Hex Cap Screw ASME B18.2.1, SAE J429 Gr.5

American-standard hex cap screws to ASME B18.2.1 in medium-carbon steel, quenched and tempered to SAE J429 Grade 5. UNC coarse thread from 1/4-20 to 1-1/2-6, yellow zinc trivalent finish; UNF fine thread and hot-dip galvanized per ASTM A153 on request.

Standard	ASME B18.2.1 / SAE J429 Gr.5
Size	1/4-20 – 1-1/2-6 UNC × 3/4″–10″
Thread	UNC (2A), UNF on request
Finish	Yellow zinc, Zn clear, HDG A153
Packing	25 lb carton / bulk box OEM

• Quenched-and-tempered medium carbon steel — 120 ksi min tensile (1/4″–1″), 105 ksi (over 1″)
• Three-line head marking for instant grade identification
• Dimensions gauge-checked against ASME B18.2.1 tables

MOQ & lead time depend on size and finish — typical batch 15–30 days after confirmation. Mill test certificate 3.1 available on request.