ISO 4014Hexagon headExternal hexagon

ISO 4014 M24 × 60 Hexagon head

ISO 4014 M24 × 60 is a hexagon head bolt with a 60 mm nominal length, on a M24 × 2 mm metric thread. ISO version of the partial thread hexagon head bolt. The standard thread length is defined by nominal length bands, so long bolts have a proportionally longer plain shank.

ISO 4014 M24 × 60 — Hexagon headNominal dimensions in mm · Not to scale

Diameter24 mm

Length60 mm

Pitch2 mm

Socket size s36 mm

Head height k15 mm

HeadHexagon head

DriveExternal hexagon

Dimensions

Standard: ISO 4014
Type: Hexagon head bolt
Size: M24 × 60
Thread: M24 × 2
Length L: 60 mm
Socket size s: 36 mm
Head height k: 15 mm
Drive: External hexagon
Head: Hexagon head

Nominal values in millimetres as published in ISO 4014. Estimated weight 213.075 g per piece in steel (214.433 g in stainless), calculated from the nominal geometry — real parts vary with tolerance and head chamfers.

Thread data

Full M24 thread page

DesignationM24 × 2 fine

Pitch2 mm

Nominal Ø24 mm

Pitch Ø22.7 mm

Minor Ø ext21.55 mm

Tap drillØ 22 mm

Other lengthsISO 4014 M24

All M24 specifications

M24 × 50 M24 × 60 M24 × 70 M24 × 80 M24 × 100 M24 × 120 M24 × 140 M24 × 160 M24 × 180 M24 × 200

Interchangeability

ISO 4014 is catalogued with DIN 931 as its equivalent designation. Dimensions are compared field by field rather than assumed identical.

Equivalent standardDIN 931Hexagon Head Bolt — Partial Thread ComparisonISO 4014 vs DIN 931Field-by-field differences and a substitution verdict

Choosing and fitting this size

ISO 4014 M24 × 60 is a hexagon head in M24, 60 mm long under the head, on a 2 mm coarse pitch. Mating threads should be a matching class nut or a tapped hole of the same nominal size.

Common stock grades are 8.8, 10.9 and 12.9 in steel, plus A2-70 and A4-80 in stainless. Class 10.9 and 12.9 carry roughly 1.25 and 1.5 times the proof load of 8.8, but they also need a properly rated mating nut — a class 8 nut under a 12.9 bolt simply moves the failure into the thread. Zinc-plated 10.9 and above should be baked to avoid hydrogen embrittlement.

For a tapped hole, M24 × 2 mm takes a 22 mm tap drill, and the external thread's minor diameter is 21.55 mm — that is the section carrying the load, not the nominal M24 figure. Thread engagement of at least one times the nominal diameter is what lets the bolt fail before the thread strips.