Sleeper screws are used to connect steel elements of track construction to wooden or concrete sleepers. They known as: chair screw spike, sleeper screw, collar bolt, lag bolt.
Kingrail Parts can produce rail chair screws in various sizes for customers. Our chair screws can reach UIC, AREMA, GB, BS, DIN, JIS, ISO and other standards.
Our Rail screws
AS Coachscrew
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|
5 1/2 ” AS Coachscrew |
6 5/16” AS Coachscrew |
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Length |
139.7mm±3.18mm |
160.34mm±3.18mm |
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Diameter & Neck |
Minor φ 17.46mm±0.38mm Major φ 23.8mm±0.38mm Neck φ 25.4mm±0.38mm×14.29mm |
Minor φ 17.46mm±0.38mm Major φ 23.8mm±0.38mm Neck φ 25.4mm±0.38mm×14.29mm |
|
Square head & Thickness |
@Top 16.99mm A/F ＋0mm －0.76mm @Bottom 28.58 A/F ＋0mm －0.76mm 31.75mm from top to underside of head ±1.27mm |
@Top 16.99mm A/F ＋0mm －0.76mm @Bottom 28.58 A/F ＋0mm －0.76mm 31.75mm from top to underside of head ±1.27mm |
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Material |
BS64, GB 699-88, 45# or 35# |
BS64, GB 699-88, 45# or 35# |
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Tensile strength |
550-700 N/mm |
550-700 N/mm |
|
Surface treatment |
Hot Dipped Galvanised (HDG) |
Hot Dipped Galvanised (HDG) |
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Weight |
Approximate 0.6kg |
Approximate 0.7kg |
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Elongation |
15% |
15% |
M Coachscrew
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|
6 5/16” M Coachscrew |
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Length |
160.34mm±3.18mm |
|
Diameter & Neck |
Minor φ 20.64mm±0.38mm Major φ 26.19mm±0.38mm Neck φ 25.4mm±0.38mm×14.29mm |
|
Square head & Thickness |
@Top 16.99mm A/F ＋0mm －0.76mm @Bottom 28.58 A/F ＋0mm －0.76mm 31.75mm from top to underside of head ±1.27mm |
|
Material |
BS64, GB 699-88, 45# or 35# |
|
Tensile strength |
550-700 N/mm |
|
Surface treatment |
Hot Dipped Galvanised (HDG) |
|
Weight |
0.7kg |
|
Elongation |
15% |
Manufacturing process:
1. Raw material 2. Wire drawing 3. Rod cutting 4. Head shaping 5. Edge cutting 6. Thread rolling 7. Heating 8. Treatment 9. Surface treatment 10. Inspection 11. Packaging 12. Transportation
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