Type

Hex Bolt

Designation

ST5.5 × 1.8 – 50

Head

Hex · Ø11 × 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

30.00/50 mm · P1.8 · ST sheet-metal (ISO 1478) · plain shoulder 9.9 mm

Major Ø (as built)

5.30 mm

Point

Drill Point (JT) · 10.12 mm

Drill section

Ø4.40 × 8.8 mm · 118°

Drill point rating

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

Head seal

Bonded Sealing Washer · EPDM Rubber · Ø16 × 2 mm

Service class

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

Est. install torque

≈ 3.9 N·m (indicative — verify by test)

Est. pull-out

≈ 3.6 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 · Side-lap stitching.