Metallics JSBH178 Bolts 10-32 X 7/8 Hxbt SS (Jar 100)

It's a 10-32 machine screw thread with a 7/8 inch length and a hex head. The 32 threads per inch is the UNF fine thread for a #10 diameter, so it mates with 10-32 tapped holes and 10-32 nuts. Head type is hex, driven with a wrench or socket rather than a screwdriver.

They're 18-8 stainless, an austenitic alloy used where general atmospheric corrosion resistance is needed, including chemical and food-processing equipment. That covers normal outdoor and damp indoor service. Aggressive chemical exposure, chlorides or marine salt spray is where 18-8 falls short and 316 stainless is the better call.

The JSBH178 is flagged compliant for both Buy American and ARRA. Country of origin is listed as multiple, so for a federally funded job where the contracting officer wants origin documented per lot, request the certification with the shipment.

Tensile strength runs 85,000 to 140,000 psi minimum with 45,000 psi minimum yield, and hardness is Rockwell B80 to C32. That puts it in the range of a standard low-to-medium carbon steel fastener, not a hardened Grade 5 or Grade 8 bolt. For structural or high-preload joints, use a graded alloy bolt; use these where corrosion resistance is the governing requirement.

Each jar holds 100 pieces, and 100 count is the order minimum, so one jar is the smallest buy. Jar packaging keeps the small 10-32 hardware together on a cart or in a van bin instead of loose in a bag. Metallics does offer other sizes and quantities on request.

Both are austenitic stainless. The 18-8 in the JSBH178 handles general atmospheric corrosion, including chemical and food-processing equipment service. Move to 316 when the environment is harsher, since the description notes some chemical environments call for special corrosion resistant materials and added precautions. Metallics covers both in the SBHC and JSBHC series.

You can, but keep dissimilar-metal contact in mind: pairing 18-8 stainless against zinc or plain carbon steel in a wet location drives galvanic corrosion of the less noble part. For a run of enclosures or racks, standardize on 18-8 nuts and washers with these bolts rather than mixing finishes.

A full jar comes in at 390 g. Packaged dimensions are listed as 3 in length, 2.15 in height and 76.2 mm (3 in) width, so it's a compact jar that stows in a parts drawer.