You may also like
Bolts 5/16-18 X 1-1/4 Hx Sl Ms St-zn (Jar 100)
Additional Notes
- Other sizes and quantities available by request
Manufacturer Resources
Product Specs
- Arra Compliant:
- C
- Buy American Compliant:
- C
- Dimensional Standard:
- ASME B18.6.3-2002
- Division:
- Electrical H1
- Drive Type:
- Slotted
- Fastener Head Type:
- Hex
- Fastener Head Width:
- 0.489 - 0.500 in.
- Fastener Height:
- 0.208 - 0.230
- Fastener Length:
- 1/1/04
- Fastener Width:
- 0.545
- Language Code:
- EN
- Neurspe:
- https://ideadigitalasset.com/DAMRoot/Original/10035/11237_ID-SPE-v1-ID-SPE-v1-Hex_Head_Slotted_Machine_Screw_St-Zn.pdf
- Order Minimum Imperial:
- 100
- Order Minimum Uom Imperial:
- CT
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 4.57 in
- Product Length:
- 3 in
- Product Weight:
- 1315 g
- Product Width:
- 76.2 MM
- Remarks:
- The catalog UPC differ from the tarnsaction daat spreadsheet UPC
- Sub Division:
- Electrical-E H2
- Thread Per Inch:
- 18
- Thread Pitch:
- 0.312
- Thread Standard:
- ANSI/ASME B1.1
- Thread Type:
- UNC
- Washer Od:
- 0.624 - 0.676 in.
- Department:
- Electrical
- Product Subgroup:
- Bolts
- Product Type:
- Hexagonal Bolt
- Type2:
- Hexagonal Bolt
- Series:
- JHHMS
- Product Finish:
- Zinc
- Product Details:
- Hexagonal Bolt
- Product Material:
- Steel
Metallics JHHMS94 – Frequently Asked Questions
1) What thread does the Metallics JHHMS94 machine screw use, and will it take a standard 5/16-18 nut?
It's a 5/16-18 UNC thread, 18 threads per inch, made to ANSI/ASME B1.1. Any standard 5/16-18 coarse nut or tapped 5/16-18 hole will take it, which covers most strut nuts, box hardware and enclosure taps in that size.
2) Are these Metallics hex machine screws Buy American and ARRA compliant for a government job?
Both the Buy American and ARRA compliance flags on the JHHMS94 are marked compliant. Country of origin is listed as China, so if your contract requires domestic melt and manufacture rather than trade-agreement compliance, verify against your own contract clause before you spec it.
3) What size wrench or socket fits the hex head on the Metallics JHHMS94?
Head width across flats measures 0.489 to 0.500 inch, so a 1/2 inch wrench or socket is the fit. Head height runs 0.208 to 0.230 inch. It's also slotted, so you can drive it with a flat blade screwdriver when a wrench won't reach.
4) Can I use these hex slotted machine screws outdoors or in damp locations?
These are zinc plated steel, not stainless. Zinc plating handles indoor and normally dry conditions fine, and it's what you'd expect in panels, enclosures, fixture mounting and general electrical work. For wet, coastal or corrosive environments, specify a stainless machine screw in the same 5/16-18 size instead.
5) How many Metallics JHHMS94 screws come in a jar and is there an order minimum?
They come packaged in a jar of 100, and 100 count is the order minimum. Other sizes and quantities can be supplied by request.
6) What spec do these Metallics slotted hex head machine screws conform to?
Dimensionally they're built to ASME B18.6.3-2002, the standard covering machine screws and machine screw nuts, with threads to ANSI/ASME B1.1. If a drawing calls out B18.6.3 hex head slotted machine screws in 5/16-18, these answer it.
7) Is the Metallics JHHMS94 a bolt or a machine screw, and does it need a tapped hole?
It's a hex head slotted machine screw in 5/16-18, catalogued as a hex bolt type. Machine screws like this are meant for a tapped hole or a nut, not for driving into wood or unthreaded material. Thread runs the full working length, so either a nut on the back side or a threaded hole in the chassis works.
8) What washer size suits these 5/16-18 hex slotted machine screws?
A washer with an outside diameter in the 0.624 to 0.676 inch range matches the bearing surface of this screw's head. That's the figure to work to if you're pairing them with flat washers in a panel or enclosure build.
How fast can I get the Metallics JHHMS94 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 JHHMS94 come with a warranty?
Absolutely. The Metallics JHHMS94 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 JHHMS94?
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 JHHMS94 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.