1/2-13 x 3 in. Socket Head Hex Cap Screws - Alloy Steel Black - 50qty
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.
- Socket head with Hex Drive
- 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)
- 1/2-13 Diameter, 3" Length
Manufacturer Resources
Product Specs
- Minimum Purchase:
- 50 units
- Arra Compliant:
- N
- Buy American Compliant:
- No
- Dimensional Standard:
- ASME B18.3-2012
- Division:
- Electrical H1
- Drive Type:
- Hex
- Fastener Head Height:
- 0.492 - 0.5 in.
- Fastener Head Type:
- Socket
- Fastener Head Width:
- 0.735 - 0.75 in.
- Fastener Length:
- 3
- Field Application:
- Electrical, Plumbing, Heating and Air Conditioning Industries
- Hardness:
- Rockwell C39
- Hex Size:
- 8-Mar
- 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:
- 50
- Order Minimum Uom Imperial:
- EA
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 7.25 in
- Product Length:
- 4.5 in
- Product Weight:
- 8.82 lbs
- Product Width:
- 4.5 in
- Slot Depth:
- 0.245
- Sub Division:
- Electrical-E H2
- Tensile Strength:
- 180000 psi minimum
- Thread Per Inch:
- 13
- Thread Type:
- UN
- Wall Thickness:
- 0.19
- 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 JSHC7123 – Frequently Asked Questions
1) Will a 1/2-13 socket head cap screw hold more load than a grade 8 hex bolt the same size?
Yes. The Metallics JSHC7123 socket head cap screw is rated 180,000 psi minimum tensile and 162,000 psi minimum yield, which is above equivalent sizes of Grade 5 or Grade 8 hex head cap screws. Because it's internally wrenched with a hex key, it also needs less surface area or counterbore clearance than a hex head of the same diameter, which matters in tight brackets and machined pockets.
2) What counterbore do I need for the 1/2-13 x 3 in. socket head cap screw?
Size the counterbore off the head: the socket head measures 0.735 to 0.75 in. across and 0.492 to 0.5 in. high, so you need a bore wide enough to clear 3/4 in. and at least 1/2 in. deep to bring the head flush. Shallower than that and the head stands proud.
3) Is this 1/2 in. cap screw coarse or fine thread?
Coarse. It's 1/2-13 UN thread, 13 threads per inch, which is the standard coarse pitch for a 1/2 in. fastener. It will not mate with a 1/2-20 fine-thread nut or tapped hole.
4) Do these fasteners meet Buy American or ARRA requirements for a government job?
No. The JSHC7123 socket head cap screw is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. If your contract carries a domestic sourcing clause, this part will not satisfy it.
5) Does the black finish on these alloy steel socket head cap screws give any corrosion protection outdoors?
Treat it as a plain alloy steel fastener. The JSHC7123 is alloy steel with a black finish, which is an oil-type appearance finish, not a plated or galvanic coating, so it is intended for dry indoor and enclosed applications. For wet, exterior, or washdown locations, specify a zinc-plated or stainless socket head screw instead.
6) What standard do these Metallics socket head cap screws conform to?
Dimensionally they are built to ASME B18.3-2012, the standard for socket cap screws and hex keys, so head and thread geometry will match other B18.3 parts and standard counterbore tables. Hardness is Rockwell C39.
7) How many 1/2-13 x 3 in. socket head cap screws come in a jar, and can I buy just one?
They ship in a jar with an order minimum of 50 each, so a single piece isn't an orderable quantity. Other sizes and quantities are available by request.
8) Is a socket head cap screw the right choice for mounting electrical gear and strut, or should I use a hex bolt?
A socket head makes sense when clearance is tight or the head has to sit in a counterbore, since it is driven with a hex key from above rather than needing wrench swing around the head. Metallics lists this screw for the electrical, plumbing, and heating and air conditioning trades. If you have open access and want to run a socket or wrench on it, a hex head cap screw is the faster install.
9) Are these socket head cap screws proof-tested, or just rated by material?
At 3 in. long on a 1/2 in. diameter, this screw exceeds the 3D length threshold, so it falls under tensile strength, yield strength, elongation, and reduction of area testing. Elongation is 10% minimum on machined specimens at least 4D long, and reduction of area is 33% minimum.
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Does the Metallics JSHC7123 come with a warranty?
Absolutely. The Metallics JSHC7123 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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