Carriage, Square-Neck & Nib Bolts

Small Round Head Short Square Neck Bolts

GB/T 801-2021 (reference only)

Nominal size d

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GB/T 801-2021 dimension drawing

Dimensions in mm

Standard	Standard body

		Steel	Stainless steel
General technical requirements		GB/T 16938
Thread	Tolerances	6ga
Thread	Standard	GB/T 193, GB/T 9145
Mechanical properties	Class	Property classes 4.8, 8.8 and 10.9	A2-50, A2-70, A4-70, A4-50
Mechanical properties	Standard	GB/T 3098.1	GB/T 3098.6
Tolerances	Product grade	Product grade B applies except as specified in Clause 4.
Tolerances	Standard	GB/T 3103.1
Surface treatment		No treatment (uncoated and unplated) ; Electroplating requirements in accordance with GB/T 5267.1; Non-electrolytically applied zinc flake coating requirements in accordance with GB/T 5267.2; Hot-dip galvanizing requirements in accordance with GB/T 5267.3	Simple treatment (cleaning and polishing) ; Passivation b
Surface treatment		Any other technical requirements or surface treatments shall be agreed between the purchaser and supplier.
Surface discontinuities		GB/T 5779.1
Acceptance inspection and packaging		GB/T 90.1, GB/T 90.2
		a Depending on the coating system selected, a different tolerance position may be required before coating. See GB/T 5267.1, GB/T 5267.2, GB/T 5267.3; b GB/T 5267.4 specifies passivation methods

A cup head bolt with a small head and a short square neck. Confirm both dimensions.

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