Structural Heavy Hex Bolts M12×50 10.9S Alloy Steel Black Oxide

Specifications

Standard: GB/T 1228
SKU: HB-001542
Nominal Diameter: M12
Length: 50 mm
Material: Alloy Steel
Grade: 10.9S
Finish: Black Oxide
Thread Pitch: 1.75
Unit Weight: 60 g/pc Geometry-based estimate, not an inspection weight, for quotation and freight planning
Type: Standard Part

Quantity (pcs)

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Standard Basis

GB/T 1228

Common equivalents below; confirm dimensions and drawing before substitution.

Spec Range

M12 × 50mm · 同族 53 个规格

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

Material & Grade

Alloy Steel · 10.9S

Structural-bolting high-strength (GB/T 1228 family), Rm≥1040 MPa

Surface & Finish

Black Oxide

Black oxide: light protection, use with oil or grease

Standard Equivalents

Equivalence is based on published standard-family information (Identical = interchangeable; Equivalent = dimensions/tolerances may differ, verify drawings before substitution).

System	Standard	Equivalence	Note
GB/T	GB/T 1228 Primary	Identical	Primary standard from source content
ISO	ISO 7412	Equivalent	Common commercial equivalent; confirm heavy hex dimensions on order
DIN	DIN 6914	Equivalent	Common commercial equivalent; confirm heavy hex dimensions on order

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Where It Fits

Heavy-Duty / Structural

10.9S 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: Structural-bolting high-strength (GB/T 1228 family), Rm≥1040 MPa. 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?

Black oxide: light protection, use with oil or grease. Other finishes (HDG, Dacromet, electro zinc) can be quoted on the same size.