Guardrail Bolts (Kits) M20×50 10.9 Alloy Steel

Specifications

Standard: GB/T 15831-2023
SKU: GB-000002
Nominal Diameter: M20
Length: 50 mm
Material: Alloy Steel
Grade: 10.9
Finish: Plain
Thread Pitch: 2.5
Unit Weight: 170 g/pc Geometry-based estimate, not an inspection weight, for quotation and freight planning
Type: Standard Part

Unit weight is a geometric estimate (base metal, coating excluded; HDG ≈ +4.5%); trade settlement by actual weight.

Quantity (pcs)Request a Quote

Need another spec? Request a quote with your parameters →

Standard Basis

GB/T 15831-2023

This family is confirmed by spec and drawing, without forcing one standard family.

Spec Range

M20 × 50mm · 同族 18 个规格

This SKU is sourced per order; other lengths/materials in this family below.

Material & Grade

Alloy Steel · 10.9

Quenched & tempered alloy steel, Rm≥1040 MPa, heavy-duty joints

Surface & Finish

Plain

Plain / no coating: indoor dry environments

Where It Fits

Heavy-Duty / Structural

10.9 quenched & tempered, equipment erection, structural joints, vibration duty

Custom to Drawing

Lengths/materials/grades not listed can be manufactured to drawing or standard

FAQ

MOQ and lead time?

Sourced per order or made to drawing. MOQ and lead time are confirmed at quote time by quantity, material and finish. Other sizes in this family are listed above; unlisted specs can be sourced to your drawing.

Can material or grade be substituted?

Current grade: Quenched & tempered alloy steel, Rm≥1040 MPa, heavy-duty joints. Swapping grade/material changes strength and corrosion resistance (e.g. 8.8→10.9 raises strength, 304→316 raises chloride resistance), re-check design load and environment before substitution.

How do I choose the finish?

Plain / no coating: indoor dry environments. Other finishes (HDG, Dacromet, electro zinc) can be quoted on the same size.

Other Sizes in this Family

18 sizes total · current M20×50

M20 7 sizesOpen ▾

M20×50

Alloy Steel · 10.9 · Plain