Click Specification

(Non-preferred) dimensions in parentheses.

Slotted Countersunk Head Screws

GB 68 - 1985

Display drawing:

Download CAD Model^*

^*Models with different eras.

Calculate weight and price. Weight 1000 pcs : kg x $ per kg = $ 1000 pcs

Default density g/cm³

Nominal Length L Tips:seclect Nominal Length L and get Weight Thread length.

Screw Thread
d

M1.6

M2.5

M10

P	Pitch
a	max
b	min
d_k	Theoretical	max
	Actual	max=nominal size
		min
k	max=nominal size
n	Nominal Size
	max
	min
t	max
	min
x	max

0.35	0.4	0.45	0.5	0.7	0.8	1	1.25	1.5
0.7	0.8	0.9	1	1.4	1.6	2	2.5	3
25	25	25	25	38	38	38	38	38
3.6	4.4	5.5	6.3	9.4	10.4	12.6	17.3	20
3	3.8	4.7	5.5	8.4	9.3	11.3	15.8	18.3
2.7	3.5	4.4	5.2	8	8.9	10.9	15.4	17.8
1	1.2	1.5	1.65	2.7	2.7	3.3	4.65	5
0.4	0.5	0.6	0.8	1.2	1.2	1.6	2	2.5
0.6	0.7	0.8	1	1.51	1.51	1.91	2.31	2.81
0.46	0.56	0.66	0.86	1.26	1.26	1.66	2.06	2.56
0.5	0.6	0.75	0.85	1.3	1.4	1.6	2.3	2.6
0.32	0.4	0.5	0.6	1.0	1.1	1.2	1.8	2
0.9	1	1.1	1.25	1.75	2	2.5	3.2	3.8

Weight of per 1000 steel products(≈kg)

Length of Thread b

①,Try not to use the specifications in parentheses
②,When L value( M1.6~M3.0 screw)≤ 30mm, full thread should be made（b=L-k-a）;
③,When L value( M3.5~M10 screw)≤ 45mm, full thread should be made（b=L-k-a）;

Alternative history

GB 68 - 1985 GB /T 68 - 2000 GB /T 68 - 2016

Suppliers

Best price if from GlobalFastener.com.

GotopScrews International Co., Limited

Manager Zhuang
+86-13008864675
+86-755-89505088

Material: carbon steel, alloy steel, stainless steel, copper, aluminum, titanium; Specifications: M0.6~M6; Length: 1~60mm; Surface Treatment: galvanizing, nickel plating, zinc nickel alloy, electrophoresis, dacromet, CD grain, PVD, etc.

Jiangsu BofanKe Precision Metal Technology Co., Ltd.

Director Tang
+86-15298892886/15262400870
+86-516-86839568

Material: stainless steel, carbon steel; Nominal diameter: M1-M14; Nominal length: 5-400mm

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Similar Standards

1	[DIN] DIN 963 - 1990	Slotted Countersunk Head Screws View Suppliers
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21	[DIN] DIN 7969 - 2017	Slotted Countersunk Head Bolts with Hexagon Nut for Steel Structures
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25	[DIN] DIN 8245 - 1972	Slotted Countersunk (Flat) Head Screws for Fine Mechanics; M 0.4 to M 1.4
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27	[BS] BS 1981 - 1991	Slotted Countersunk Flat Head Screws
28	[GB] GB 948 - 1988	Slotted Countersunk Head Screws with Waisted Shank
29	[BS] BS 4183 (T2) - 1967	Slotted Countersunk Head Machine Screws. Metric Series
30	[JIS] JIS B 1179 (T1-1) - 1994	Slotted Flat Head Bolts, Fine Finished [Table 1-1]
31	[JIS] JIS B 1101 (AT3) - 1996	Slotted Countersunk Head Screws [Attached Table 3]
32	[BS] BS 1981 - 1991	Slotted Truncated Countersunk Head Screws: Short Length
33	[NF] NF F 03-016 - 1983	Railway Rolling Stock Grade A Slotted Countersunk Head Screws Nuts Symbol FP
34	[BS] BS 450 - 1958	Slotted 90°Countersunk Head Screws with B.S.W. & B.S.F. Threads [Table 2]
35	[JIS] JIS B 1101 (JA4) - 2017	Slotted Countersunk Head Screws - Table JA.4
36	[UNI] UNI 6109	Slotted Countersunk Flat Head Screws
37	[JIS] JIS B 1179 (T1-2) - 1994	Slotted Flat Head Bolts, Rough Finished [Table 1-2]
38	[NF] NF F 03-004 (F) - 1983	Railway Rolling Stock Grade A Countersunk Notched Head Machine
39	[JIS] JIS B 1101 (T8) - 2017	Slotted Countersunk Head Screws - Table 8
40	[JIS] JIS B 1101 (AAT2) - 1996	Slotted Countersunk Head Screws [Annex Attached Table 2]
41	[JIS] JIS B 1116 (T4) - 2009	Slotting Countersunk Head Screws for Fine Mechanics
42	[NF] NF E 25-123 - 1994	Slotted Countersunk Flat Head Screws - Product Grade A
43	[AS] AS /NZS 1427 - 1996	ISO Metric Slotted Countersunk Head Screws [Table 1]
44	[CNS] CNS 9678 - 1982	Slotted Countersunk Screws for Fine Mechanics
45	[CNS] CNS 4411 - 1981	Slotted Countersunk Head Screws
46	[CNS] CNS 4420 - 1981	Slotted Countersunk Head Bolts
47	[CNS] CNS 4363 - 1980	Slotted Countersunk Head Screws for Fine Mechanics
48	[KS] KS B 1021 (T5) - 2012 (R2022)	Slotted Countersunk Flat Head Screws [Table 5]
49	[GOST] GOST 17475 - 1980	Countersunk Head Screws of Accuracy Classes A and B（Slotted）
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