SOCKET HEAD CAP SCREWS
SMALL HEAD CAP SCREWS
Part Number Type M–L
Part Number Type M–L
ℓ
ℓ
CB
CBHS
M × P
× P
M
CB 8–95 100 110 120 130 140 150 160 200 CB 10–10 12 15 20 25 30 35 40
CB 16–20 25 30 35 40 45 50 55 60
28
ℓ
Full Thread
l
L
B
E
L
B
E
E Details of dimensions and strength ranks d Right page M Material SCM435 (M3–M20) SCM440 (M24) H Hardness 38–43HRC (M3–M20) 32–37HRC (M24) Screw part : Class 2 JIS B 0205
s Surface treatment
Black Oxide
M Material
SCM435
s Surface treatment Black Oxide
65 70 75 80 85 90 95
E CBHS is made by grinding down the head of CB, part of the stamped
Bolt precision JIS B 1176 Strength rank 12.9 (M3–M20) 10.9 (M24)
H Hardness
38–43HRC Screw part : Class 2 JIS B0205
Bolt precision JIS B1176 Strength rank 12.9
characters on the head surface may sometimes remain visible.
Full Thread
Part Number Type M–L
Part Number Type M–L
Part Number Type M–L
Part Number Type M–L CBHS 8–15 20 25 30 35
Part Number Type M–L
Part Number Type M–L
Part Number Type M–L CBHS 6–10 12 15 20 25 30
ℓ
ℓ
ℓ
ℓ
ℓ
ℓ
ℓ
CB 5–75 80 85 90 95
CB 3–5 6 8
100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270 280 290 300 310 320
CBHS 3–5 6 8
CBHS 4–5 6 8
CBHS 5–8 10 12 15 20 25
45 50 55 60 65 70 75 80 85 90 95
Full thread
10 12 14 15 16 18 20 22 25 30 35 40 45 50 55 60 65
Full thread
Full thread
10 12 15 20 25
10 12 15 20 25 30 35
Full thread
Full thread
22
100 110 120 130 140
Full thread
40 45 50 55 60
30 35 40 45
35 40 45 50
44
18
28
22
24
20
CB 6–6 8
32
10 12 14 15 16 18 20 22 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95
100 110 120 130 140 150 160 170 180 190 200 210
Part Number CB 8–40 CBHS 5–10
Order
18
Full Thread
Delivery Quotation
CB 4–5 6 8
CB Hexagonal socket head screw
Hexagonal socket small head cap screw CBHS
E The bolt tightening part S 1 of CBHS is smaller than the bolt tightening part S of CB, and also the tightening force is weaker than that of CB. If you wish to obtain an adequate tightening force, consider adding more bolts. It is also recommended that you reduce the size of the counterbore machining. (See figure at right.) If you remove an excessive amount of the C–chamfering, the bolt head may become recessed below the mounting part.
10 12 14 15 16 18 20 22 25 30 35 40 45 50 55 60 65 70 75
CB 20–40 45 50 55 60 65 70 75
CB 12–15 20 25 30 35 40 45 50
Full thread
S
S 1
C Chamfer
Full Thread
Full Thread
S ＞ S 1
■ Details Size and Strength Rank of Socket Head Cap Screw M × P (coarse thread) A E B CB CBHS M 3 × 0.5 5.54.5 32.5 M 4 × 0.7 7 5.5 43 M 5 × 0.8 8.5 7 5 4 M 6 × 1.0 10 8.5 65 M 8 × 1.25 13 11 8 6 M10 × 1.5 16 – 10 8 M12 × 1.75 18 – 12 10 M14 × 2.0 21 – 14 12 M16 × 2.0 24 – 16 14 M20 × 2.5 30 – 20 17 M24 × 3.0 36 – 24 19
※ "Strength rank" signifies tensile strength of bolts. (Example) 12.9 (CB3–20)
24
80 85 90 95
55 60 65 70 75 80 85 90 95
〔 Technical Data 〕 • Screw lower hole table D P.1225
Indicates that the yield point or the minimum proof strength is 90% of the tensile strength. Indicates that the minimum tensile strength is 1220N/mm 2 {124kgf/mm 2 }.
100 110 120 130 140 150
100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250
10.9 (CB24)
20
Indicates that the yield point or the minimum proof strength is 90% of the tensile strength. Indicates that the minimum tensile strength is 980N/mm 2 {100kgf/mm 2 }.
52
100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270 280 290
CB 8–8 10 12 15 16 18 20 22 25 30 35
CB 5–5 6 8
36
Hexagonal socket head screw
10 12 14 15 16 18 20 22 25 30 35 40 45 50 55 60 65 70
CB
Example
Full Thread
Full Thread
CB 24–50 60 70 80
Spring washers
Full Thread
40 45 50 55 60 65 70 75 80 85 90
CBW
P.1102
90 100 110 120 130 140 150
28
22
60
40
CB 14–30 35 40
Full Thread
1099
1100
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