Metallics JSHC81SS 8-32 x 1 in. Socket Head Hex Cap Screws - 18-8 Stainless - Each

Yes. The Metallics JSHC81SS is cut 8-32 UNC, 32 threads per inch, so it mates with any standard #8-32 coarse tapped hole, nut, or insert. Overall screw length is 1 inch, so your tapped depth plus the material you are clamping needs to total about that for full thread engagement.

Head diameter runs 0.262 to 0.270 in. and head height 0.159 to 0.164 in. on the JSHC81SS, built to ASME B18.3-2012, so it drops into any counterbore machined to the B18.3 dimensions for a #8 socket head cap screw. If you are seating it flush, plan the counterbore around 0.164 in. deep plus clearance.

18-8 stainless is the material, which is the common austenitic grade used for general corrosion resistance in wet and outdoor service. For salt spray or coastal marine exposure, 316 stainless is the step up. These are catalogued for electrical work, so enclosure, strut, and panel fastening is the usual use.

The JSHC81SS is rated 80,000 psi minimum tensile and 30,000 psi minimum yield, with hardness at Rockwell B80. That is well below a black alloy steel socket head cap screw, which is heat treated to roughly 180,000 psi. You trade clamp load for corrosion resistance. Elongation is 10 percent minimum and reduction of area 33 percent minimum, so the stainless is ductile rather than brittle, and it holds its mechanical properties above ambient temperature.

Hex drive, socket head, so it takes an Allen key or hex bit rather than a screwdriver. The cylindrical socket head is why it fits in counterbores and tight channels where a hex bolt head will not clear a wrench.

They ship in a jar of 100, which is the order minimum (100 count). Jar weight is listed at 0.71 lbs. Other sizes and quantities are available by request.

Metallics lists the JSHC81SS as compliant for both Buy American and ARRA. Country of origin is multiple, so if your contract requires a specific origin on the certification, get the mill paperwork tied to the lot you receive.

Yes. Cap screws of length 3D or greater, where D is the nominal diameter, are subject to tensile strength, yield strength, elongation and reduction of area testing. A #8 is about 0.164 in. nominal, so 3D is roughly half an inch, and a 1 inch screw clears that easily. The elongation figure applies to machined specimens at least 4D long.