Type

Hex Bolt

Designation

ST4.8 × 1.8 – 25

Head

Hex · Ø10 × 4.5 mm

Drive

Hex Socket · 8 mm key

Recess depth

2.79 mm · auto · gauge limits t 2.25–3.38 mm · ISO 4762

Thread

16.17/25 mm · P1.8 · ST sheet-metal (ISO 1478) · fully threaded

Major Ø (as built)

4.60 mm

Point

Drill Point (JT) · 8.83 mm

Drill section

Ø3.84 × 7.7 mm · 118°

Drill point rating

Point #3 · capacity ≤ 3 mm steel · stack 2 mm

Head seal

Bonded Sealing Washer · EPDM Rubber · Ø14 × 2 mm

Flange washer

Z14 Galvanized Steel · Ø14 × 1 mm

Coating

RAL 3009 Oxide Red · matt · min. 60 µm

Service class

C3 · Outdoor urban · coating under-rated — use dip-spin ceramic coating

Est. install torque

≈ 3.4 N·m (indicative — verify by test)

Est. pull-out

≈ 3.1 kN from 2 mm steel sheet (indicative)

Manufacturing mode

FDM 3D print · +0.2 mm thread offset

Notes

ETA-16/0443 · 330046-01-0602 · SW-8 · SQ Ceramic + RAL ≥ 60 µm.