(M3.5) is one of the standard coarse-thread sizes for hex head bolts with reduced shank under ISO 4015. The sections below reproduce the dimensional row, list the matching tools and hole sizes, and summarize where this size is normally specified.
(M3.5) Dimensional Row (ISO 4015)
| Size | Pitch P (mm) | b1 (mm) | b2 (mm) | c_max (mm) | d_a_max (mm) | d_s (mm) | d_w_min (mm) | Width across corners e (mm) | Head height k (mm) | k_max (mm) | k_min (mm) | k_w_min (mm) | r_min (mm) | Width across flats s (mm) | s_min (mm) | x_max (mm) | Length range l (mm) | Reference standard |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (M3.5) | 0.6 | 13 | 0 | 0.4 | 4.1 | 3.05 | 5.22 | 6.44 | 2.4 | 2.6 | 2.2 | 1.54 | 0.1 | 6 | 5.7 | 1.5 | 20~35 | ISO 4015 |
Spanner & Drive for (M3.5) Hex Head Bolts with Reduced Shank
(M3.5) Hex Head Bolts with Reduced Shank have a width across flats of 6 mm — fit a 6 mm open-ended spanner or socket. Prefer a 6-point socket over a 12-point: it loads the corners of the 6 mm hex far less, which matters on plated heads and on anything that will be re-used. Set preload with a torque wrench rather than by arm.
(M3.5) Hex Head Bolts with Reduced Shank Weight
A steel (M3.5) hex head bolts with reduced shank at the listed 2,035 mm length weighs approximately 154 g each — about 154 kg per 1,000 pieces. Stainless A2/A4 weighs roughly the same (density 7.9–8.0 g/cm³).
Actual weight varies slightly with head form, thread and finish; use this figure for freight estimation only.
Installation Tips for (M3.5) Hex Head Bolts with Reduced Shank
- Use a 6-point socket where access allows — 12-point sockets are more prone to rounding the corners on smaller sizes.
- A flanged head is its own washer. Adding a flat one under it lifts the serrations clear of the surface they are meant to bite, which is the whole locking mechanism gone.
- At (M3.5) the joint is sensitive to over-torque — use a torque-limiting driver and check the head doesn't bury into a softer counterpart.
Mating Parts for (M3.5)
For (M3.5), pair with a (M3.5) hex nut (ISO 4032 / DIN 934) and, where used, a (M3.5) flat washer (ISO 7089 / DIN 125A) under the head and under the nut.
Custom manufacturing · Made to drawing
Need hex head bolts with reduced shank in a size this table does not list?
This page covers (M3.5) hex head bolts with reduced shank. Thread size and pitch, length, property class, drive form, head geometry and head marking are all specifiable — the standard part is where it starts, not where it stops. Made by cold heading or hot forging.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
