High Quality 14x40 Anti-loosening Excavator Bolt and Nut for Track Chain
Railway Track Bolt
Rail track bolts are high-strength fasteners securing rails to sleepers (ties) and joining rail sections via fish plates. Made of 10.9/12.9 grade alloy steel (with phosphated or galvanized coatings for corrosion resistance), they withstand extreme dynamic loads, vibration, and temperature fluctuations. Standards like ISO 898-1 dictate tensile strength (≥1000MPa) and thread precision for secure clamping.
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thread size
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3/4
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7/8
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1
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1-1/8
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M10
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d
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PP
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10
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9
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8
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7
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1.5
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ds
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Min
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0.729
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0.852
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0.976
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1.098
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16
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Max
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0.768
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0.895
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1.022
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1.149
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15.73
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dk
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nominal
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1-9/32
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1-31/64
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2001/11/16
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1-57/64
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6
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Min
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1.2188
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1.4219
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1.625
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1.8281
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5.7
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Max
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1.3438
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1.5469
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1.75
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1.9531
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2.81
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k
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nominal
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15/32
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35/64
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5/8
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45/64
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2.56
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Min
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0.4063
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0.4844
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0.5625
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0.6406
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2.4
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Max
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0.5313
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0.6094
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0.6875
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0.7656
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r3
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1-5/32
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1-25/64
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2001/5/8
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1-55/64
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r4
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7/16
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33/64
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19/32
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43/64
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ds2
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nominal
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63/64
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2001/3/16
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2001/3/8
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2001/1/2
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Min
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0.9531
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1.1563
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1.3438
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1.5313
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Max
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1.0156
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1.2188
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1.4063
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1.4688
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ds1
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nominal
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61/64
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1-5/32
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1-11/32
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1-15/32
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Min
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0.9219
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1.125
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1.3125
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1.4375
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Max
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0.9844
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1.1875
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1.375
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1.5
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k1
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7/16
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1/2
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9/16
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5/8
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r1
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9/32
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5/16
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3/8
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7/16
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r2
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41/64
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51/64
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15/16
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1
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b
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Min
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2001/3/4
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2
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2002/1/4
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2002/1/2
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r
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Max
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0.7
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Min
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0.4
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Ls
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Max
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13.25
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Min
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12.75
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t
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Addendum Width
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Max
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0.5
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da
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Diameter of the transition circle
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Max
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14
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Anti-loosening Excavator Bolt and Nut,Track Bolt and Nut,14x40 Bolt and Nut,High Quality Track Chain,14x40 Excavator Bolt and Nut
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