Carriage, Square-Neck & Nib Bolts

Countersunk Head Nib Bolts

GB/T 11-2013 (reference only)

Nominal size d

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GB/T 11-2013 dimension drawing

Dimensions in mm

Specification parameters

Equivalent standards

Standard	Standard body

Technical conditions and referenced standards

		Steel
General technical requirements		GB/T 16938
Thread	Tolerances	8g
Thread	Standard	GB/T 196, GB/T 197
Mechanical properties	Class	Property classes 4.6 and 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

Product overview

A flat countersunk head with a nib to engage the mating recess. Confirm the head seating and nib dimensions. If hot forging is required, state it with the material and size in your enquiry so the production method can be confirmed.

For a quote, share the required dimensions, finish and quantity.