Common M6 Fastener Screw And Bolt Sizes - MonsterBolts

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M6 screw and bolt sizes are widely used in automotive, machinery, furniture, and DIY. Use this chart to quickly find head height, head diameter, and drive size for popular M6 types. If you’re new to standards, DIN and ISO numbers are the exact identifiers that define official dimensions (e.g., DIN 912, ISO 7380). Standard coarse thread for M6 is M6-1.0.

Common M6 screw head styles and drive types – Monster Bolts
Representative M6 head styles. See table for dimensions & drive sizes.

Metric M6-1.0 (Coarse) – Dimensions & Drive Sizes

Helpful: Need torque or strength guidance? See our Metric Socket Screw Torque Chart.
Type DIN ISO Head Height Head Diameter Drive Size
M6 Hex Bolts (FT) 933 4017 4.15 mm 11.05 mm* 10 mm WAF
M6 Hex Bolts (PT) 931 4014 4.15 mm 11.05 mm* 10 mm WAF
M6 Socket Head Cap 912 4762 6.0 mm 10.22 mm 5 mm hex
M6 Low Head Socket Cap 7984 — 4.0 mm 10.0 mm 4 mm hex
M6 Button Head Socket 9427 7380 3.3 mm 10.5 mm 4 mm hex
M6 Flat Head Socket 7991 10642 3.72 mm 13.44 mm 4 mm hex
M6 Phillips Flat Head 965 — 3.0 mm 11.0 mm #3 Phillips
M6 Phillips Pan Head 7985 7045 4.75 mm 12.0 mm #3 Phillips

All of these pair with matching M6 nuts and M6 washers.

Legend: PT = Partial Thread, FT = Full Thread. * = Width Across Flats (hex).

Related tools & references:
  • Metric Thread Pitch Table  •  US TPI (comparison)
  • How to Measure Length & Diameter  •  Printable Ruler (to scale)
  • Shop all M6 fasteners — fast shipping from Milton, Florida.
Explore other metric sizes: ← Previous M5 Next → M8

M6 FAQs

What hex key fits an M6 socket head cap screw?

Typically a 5 mm hex key. Low-head and button socket styles commonly use a 4 mm hex.

What nut fits an M6 screw?

M6 screws pair with M6 nuts and M6 washers. Metric fasteners always match by nominal diameter.

What is the standard M6 thread pitch?

Standard coarse pitch is M6-1.0. Fine pitches such as M6-0.75 or M6-0.5 exist—verify your tapped hole or nut before ordering.

Is an M6 the same as 1/4-20?

No. While sizes are close, M6-1.0 (metric) and 1/4-20 (imperial) use different thread systems and are not interchangeable.

What tap drill size is used for M6-1.0?

A common tap drill for M6-1.0 is 5.0 mm. Always confirm for your material and application.

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