Button Head Oval Neck and Diamond Neck Fish Bolt Specifications
Sep 22, 2025
Fish bolt belongs to the series of rail bolt, or track bolt, which are used to fix 2 fish plate connections onto 2 rail tracks, GNEE RAIL fabricate fish bolt using high quality steel materials,such as Q235, 45#, 40Cr, 20Mntib,even stainless steel, covers international standards according to BS, ASTM and DIN, among others.
Fish bolt can be manufactured for the following standards: BS 20M, 30M, 35M, 35R, 50 O, 60A, 75R, 80R, 80A, 95RBH, and 113A; DIN S10, S14, S18, S20, S24, S30, S49, UIC54, UIC60; and AREMA 40ASCE, 60ASCE, 75ASCE, 90ARA, 115RE. Typical fish bolt grades are: 4.8, 6.8, 8.8, 10.9, 12.9, surface treatment can be plain, black, zinc-plated.-Send us your drawing and we can produce it according to your requirements, you will get a free sample before the mass production.
Send your special customization requirements to GNEE.
Typical Rail Bolt Specifications
| Railway Fish bolt | ||||
|---|---|---|---|---|
| Grade | 4.6 | 5.6 | 8.8 | 10.9 |
| Material | Q235 | 35# | 45# | 40Cr |
| Mechanical properties | Tensile strength: ≥400Mpa | Tensile strength: ≥500Mpa | Tensile strength:≥800Mpa | Tensile strength: ≥1000Mpa |
| Yield strength:≥240Mpa | Yield strength:≥300Mpa | Yield strength:≥640Mpa | Yield strength:≥900Mpa | |
| Elongation:≥22% | Elongation:≥20% | Elongation:≥12% | Elongation:≥9% | |
| Cold bending: 90 degree without crac | Cold bending: 90 degree without crac | Cold bending: 90 degree without crac | Cold bending: 90 degree without crac | |
| Surface | plain (oiled), Oxide black, Zinc, HDG, wax, bitumen, Dacromet, Sherardizing | |||
| Standard refers | UIC864-2 | |||
There are 2 fish bolt types which has been produced most frequently: button head oval neck fish bolts and diamond neck fish bolt.
Button Head Oval Neck Fish Bolt
| Diameter | 1/2" | 1/2" | 1/2" | 5/8 | 3/4 | 3/4 | 3/4 | 7/8 | 7/8 | 1 | 1 | 1 | 1-1/16 | 1-1/8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Length | 1-3/4" | 2" | 2-1/4 | 2-1/2 | 3 | 3-1/2 | 4 | 4-1/2 | 5 | 5 | 5-1/2 | 6 | 6 | 6-1/2 |
| Weight (Kg) | 0.097 | 0.1 | 0.112 | 0.183 | 0.328 | 0.339 | 0.356 | 0.559 | 0.593 | 0.8 | 0.839 | 0.879 | 0.995 | 1.186 |
Diamond Neck Fish Bolts
| Diameter | Length | Weight (Kg) |
|---|---|---|
| 7/8 | 4-1/2 | 0.563 |
| 7/8 | 5-1/2 | 0.651 |
| 1 | 5-1/4 | 0.889 |
| 1 | 5-3/4 | 0.895 |
| Note: All fish bolt dimensions given in inches. | ||
Other Fish Bolt Types and Details
Russian Standard Fish Bolt
| Russia scale fish bolt | Bolt Details |
|---|---|
| Size | 27x160 |
| Material | Tensile stress 381KN |
| Standard | GOST 11530 |
| Surface treatment | Plain oiled |
Square Head Fish Bolt
| Square head fish bolt | Bolt Details |
|---|---|
| Size | M20, L as ordered |
| Grade | 4.6, 5.6 |
| Standard | DIN5903-2 Type B |
| Surface treatment | Zinc plated, hot dip galvanized |
