
ASME B18.2.1 · Grade 8
UNC Hexagon Head Bolt Grade 8 Black Zinc 35CrMo Steel Fine-Strength Hex Bolt for Machinery
- Material
- 35CrMo Alloy Steel
- Thread series
- UNC
- Finish
- Black Zinc
High-strength alloy steel fasteners in 35CrMo and 40CrMo: socket head cap screws to Grade 12.9, button and flat head screws to Grade 10.9, hex bolts to Grade 8, and ASTM A193 B7 threaded rods and stud bolts. Finishes include black oxide, zinc plated, yellow zinc, black zinc and Dacromet. The range targets machinery, automotive and structural joints where carbon steel grades are insufficient.

ASME B18.2.1 · Grade 8

ASME B18.3 · Grade 10.9

Grade 8

ASME B18.2.1 · Grade 8

ASME B18.2.1 · Grade 8

ASME B18.2.1 · ASTM A193 B7

ASME B18.2.1 · ASTM A193 B7

ASME B18.2.1 · ASTM A193 B7

ASME B18.2.1 · Grade 8

ASME B18.2.1 · Grade 8

ASME B18.2.1 · Grade 8

Grade 12.9

DIN 912 · Grade 10.9

ASTM A193 · Grade 8.8

ASTM A193 · Grade 8.8

ASTM A193 · ASTM A193 B7

Grade 12.9

Grade 12.9

Grade 12.9

DIN 912 · Grade 12.9

Grade 12.9

ASTM A193 B7

Grade 12.9

ASME B18.3 · Grade 12.9
Showing 1–24 of 79 products
Buying Guide
Share the standard, thread size, length, material, grade, finish and quantity. For non-standard parts, a drawing or sample helps us confirm production details faster.
Yes. We manufacture to drawing and to sample. Send your specification through the RFQ form and we will confirm feasibility, MOQ and lead time.
Material test certificates, dimensional inspection reports and coating reports are available on request, depending on the material and finish of your order.
MOQ depends on size, material and finish — standard catalog sizes start lower, and custom parts are quoted per drawing. Samples are available for most standard items; mention sampling when you send the RFQ and we will confirm.
Lead time is confirmed per order with your quotation. Coated and custom parts need additional production and surface-treatment time. Share your target delivery date in the RFQ and we will confirm whether we can meet it before you commit.
Drawing-led manufacturing
We manufacture standard and custom fasteners to order. Tell us the size, material, grade, finish and quantity — or send your drawing — and we will confirm MOQ and lead time.