Specification summary of ISO 15072 as applied to fine-thread hex flange bolts, small series: the dimensions the standard controls, the full specified size range, and the equivalent DIN/ISO/ASME designations.
ISO 15072 — Scope
ISO 15072 is "Hexagon bolts with flange with metric fine pitch thread — Small series — Product grade A".
Material, property class, surface finish and packaging are governed by separate documents — ISO 898-1 and ISO 898-2 for mechanical property classes, ISO 4042 for electroplated finishes.
Tolerance & Product Grades
ISO 15072 is written to product grade A; a different grade of the same part is a different document in the family, not a variant of this one.
Dimensions Specified by ISO 15072
| Size | Pitch P (mm) | a_max (mm) | a_min (mm) | b_0 (mm) | b_1 (mm) | b_2 (mm) | b_3 (mm) | c_min (mm) | d_a_max_F (mm) | d_a_max_U (mm) | d_c_max (mm) | d_s_max (mm) | d_s_min (mm) | d_v_max (mm) | d_w_min (mm) | Width across corners e (mm) | Head height k (mm) | k_w_min (mm) | l_f_max (mm) | r_1_min (mm) | r_2_max (mm) | r_3_max (mm) | r_3_min (mm) | r_4_ref (mm) | Width across flats s (mm) | s_min (mm) | v_max (mm) | v_min (mm) | Length range l (mm) | Reference standard |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M8x1 | 1 | 3 | 1 | 35 | 22 | 28 | 0 | 1.2 | 9.2 | 10 | 17 | 8 | 7.78 | 8.8 | 14.9 | 10.95 | 8.5 | 3.8 | 2.1 | 0.4 | 0.5 | 0.36 | 0.16 | 5.7 | 10 | 9.78 | 0.25 | 0.1 | 16~80 | ISO 15072 |
| M10x1 | 1 | 3 | 1 | 40 | 26 | 32 | 0 | 1.5 | 11.2 | 12.5 | 20.8 | 10 | 9.78 | 10.8 | 18.7 | 14.26 | 9.7 | 4.3 | 2.1 | 0.4 | 0.6 | 0.45 | 0.2 | 5.7 | 13 | 12.73 | 0.3 | 0.15 | 20~100 | ISO 15072 |
| M10x1.25 | 1.25 | 3 | 1 | 40 | 26 | 32 | 0 | 1.5 | 11.2 | 12.5 | 20.8 | 10 | 9.78 | 10.8 | 18.7 | 14.26 | 9.7 | 4.3 | 2.1 | 0.4 | 0.6 | 0.45 | 0.2 | 5.7 | 13 | 12.73 | 0.3 | 0.15 | 20~100 | ISO 15072 |
| M12x1.25 | 1.25 | 4.5 | 1.5 | 45 | 30 | 36 | 0 | 1.8 | 13.7 | 15.2 | 24.7 | 12 | 11.73 | 12.8 | 22.5 | 16.5 | 12.1 | 5.4 | 2.1 | 0.6 | 0.7 | 0.54 | 0.24 | 5.7 | 15 | 14.73 | 0.35 | 0.15 | 25~120 | ISO 15072 |
| M12x1.5 | 1.5 | 4.5 | 1.5 | 45 | 30 | 36 | 0 | 1.8 | 13.7 | 15.2 | 24.7 | 12 | 11.73 | 12.8 | 22.5 | 16.5 | 12.1 | 5.4 | 2.1 | 0.6 | 0.7 | 0.54 | 0.24 | 5.7 | 15 | 14.73 | 0.35 | 0.15 | 25~120 | ISO 15072 |
| (M14x1.5) | 1.5 | 4.5 | 1.5 | 50 | 34 | 40 | 0 | 2.1 | 15.7 | 17.7 | 28.6 | 14 | 13.73 | 14.8 | 26.4 | 19.86 | 12.9 | 5.6 | 2.1 | 0.6 | 0.9 | 0.63 | 0.28 | 5.7 | 18 | 17.73 | 0.45 | 0.2 | 30~140 | ISO 15072 |
| M16x1.5 | 1.5 | 4.5 | 1.5 | 55 | 38 | 44 | 57 | 2.4 | 17.7 | 20.5 | 32.8 | 16 | 15.73 | 17.2 | 30.6 | 23.15 | 15.2 | 6.8 | 3.2 | 0.6 | 1 | 0.72 | 0.32 | 8.8 | 21 | 20.67 | 0.5 | 0.25 | 35~160 | ISO 15072 |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Fine-Thread Hex Flange Bolts, Small Series page.
Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
When to Specify ISO 15072
Choose ISO 15072 for international engineering work and OEM supply where ISO standards are the contractual reference. It is the default modern specification for fine-thread hex flange bolts, small series.
Custom manufacturing · Made to drawing
Need a bolt to this standard in a non-standard size?
Parts built to ISO 15072 are already in the catalog, so a special is usually a variation on existing tooling rather than a new design — which is what keeps the cost down. Made by cold heading or hot forging.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
