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GB 21 - 1976

Small Hexagon Head Bolts

GB 21 - 1976 小六角头螺栓

See all versions and complete specifications: Small Hexagon Head Bolts — Full Specification Page

Equivalent & Cross-Reference Standards

Standard Body	Standard Number
GB	GB /T 5785
DIN	DIN EN ISO 8765
ISO	ISO 8765

Dimensional Specifications — GB 21 - 1976 (mm)

Size	P	k_max	k_min	s_max	s_min	ds_max	k_nominal	ds_nominal
M8	1.5	6.24	5.76	14	13.76	0.4	6	16.2
M10	2	8.29	7.71	19	18.72	0.6	8	21.9
M12	2.5	10.29	9.71	24	23.72

Related Standards

GB 22 - 1976— Bolts, Small Hexagon Head with Fit Neck JIS B 1180 (AT2.1) - 2004— Small Hexagon Head Bolts, Finished JIS B 1180 (AT2.2) - 2004— Small Hexagon Bead Bolt, Semi-Finished JIS B 1180 (AT2.1) - 1994— Small Hexagon Head Bolts, Finished [Annex Attached Table 2.1]JIS B 1180 (AT2.2) - 1994— Small Hexagon Head Bolts, Semifinished [Annex Attached Table 2.2.]CNS 3120 - 1987— Hexagon Bolts with Small Widths Across Flats CNS 4700 - 1987— Small Hexagon Head Bolts with Thread Approximately To Head, Small Widths Across Flats GOST 7817 - 1980— Product Grade A Fit Bolts with Hexagon Reduced Head

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