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- 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.
- Socket head with Hex Drive
- 3/4-10 Diameter, 21/4" Length
- Alloy Steel Black Material
- 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)
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Manufacturer Resources
Product Specs
- Minimum Purchase:
- 25 units
- Arra Compliant:
- N
- Buy American Compliant:
- No
- Dimensional Standard:
- ASME B18.3-2012
- Division:
- Electrical H1
- Drive Type:
- Hex
- Fastener Head Height:
- 0.74 - 0.75 in.
- Fastener Head Type:
- Socket
- Fastener Head Width:
- 1.107 - 1.125 in.
- Fastener Length:
- 2/1/04
- Field Application:
- Electrical, Plumbing, Heating and Air Conditioning Industries
- Hardness:
- Rockwell C39
- Hex Size:
- 8-May
- 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:
- 25
- Order Minimum Uom Imperial:
- EA
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 7.25 in
- Product Length:
- 4.5 in
- Product Weight:
- 3.75 lbs
- Product Width:
- 4.5 in
- Slot Depth:
- 0.37
- Sub Division:
- Electrical-E H2
- Tensile Strength:
- 170000 psi minimum
- Thread Per Inch:
- 10
- Thread Type:
- UN
- Wall Thickness:
- 0.285
- 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 JSHC34214 – Frequently Asked Questions
1) Is the Metallics JSHC34214 socket head cap screw stronger than a Grade 8 hex bolt in the same size?
In 3/4-10, the JSHC34214 alloy steel socket head cap screw is rated 170,000 psi minimum tensile and 162,000 psi minimum yield, which is above what a Grade 8 hex head cap screw delivers in an equivalent size. Because it is internally wrenched with a hex key instead of needing wrench clearance around a hex head, it also takes less surface area or counterbore diameter to drive.
2) What size counterbore do I need for a 3/4-10 socket head cap screw?
Size the counterbore off the head: the JSHC34214 head measures 1.107 to 1.125 in. across and 0.74 to 0.75 in. tall. Allow clearance over 1.125 in. on diameter if you want the head fully recessed, and at least 0.75 in. of depth to bring it flush. Head geometry follows ASME B18.3-2012, so standard socket head counterbore charts apply.
3) Will a 3/4-10 socket head cap screw thread into a standard 3/4 inch coarse tapped hole or nut?
Yes. The thread on the JSHC34214 is 3/4-10 UN with 10 threads per inch, which is the standard 3/4 inch coarse series, so it mates with any 3/4-10 UNC tapped hole, nut, or insert. It will not thread into a 3/4-16 fine-thread hole.
4) Is this socket head cap screw acceptable on a Buy American or ARRA-funded job?
No. The JSHC34214 is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. On a federally funded project carrying domestic-sourcing requirements you will need a fastener specifically certified as domestic.
5) What drive and tool do I need to install these black alloy socket head cap screws?
These are socket head screws with a hex (Allen) drive, so they are turned with a hex key or hex bit socket seated in the recess rather than a wrench on the outside of the head. Nothing is supplied with the screw, so bring the hex key for a 3/4-10 socket head.
6) Are these black cap screws coated for outdoor or wet use?
The JSHC34214 is plain alloy steel with a black finish, not a zinc or hot-dip galvanized corrosion coating. That is fine for dry interior equipment, machinery, and panel work, but for damp, exterior, or washdown locations you should specify a zinc-plated or stainless cap screw instead.
7) How hard are these alloy steel socket head cap screws, and can I cut or drill one on site?
Rated Rockwell C39, which is the hardness that gives the screw its 170,000 psi tensile rating. At that hardness you will not cut, drill, or tap one with ordinary HSS tooling, and heating or welding on it will destroy the heat treat. Order the length you need rather than planning to shorten it.
8) How much does a jar of these 3/4-10 x 2-1/4 cap screws weigh for shipping?
Listed product weight is 3.75 lbs. Useful if you are consolidating a fastener order or watching a parcel weight break on a bulk MRO shipment.
How fast can I get the Metallics JSHC34214 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 JSHC34214 come with a warranty?
Absolutely. The Metallics JSHC34214 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 JSHC34214?
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