Carriage, Square-Neck & Nib Bolts

Mushroom Head Nib Bolts

GB/T 15-2013 (reference only)

Nominal size d

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GB/T 15-2013 dimension drawing

Dimensions in mm

Standard	Standard body

		Steel
General technical requirements		GB/T 16938
Thread	Tolerances	8g
Thread	Standard	GB/T 196, GB/T 197
Mechanical properties	Class	Property class 4.8
Mechanical properties	Standard	GB/T 3098.1
Tolerances	Product grade	Product grade C applies except as specified in Clause 3.
Tolerances	Standard	GB/T 3103.1
Surface treatment		No treatment; Electroplating requirements in accordance with GB/T 5267.1; Any other surface treatment shall be agreed between the purchaser and supplier.
Acceptance inspection and packaging		GB/T 90.1, GB/T 90.2

A mushroom head bolt with a nib under the head. Confirm the nib and the mating recess.

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