Tunnel Bolts, M22 M25 Spear Bolts with washer and socket

Name

Track Bolt Type

HS26 Bolt, HS32 Bolt, T Bolt, J Bolt, L Bolt, etc

Or by customers’ drawings

Track Bolt Grade

4.6

5.6

8.8

10.9

Track Bolt Material

Q235

35#

45#

40Cr

Track Bolt 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 no crack

Cold bending:

90 degree no crack

Cold bending:

90 degree no crack

Cold bending:

90 degree no crack

Track Bolt Surface

plain (oiled), Oxide black, Zinc, HDG, wax, bitumen, Dacromet, Sherardizing

Track Bolt Standards

UIC864-2