ISO 7379 M20×55 Socket Head Shoulder Screw2 combinations of material, property class and finish supplied in this size.

Standard
ISO 7379 · 1983
Thread
M20 · pitch 2.5 mm
Length under head
55 mm
Clearance / tap drill
21 / 22 / 24 mm · 17.5 mm
Weight
126.14 kg per 1 000 pieces · Theoretical, from nominal geometry — confirm before ordering7.9 pieces per kg
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ISO 7379 dimension tablePDF · every size

Order M20×55

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MaterialClassFinishQuantityNet weight
Alloy Steel12.9Blackened
Alloy Steel12.9Plain

Dimensions at M20×55

DimensionValue
P2.5 mm
Weight126.14 kg / 1000 pcs
Pieces per kg7.9

Plating adds thickness — state the finish on the order.

Holes for this thread

ISO 273 · ISO 2306
HoleDiameter
Clearance hole21 / 22 / 24 mm
Tap drill17.5 mm

Other lengths in M20

All sizes →
Sizekg per 1 000 pieces
M20×50114.68open
M20×55126.14this page
M20×60137.61open
M20×65149.08open
M20×70160.55open

M20 x 50M20 x 60M20 x 65M20 x 70M20 x 80M20 x 90M20 x 100

Parts that mate with M20

matched by thread and pitch

Quote ISO 7379 M20×55 Socket Head Shoulder Screw

Standard, size, material, finish, quantity and destination are enough to begin.