Is the calculated mass an ISO table value?

No. ISO 4014 and ISO 4017 specify product characteristics, not a universal finished-piece mass. The result is a transparent geometric estimate using an ideal hexagonal head, nominal shank, pitch-diameter cylinder for the threaded length and the entered density.

Why can catalogue mass differ?

Finished mass depends on dimensional tolerances, head chamfers, bearing face, underhead fillet, thread runout and root form, material grade, coating and manufacturer process. Use supplier mass for purchasing or logistics.

Are DIN 931 and ISO 4014 dimensions identical?

No. DIN-pattern and ISO-pattern products can differ, notably in wrench size for some diameters. Confirm the marked product standard instead of treating the designations as an identical table.

Engineering geometry tool

ISO 4014/4017 Bolt Geometry & Mass Estimator

Distinguish partial and full thread, look up basic nominal head dimensions, and estimate mass from a documented idealized geometry and your material density.

ISO 4014:2022ISO 4017:2022Estimate ≠ Catalogue Mass

Nominal geometry and estimate

Idealized mass estimate

Across flats s / head height k

Coarse pitch P / basic pitch diameter d₂

Modelled threaded length

Modelled smooth length

Idealized volume

Current product standards

ISO 4014:2022 covers partially threaded hexagon head bolts and ISO 4017:2022 covers fully threaded hexagon head screws, both in steel and stainless steel with metric coarse-pitch threads M1.6–M64 and product grades A/B. This page is a limited M6–M48 nominal lookup, not a reproduction of all tolerances, preferred lengths or conformity requirements.

ISO 4014 minimum thread-length rule

b = 2d+6 (L≤125); 2d+12 (125<L≤200); 2d+25 (L>200), mm

For the estimate, threaded length is min(b,L). ISO 4017 is modelled as threaded over L. Real products include runout and incomplete thread; verify availability and exact limits in the licensed standard or supplier drawing.

Transparent mass model

V = (√3/2)s²k + (π/4)d²L_smooth + (π/4)d₂²L_thread

d₂ = d − 0.649519P; m[g] = ρ[g/cm³]·V[mm³]/1000

The head is an ideal regular hexagonal prism across flats s. The smooth part is a nominal-diameter cylinder. The threaded part is represented by the basic pitch-diameter cylinder from the ISO metric basic profile. This is an engineering estimate only: chamfers, bearing face, fillets, runout, tolerances, thread-root geometry and coating are omitted.

Basic nominal lookup used

크기	s(mm)	k(mm)	coarse P (mm)
엠6	10	4.0	1.0
엠8	13	5.3	1.25
엠10	16	6.4	1.5
M12	18	7.5	1.75
엠14	21	8.8	2.0
엠16	24	10.0	2.0
엠20	30	12.5	2.5
엠24	36	15.0	3.0
엠30	46	18.7	3.5
엠36	55	22.5	4.0
엠42	65	26.0	4.5
엠48	75	30.0	5.0

These are basic nominal display values. Widths/tolerances depend on the actual product standard and grade; DIN-pattern products must not be assumed identical. A current Fastenal ISO 4014 product specification independently confirms the ISO M10/M12 dimensions and tolerances, while Fabory ISO product records confirm the thread-length branches and show why catalogue mass depends on the exact product.

출처

Fastenal ISO 4014 product standard — M10/M12 dimensional limits.
Fabory M10×160 ISO 4014 product record — b branches, s/k/P and catalogue mass.
ISO 724:2023 및 ISO 68-1:2023 — current metric-thread basic dimensions/profile context.