Metallics JSBH412D Bolts 1/4-20 x 3 HXBT SS (Jar 100)

It's a 1/4-20 hex bolt, 3 inches long. The thread is 20 threads per inch (standard UNC for 1/4 inch), and the shank measures 0.2450 to 0.2500 inch outside diameter, so it drops through a standard 1/4 inch clearance hole and takes any 1/4-20 nut or tapped hole.

18-8 austenitic stainless is made for general atmospheric corrosion resistance, which covers outdoor mounting, damp mechanical rooms, and food or chemical processing equipment. Aggressive chemical exposure or salt/chloride service is where 18-8 falls short; for that you want 316 stainless instead, which Metallics also makes in this cap screw line.

No on both counts. The JSBH412D is flagged not ARRA compliant and not Buy American compliant, even though country of origin is listed as the United States. If your contract carries a domestic-preference clause, confirm with your specifier before using these.

Head width across flats is 0.428 to 0.438 inch, which is a 7/16 inch wrench or socket. Across the corners the head runs 0.488 to 0.505 inch, worth knowing if you're setting these in a counterbore or tight against a flange.

Tensile is 100,000 to 150,000 psi minimum with 65,000 psi minimum yield, and hardness runs Rockwell B95 to C32. That puts it in the same tensile neighborhood as a Grade 5 steel bolt but with a lower yield point, so for high-torque structural clamping a plated alloy bolt is the better choice. Pick the stainless where corrosion, not peak clamp load, is the deciding factor.

They ship 100 pieces in a jar, and 100 count is the order minimum, so one jar is the smallest buy. Metallics runs this as the JSBHC jar-packed line within the SBHC and JSBHC cap screw series; other lengths and pack quantities are available by request.

No. The JSBH412D jar is 100 hex bolts only, 1/4-20 x 3 inch. Order 1/4-20 stainless hex nuts and flat or lock washers separately, and match them in 18-8 stainless so you aren't mixing metals in a damp location.