PEARL Reconditioning Standards Revision

Reference Number Date U. S. STANDARD

BUS CONNECTION BOLT TORQUE VALUES 6001 5 11-2008

6001 - 1 PEARL

TABLE 1

U. S. Standard Bus Connection

Bolt Torque Values

Heat Treated Steel – Cadmium or Zinc Plated GRADE SAE 1 & 2 SAE 5 SAE 7 SAE 8

MINIMUM TENSILE

(P.S.I.)

64K

105K

133K

150K

BOLT DIAMETER

(IN INCHES)

TORQUE (FOOT POUNDS)

1/4 4.0 5.6 8.0 8.4 5/16 7.2 11.2 15.2 17.6 3/8 12.0 20.0 27.2 29.6 7/16 19.2 32.0 44.0 48.0 1/2 29.6 48.0 68.0 73.6 9/16 42.4 70.4 96.0 105.6 5/8 59.2 96.0 133.6 144.0 3/4 96.0 160.0 224.0 236.8 7/8 152.0 241.6 352.0 378.4 1.0 225.6 372.8 528.0 571.2

Silicon Bronze Fasteners* Torque (Foot-Pounds)

Bolt Diameter in Inches Non-Lubricated Lubricated 5/16 15 10 3/8 20 14 1/2 40 25 5/8 55 40 3/4 70 60

* Bronze alloy bolts shall have a minimum tensile strength of 70,000 pounds per square inch.

PEARL Reconditioning Standards Revision

Reference Number Date U. S. STANDARD

BUS CONNECTION BOLT TORQUE VALUES 6001 5 11-2008

PEARL 6001 - 2

Stainless Steel Fasteners**

Torque (Foot Pounds) Bolt Diameter in Inches Uncoated

5/16 14 3/8 25 1/2 45 5/8 60 _ 90

** Bolts, cap screws, nuts, flat washers, locknuts: 18-8 alloy. ** Belleville Washers: 302 alloy.

Aluminum Alloy Fasteners*** Torque (Foot Pounds)

Bolt Diameter in Inches Lubricated 5/16 8.0 3/8 11.2 1/2 20.0 5/8 32.0 3/4 48.0

*** Aluminum alloy bolts shall have a minimum tensile strength of 55,000 pounds per square inch.