Engineering Tools

Fastener
Calculators

Weight estimation, shaft & hole tolerances, and hardness conversion — all in one place for superalloy fastener engineers.

Fastener Weight

Weight Calculator

Fastener Type

Material

Nominal Diameter (mm)

Length (mm) — bolts & studs only

Quantity

Approximate values for estimation purposes. Actual weight may vary by ±5% depending on tolerances and thread type.

ISO 286-2:2010

Shaft & Hole Tolerances

Nominal Diameter (mm)

Type

Tolerance Class

Based on ISO 286-2:2010 standard tolerance grades. Values are for guidance — verify with reference tables for precision applications.

ASTM E140

Steel Hardness Conversion

Enter a value in any one field and click Calculate to find equivalent values.

Brinell HB

Rockwell C — HRC

Rockwell B — HRB

Vickers HV

Reference Table

Brinell HB	Rockwell C HRC	Rockwell B HRB	Vickers HV	Tensile N/mm²

Approximate conversions per ASTM E140. Values vary by material composition and heat treatment.

Material Reference

Alloy Densities

Density values (g/cm³) used in weight calculations

Steel

8.00

g/cm³

Inconel 718

8.44

g/cm³

Inconel 625

8.44

g/cm³

Inconel 600

8.89

g/cm³

Hastelloy C276

8.89

g/cm³

Hastelloy C22

8.69

g/cm³

Monel 400

8.83

g/cm³

Monel K500

8.44

g/cm³

Titanium Gr 5

4.43

g/cm³

Titanium Gr 2

4.51

g/cm³

Duplex 2205

7.80

g/cm³

Super Duplex 2507

7.80

g/cm³

Alloy 20

8.06

g/cm³

Alloy 660 / A286

7.94

g/cm³

FastenerCalculators

Weight Calculator

Shaft & Hole Tolerances

Steel Hardness Conversion

Alloy Densities

Need an Exact Quote?

Fastener
Calculators