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Inconel 718 Hex Flange Screws to JIS B 1189 Hexagon Flange Bolts

Bolts--bolts with full shank (standard type)

Bolts--bolts with full shank (standard type)

Bolts--bolts with reduced shank, type R (upon request)

Bolts--bolts with reduced shank, type R (upon request)

Bolts--profiles of underhead (bearing surface area)

Bolts--profiles of underhead (bearing surface area)

    Notes
  • The top of the head shall be either full form or indented at the manufacturer's discretion and shall be either chamfered or rounded. The minimum diameter of the chamfer circle or start of rounding shall be the maximum width across flats minus 15 %. If the top of the head is indented, the periphery may be rounded.
  • Edge contour optional.
  • Chamfered end (See JIS B 1003).
  • b = 15° to 30°
  • kw is the wrenching height; see the note to attached table 1.1.
  • Incomplete thread u ≤ 2P.
  • Rounded, chamfered or conical.
  • db is approximately equal to the pitch diameter (rolling diameter).
  • c is measured at dw.min
  • δ = 15° to 25°.
  • Maximum and minimum underhead fillet.
  • Junction of fillet with bearing surface to be a smooth blend.

JIS B 1189 Hexagon Flange Bolts--course thread--product grade A Dimensions

Unit:mm

Designation of thread
(d)		 M5 M6 M8 M10 M12 (M14)(13) M16
P(14) 0.8 1 1.25 1.5 1.75 2 2
b(ref) (15) 16 18 22 26 30 34 38
(16) -- -- 28 32 36 40 44
(17) -- -- -- -- -- -- 57
c min. 1 1.1 1.2 1.5 1.8 2.1 2.4
da Type F max. 5.7 6.8 9.2 11.2 13.7 15.7 17.7
Type U 6.2 7.5 10 12.5 15.2 17.7 20.5
dc max. 11.4 13.6 17 20.8 24.7 28.6 32.8
ds max. 5.00 6.00 8.00 10.00 12.00 14.00 16.00
min. 4.82 5.82 7.78 9.78 11.73 13.73 15.73
dv max. 5.5 6.6 8.8 10.8 12.8 14.8 17.2
dw min. 9.4 11.6 14.9 18.7 22.5 26.4 30.6
e min. 7.59 8.71 10.95 14.26 16.5 19.86 23.15
k max. 5.6 6.9 8.5 9.7 12.1 12.9 15.2
kw min. 2.3 2.9 3.8 4.3 5.4 5.6 6.8
lr max. 1.4 1.6 2.1 2.1 2.1 2.1 3.2
r1 min. 0.2 0.25 0.4 0.4 0.6 0.6 0.6
r2(18) max. 0.3 0.4 0.5 0.6 0.7 0.9 1
r3 max. 0.25 0.26 0.36 0.45 0.54 0.63 0.72
min. 0.10 0.11 0.16 0.20 0.24 0.28 0.32
r4 (ref.) 4 4.4 5.7 5.7 5.7 5.7 8.8
s max. 7.00 8.00 10.00 13.00 15.00 18.00 21.00
min. 6.78 7.78 9.78 12.73 14.73 17.73 20.67
v max. 0.15 0.20 0.25 0.30 0.35 0.45 0.50
min. 0.05 0.05 0.10 0.15 0.15 0.20 0.2.5
l(19)(20) ls and lg(21)
nom.
length		 min. max. ls
min.		 lg
max.		 ls
min.		 lg
max.		 ls
min.		 lg
max.		 ls
min.		 lg
max.		 ls
min.		 lg
max.		 ls
min.		 lg
max.		 ls
min.		 lg
max.
10 9.71 10.29 --

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12 11.65 12.35
16 15.65 16.35
20 19.58 20.42 -- -- -- -- -- -- -- --
25 24.58 25.42 5 9 -- -- -- -- -- -- -- --
30 29.58 30.42 10 14 7 12 -- -- -- -- -- -- -- --
35 34.5 35.5 15 19 12 17 6.75 13 -- -- -- -- -- -- -- --
40 39.5 40.5 20 24 17 22 11.75 18 6.5 14 -- -- -- -- -- --
45 44.5 45.5 25 29 22 27 16.75 23 11.5 19 6.25 15 -- -- -- --
50 49.5 50.5 30 34 27 32 21.75 28 16.5 24 11.25 20 6 16 -- --
55 54.4 55.6 32 37 26.75 33 21.5 29 16.25 25 11 21 7 17
60 59.4 60.6 37 42 31.75 38 26.5 34 21.25 30 16 26 12 22
65 64.4 65.6 36.75 43 31.5 39 26.25 35 21 31 17 27
70 69.4 70.6 41.75 48 36.5 44 31.25 40 26 36 22 32
80 79.4 80.6 51.75 58 46.5 54 41.25 50 36 46 32 42
90 89.3 90.7 56.5 64 51.25 60 46 56 42 52
100 99.3 100.7 66.5 74 61.25 70 56 66 52 62
110 109.3 110.7 71.25 80 66 76 62 72
120 119.3 120.7 81.25 90 76 86 72 82
130 129.2 130.8 80 90 76 86
140 139.2 140.8 90 100 86 96
150 149.2 150.8 96 106
160 159.2 160.8 106 116

    Notes

  • The Size in Parentheses should be avoided if possible.
  • P is the pitch of the thread
  • For Lengths lnom ≤ 125 mm.
  • For Lengths 125 mm < lnom ≤ 200 mm.
  • Radius r2 applies at the junction of the hexagon portion (both opposite side and opposite angle)
    and the flangew part.
  • Screws with lengths shown above the thick stepped line are threaded to head.
  • reduced shank type (type R) onky below the dashed stepped line.
  • lg is the minimum grip length.

Note: If the product passes the gauging in annex A, the requirements for dimensions c, e and kw are satisfied.