Slotted & Cross Recessed Machine Screws

Cross Recessed Countersunk Machine Screws

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Standard / drawing type Nominal size d

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Equivalent standards

Standard	Standard body

		Steel
General technical requirements		GB/T 16938
Thread	Tolerances	6g
Thread	Standard	GB/T 193, GB/T 9145
Mechanical properties	Property class	d < 3 mm: by agreement ; d ≥ 3 mm: property class 4.8
Mechanical properties	Standard	d < 3 mm: by agreement ; d≥3mm:GB/T 3098.1
Tolerances	Product grade	A
Tolerances	Standard	GB/T 3103.1
Cross recess		GB/T 944.1
Surface discontinuities		GB/T 5779.1
Surface treatment		No treatment ; Electroplating requirements in accordance with GB/T 5267.1; Any other technical requirements or surface treatments shall be agreed between the purchaser and supplier.
Acceptance inspection and packaging		GB/T 90.1, GB/T 90.2

		Steel
General technical requirements		GB/T 16938
Thread	Tolerances	6g
Thread	Standard	GB/T 193, GB/T 9145
Mechanical properties	Property class	d < 3 mm: by agreement ; d ≥ 3 mm: property class 4.8
Mechanical properties	Standard	d < 3 mm: by agreement ; d≥3mm:GB/T 3098.1
Tolerances	Product grade	A
Tolerances	Standard	GB/T 3103.1
Cross recess		GB/T 944.1
Surface discontinuities		GB/T 5779.1
Surface treatment		No treatment ; Electroplating requirements in accordance with GB/T 5267.1; Any other technical requirements or surface treatments shall be agreed between the purchaser and supplier.
Acceptance inspection and packaging		GB/T 90.1, GB/T 90.2

A flat countersunk screw with a cross recess and a metric machine thread. This GB/T 819.1 reference covers property class 4.8.

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