn_18-8_SS.pdf
Order Minimum Imperial:
100
Order Minimum Uom Imperial:
CT
Pack Type:
Jar
Panel Thickness:
0.04 IN
Product Group:
Fasteners
Product Height:
2.7 in
Product Length:
3 in
Product Weight:
1.38 lbs
Product Width:
3 in
Sub Division:
Electrical-E H2
Thread Per Inch:
18
Washer Od:
0.660 - 0.680 in.
Wrenching Height:
0.17
Department:
Electrical
Product Subgroup:
Nuts
Product Type:
Hexagonal Serrated Flange Lock Nut
Type2:
Hexagonal Serrated Flange Lock Nut
Series:
JSFN
Product Details:
Hexagonal Serrated Flange Lock Nut
Product Material:
18-8 Stainless Steel

Metallics JSFN51618SS – Frequently Asked Questions

1) Will a 5/16-18 serrated flange lock nut thread onto a standard 5/16 inch coarse bolt?
No. The Metallics JSFN51618SS is cut at 18 threads per inch, which is 5/16-24... to be clear: 18 TPI is the UNC coarse pitch for 5/16 inch, so it mates with standard 5/16-18 coarse-thread bolts, studs and all-thread. It will not run onto 5/16-24 fine-thread fasteners.
2) Do I still need a washer with a serrated flange nut, or does the flange replace it?
The flange does the washer's job. Its outside diameter is 0.660 to 0.680 inches, which spreads load like an integral washer, and the serrations bite the bearing surface to resist loosening from vibration or thermal cycling. No separate flat washer or split lock washer is needed. Keep in mind the serrations mar the surface they seat against, so on a painted or finished panel face you may want a plain flange nut instead.
3) Will these nuts interchange with other brands' 5/16-18 serrated flange locknuts on a spec job?
They are built to ASME B18.16.4-2008 dimensional standards, so the hex, flange diameter and height fall within the same envelope as any other B18.16.4 flange nut in 5/16-18. That means they drop into existing hardware on a panel or frame without re-sizing wrenches or clearance holes.
4) What wrench or socket size do I need for these 5/16-18 flange lock nuts?
Across the hex flats the nut measures 0.489 to 0.500 inches, so a 1/2 inch wrench or socket fits. Corner-to-corner it runs 0.557 to 0.577 inches, and the wrenching height on the hex is 0.17 inches, so use a thin-wall socket in tight panel work rather than a deep socket that may bear on the flange.
5) How much clearance do I need behind the panel for these nuts?
Allow about 0.283 inches of depth for the nut body, since the overall fastener height runs 0.268 to 0.283 inches, plus whatever bolt thread protrudes past it. The listed panel thickness for the application is 0.04 inches, typical of sheet-steel enclosure and strut work.
6) Are stainless flange lock nuts OK for outdoor or wet-location electrical work?
18-8 stainless steel holds up well to moisture and general corrosion, which is why these are used on exterior enclosures, damp mechanical rooms and equipment exposed to washdown. Pair them with stainless bolts of the same grade family to avoid galvanic mismatch. For chloride-heavy coastal or pool chemical environments, 316 stainless is the harder-wearing choice.
7) Do these stainless lock nuts meet Buy American or ARRA requirements for a public project?
Both the ARRA and Buy American compliance flags on the Metallics JSFN51618SS are marked C, and country of origin is listed as multiple (MUL). On a federally funded job, have the specific lot's origin documentation confirmed against your project's domestic-content clause before submittal.
8) How are Metallics JSFN51618SS lock nuts packaged, and what is the minimum order?
They ship in a jar of 100 pieces, and 100 count is the order minimum, so one jar is the smallest buy. The jar weighs 1.38 lbs. The container format suits a shop shelf or a service van bin better than a loose bag.
9) Can these be reused if I have to take the connection apart?
Serrated flange nuts are prevailing-torque by way of the serrations digging into the mating surface, not a nylon insert, so the thread itself is undamaged by removal. The locking action depends on fresh serration bite, though, so on a critical vibration-prone joint use a new nut on reassembly rather than the one you backed off.
How fast can I get the Metallics JSFN51618SS 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 JSFN51618SS come with a warranty?
Absolutely. The Metallics JSFN51618SS 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 JSFN51618SS?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Metallics JSFN51618SS from ZenSupply?
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