Metallics JSHC51678 5/16-18 x ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$192.86
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Metallics JSHC51678 5/16-18 x 7/8 in. Socket Head Hex Cap Screws - Alloy Steel Black - Each

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Model: JSHC51678

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

$192.86
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5/16-18 x 7/8 in. Socket Head Hex Cap Screws - Alloy Steel Black - 100qty

  • Additional Notes

    • Other sizes and quantities available by request | Cap screws of a length 3D or greater, where D equals the nominal diameter of the screw, are subject to tensile strength, yield strength, elongation and reduction of area testing.

  • Features

    • Supplies greater tensile strength than equivalent sizes of Grade-5 or Grade-8 hex head cap screws while requiring less surface area or counterbore since the fastener is intenally wrenched.
    • Elongation is 10% minimum (applies to machined specimens of lenglh at least 4D where D equals the nominal diameter of the screw) and Reduction of Area is 33% minimum (applies to machined specimens)
    • 5/16-18 Diameter, 7/8" Length
    • Socket head with Hex Drive
    • Alloy Steel Black Material

Manufacturer Resources

Product Specs

Minimum Purchase:
100 units
Arra Compliant:
N
Buy American Compliant:
No
Dimensional Standard:
ASME B18.3-2012
Division:
Electrical H1
Drive Type:
Hex
Fastener Head Height:
0.306 - 0.312 in.
Fastener Head Type:
Socket
Fastener Head Width:
0.457 - 0.469 in.
Fastener Length:
8-Jul
Field Application:
Electrical, Plumbing, Heating and Air Conditioning Industries
Hardness:
Rockwell C39
Hex Size:
4-Jan
Language Code:
EN
Neurspe:
https://ideadigitalasset.com/DAMRoot/Original/10035/11237_ID-SPE-v1-ID-SPE-v1-Socket_Head_Cap_Screw_Alloy_Zinc.pdf
Order Minimum Imperial:
100
Order Minimum Uom Imperial:
JR
Pack Type:
Jar
Product Group:
Fasteners
Product Height:
2.7 in
Product Length:
3 in
Product Weight:
2.32 lbs
Product Width:
3 in
Slot Depth:
0.151
Sub Division:
Electrical-E H2
Tensile Strength:
180000 psi minimum
Thread Per Inch:
18
Thread Type:
UN
Wall Thickness:
0.119
Yield Strength:
162000 psi minimum
Department:
Electrical
Product Subgroup:
Screws
Product Type:
Cap Screw
Type2:
Cap Screw
Series:
SHC
Product Finish:
Black
Product Details:
Cap Screw
Product Material:
Alloy Steel Black

Metallics JSHC51678 – Frequently Asked Questions

1) Will a 5/16-18 socket head cap screw thread into my existing 5/16-18 tapped hole or nut?
Yes. The Metallics JSHC51678 is a 5/16-18 screw, meaning 5/16 inch nominal diameter with 18 threads per inch in the UN (Unified National) thread form, so it mates with any standard 5/16-18 tapped hole, nut, or insert. Usable length is 7/8 inch under the head.
2) Will the head of this 5/16-18 socket cap screw fit in a standard counterbore?
Head width runs 0.457 to 0.469 inch and head height 0.306 to 0.312 inch, which is the ASME B18.3 socket head envelope for a 5/16 screw. A counterbore cut for a 5/16 socket head cap screw takes it. That compact head is the reason to use a socket cap here: it needs far less surface area or counterbore than a hex head cap screw of the same diameter, which is useful in tight brackets, strut, and panel work.
3) Is a socket head cap screw stronger than a Grade 8 hex bolt the same size?
For this alloy steel screw, yes. Minimum tensile strength is 180,000 psi with 162,000 psi minimum yield, above what equivalent sizes of Grade 5 or Grade 8 hex head cap screws deliver, and it does it in a smaller head. Hardness is Rockwell C39. If you need an externally wrenched head for a box wrench or impact socket, a Grade 8 hex bolt is the better choice; if clearance is tight and you want the strength, this is the one.
4) Do these cap screws meet Buy American requirements for a government or public job?
No. The Metallics JSHC51678 is not Buy American compliant and is not ARRA compliant, and country of origin is listed as multiple. If your contract carries a domestic sourcing clause, this part will not satisfy it and you need a domestically produced socket head cap screw.
5) Can I use these black alloy steel cap screws outdoors or in a wet location?
Think twice. The finish is a plain black alloy steel, not a plated or coated corrosion-resistant finish, so it is intended for dry interior service: electrical, plumbing, heating and air conditioning work inside the building. For damp, exterior, or washdown locations, specify a zinc plated or stainless socket head cap screw in the same 5/16-18 x 7/8 size instead.
6) How do these Metallics socket head cap screws come packaged, and is there a minimum order?
They ship in a jar of 100. Order minimum is one jar, so 100 pieces is the smallest quantity of the JSHC51678. Shipping weight of the jar is 2.32 lbs.
7) What spec do these socket head cap screws conform to for submittal?
Dimensionally they are built to ASME B18.3-2012, the standard for socket cap, shoulder and set screws in inch series. Head dimensions, socket size and thread form all follow that standard, so the 5/16-18 x 7/8 screw drops into any detail calling out a B18.3 socket head cap screw.
How fast can I get the Metallics JSHC51678 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 JSHC51678 come with a warranty?
Absolutely. The Metallics JSHC51678 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 JSHC51678?
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 JSHC51678 from ZenSupply?
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