Page 492 - 日本前田TONE

Reference Material

Across Flat Width & Bolt Diameter

Metric thread series
The Hexagonal With a hexagonal hole Square
screw Small bolt / High strength Button
diameter Bolt / Nut Nut bolt nut Bolt bolt Shoulder bolt Set screw Bow bolt Bolt nut Large bolt Set screw
Dmm S1mm S1mm S1mm S2mm S2mm S2mm S2mm S2mm S1mm S1mm S1mm
M1.4 (1.3) (0.7)
M1.6 3.2 1.5(1.5) 0.7
M1.8 (0.7)
M2 4 1.5(1.5) 0.9
M2.2 (4.5)
M2.5 5 2 1.3
M3 5.5 2.5 2 (2) 1.5 2 5.5
M3.5 (6)
M4 7 3 2.5 (2.5) 2 2.5 7 4
M4.5 (8)
M5 8 4 3 3 2.5 3 8 5
M6 10 5 4 4 3 4 10 6
M7 11
M8 13 （12） 6 5 5 4 5 13 8
M10 16 (17) （14） 8 6 6 5 7 17 24 10
M12 18 (19) （17） 21（22） 10 8 8 6 8 19 30 12
M14 21 (22) （19） 12 22
M16 24 （22） 27 14 10 10 8 12 24 36
M18 27 （24） (14) 27
M20 30 (32) （27・29） 32 17 12 10 14 30 41
M22 34 (32･35) （30・32） 36 (17) 32 46
M24 36 (38) （32・35） 41 19 12 17 36 55
M27 41 （36） 46 (19)
M30 46 （41） 50 22
M33 50 （46） (24)
M36 55 (54) （50） 27
M39 60 (58) （55） (27)
M42 65 (63) 32
M45 70 (67) (32)
M48 75 (71) 36
M52 80 (77) (36)
M56 85 41
M60 90
M64 95 46
M68 (100)
M72 (105)
M76 (110)
M80 (115)
M85 (120)
M90 (130)
M95 (135)
M100 (145)
M105 (150)
M110 (155)
M115 (165)
M120 (170)
M125 (180)
M130 (180･185)
※ 1. For hexagonal bolt / small bolt, refer to JIS B 1180-2004, and for high strength bolt, refer to JIS B 1186-1995.
2. Refer to JIS B 1176-2006 for hex socket bolts, JIS B 1174-2006 for hex socket button bolts, and JIS B 1177-2007 for hex socket set screws.
3. For square bolt / large square bolt, refer to JIS B 1182-2009. For square set screw, refer to JIS B 1118-1995.
4. Values in ( ) are figures other than the old JIS or JIS.

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