Metallics JSRM721 5/16-18 x 3/...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,157.14
Metallics JSRM721 5/16-18 x 3/4 in. Round Head Slotted Machine Screws - 316 Stainless - 100qty

Metallics JSRM721 5/16-18 x 3/4 in. Round Head Slotted Machine Screws - 316 Stainless - Each

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Model: JSRM721
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,157.14
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5/16-18 x 3/4 in. Round Head Slotted Machine Screws - 316 Stainless - 100qty

  • Features

    • 316 stainless Material
    • 5/16-18 Diameter, 3/4" Length
    • Round head with slotted Drive

Manufacturer Resources

Product Specs

Minimum Purchase:
100 units
Division:
Electrical H1
Fastener Head Type:
Round
Pack Type:
Jar
Product Group:
Fasteners
Sub Division:
Electrical-E H2
Department:
Electrical
Product Subgroup:
Screws
Product Material:
316 Stainless

Metallics JSRM721 – Frequently Asked Questions

1) What thread size and length are the Metallics JSRM721 machine screws?
The JSRM721 is a 5/16-18 machine screw, 3/4 inch long under the head. 5/16-18 is the coarse (UNC) thread pitch, so it mates with a standard 5/16-18 nut or a tapped 5/16-18 hole.
2) Will 316 stainless machine screws hold up outdoors or in a coastal or wash-down area?
316 stainless is the marine-grade austenitic alloy, with molybdenum added for chloride resistance, so these screws suit exterior, coastal, and wet or wash-down locations where 18-8/304 hardware pits. That makes them a reasonable pick for outdoor enclosures, food-service and healthcare wash-down rooms, and pool or rooftop equipment.
3) What driver do I need for the JSRM721 screws, and can I run them with a drill?
They have a slotted drive, so you need a flat blade screwdriver sized to the slot. Slotted heads cam out easily under power, so hand driving or a low-torque driver is the practical approach; if you want to run them fast with an impact driver, choose a Phillips or hex-head machine screw instead.
4) Is a round head machine screw the right choice, or should I use a flat head?
Round head is a domed, non-countersunk head that bears on the surface of the part, so it is the choice for untapped flat sheet, enclosure covers, strut fittings, and ground lug work where there is no countersink. If the drawing calls for a flush surface in a countersunk hole, you need a flat head machine screw, not this one.
5) Do the Metallics 5/16-18 machine screws come with nuts or washers?
No. The JSRM721 is the screw only, so order 5/16-18 nuts and any flat or lock washers separately. For a 316 stainless installation, match the nuts and washers in 316 as well, since mixing alloys in a wet location invites galvanic corrosion at the joint.
6) How are the Metallics JSRM721 screws packaged?
They ship in a jar, which is how Metallics packages its small fastener counts for a truck or shop shelf. Handy for MRO stock where you pull a few screws at a time rather than opening a bulk box.
7) What is the usable grip with a 3/4 inch machine screw?
Length on a machine screw is measured from under the round head to the point, so the full 3/4 inch is thread. Subtract your material stack plus washers and nut height to confirm the screw still engages enough thread; for thicker assemblies step up to a longer 5/16-18 screw.
How fast can I get the Metallics JSRM721 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 JSRM721 come with a warranty?
Absolutely. The Metallics JSRM721 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 JSRM721?
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 JSRM721 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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