Socket Head Screws

Hexalobular Socket Head Cap Screws

GB/T 2671.2-2017 (reference only)

Nominal size d

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GB/T 2671.2-2017 dimension drawing

Dimensions in mm

Specification parameters

Equivalent standards

Standard	Standard body

Technical conditions and referenced standards

		Steel	Stainless steel	Non-ferrous metals
General technical requirements		GB/T 16938
Threads	Tolerances	Property class 12.9/ 12.9 : 5g6g; Other property classes: 6g
Threads	Standard	GB/T 193、GB/T 9145
Mechanical properties	Property class	d < 3 mm: by agreement ; / 12.9	、A2-70b	d < 3 mm: by agreement ; d≥3mm:CU2、CU3
Mechanical properties	Standard	d < 3 mm: by agreement ; GB/T 3098.1a	GB/T 3098.6	d < 3 mm: by agreement ; d≥3mm:GB/T 3098.10
Tolerances	Product grade	A
Tolerances	Standard	GB/T 3103.1
Internal hexalobular drive		GB/T 6188
Surface treatment		Untreated ; Electroplating requirements in accordance with GB/T 5267.1; Non-electrolytically applied zinc flake coating requirements in accordance with GB/T 5267.2	Simple treatment ; Passivation requirements in accordance with GB/T 5267.4	Simple treatment ; Electroplating requirements in accordance with GB/T 5267.1
Surface treatment		Any other technical requirements or surface treatments shall be agreed between supplier and purchaser.
Surface discontinuities		GB/T 5779.1; Property class 12.9/12.9 In accordance with GB/T 5779.3	–
Acceptance inspection and packaging		GB/T 90.1、GB/T 90.2
		a For screws unsuitable for tensile testing, hardness shall be tested on a cross-section of the screw. b Stainless steel screws machined from bar may use A1-70 for sizes ≤ M12 and A1-50 for sizes > M12. The property class shall be marked on the screws.

Product overview

Hexalobular Socket Head Cap Screws to GB/T 2671.2-2017. For a quotation, specify the nominal size, any applicable length or thread pitch, material or property class, finish and quantity.