Technical Specifications

DIN 7991 / ISO 10642 / GB/T 70.3 / ASME B18.3 Hex Socket Countersunk Head Screws 8.8, 10.9, 12.9 / A2-70, A4-70 Plain, Black Oxide, Zinc Plated, HDG, Geomet
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DIN 7991 / ISO 10642 / GB/T 70.3 / ASME B18.3 Hex Socket Countersunk Head Screws 8.8, 10.9, 12.9 / A2-70, A4-70 Plain, Black Oxide, Zinc Plated, HDG, Geomet
DIN 7991 / ISO 10642 / GB/T 70.3 / ASME B18.3 Hex Socket Countersunk Head Screws 8.8, 10.9, 12.9 / A2-70, A4-70 Plain, Black Oxide, Zinc Plated, HDG, Geomet
DIN 7991 / ISO 10642 / GB/T 70.3 / ASME B18.3 Hex Socket Countersunk Head Screws 8.8, 10.9, 12.9 / A2-70, A4-70 Plain, Black Oxide, Zinc Plated, HDG, Geomet

Standard

DIN 7991 / ISO 10642 / GB/T 70.3 / ASME B18.3

Specification

M3 - M24

Material

Carbon Steel / Stainless Steel (A2,A4)

Property Class

8.8, 10.9, 12.9 / A2-70, A4-70

Finish

Plain, Black Oxide, Zinc Plated, HDG, Geomet

Product Description

Fully threaded or partially threaded as per requirement

Technical Details

Engineering Drawing

dk k d b s 90°

Dimensions Table

dpdk (max)k (max)s (Nominal)b (Ref.)
M30.56.01.72.012
M40.78.02.32.514
M50.810.02.83.016
M61.012.03.34.018
M81.2516.04.45.022
M101.520.05.56.026
M121.7524.06.58.030


Packaging & Delivery

  • Inner Packaging

Small box packaging (100-1000 pcs/box) or bulk plastic bags.

  • Outer Packaging

Standard export cartons (approx. 20-25kg/carton).

  • Palletization

Fumigation-free wooden pallets with stretch film wrapping.

  • Logistics Services

Supports FOB, CIF, DDP; Shanghai/Ningbo ports .

Quality & Certificates

  • Quality Inspection

100% thread Go/No-go gauge testing.

Tensile strength and hardness testing for high-grade bolts.

Salt spray test for corrosion resistance evaluation.

  • Certifications

ISO 9001:2015 Quality Management System.

MTR (Mill Test Report) provided for every batch.

CE / RoHS / SGS compliance available upon request.