Rosco RB48 - Bolt Torque Chart

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RB48 BROOM

ROSCO - A LeeBoy Company

Maintenance

4.16

BOLT TORQUE CHART

The table below gives correct torque values for various NON-LUBRICATED bolts. DO NOT lubricate

bolts unless otherwise specified in this manual. Check tightness of bolts periodically, using this table as

a guide. ALWAYS replace hardware with an equal strength fastener. When using locking fasteners,

increase torque values by 5%.

BOLT IDENTIFICATION BY HEAD MARKINGS:

ENGLISH METRIC

BOLT SIZE GRADE 5 GRADE 8 CLASS 8.8 CLASS 10.9

FT-LB N-M FT-LB N-M FT-LB N-M FT-LB N-M

M6 - - - - 7 10 11 15

1/4 9 12 12 17 - - - -

5/16 19 25 27 36 - - - -

M8 ----18252635

3/8 33 45 45 63 - - - -

M10 ----37505270

7/16 53 72 75 100 - - - -

M12 ----669092125

1/2 80 110 115 155 - - - -

M14 ----103140148200

9/16 115 155 165 220 - - - -

5/8 160 215 220 305 - - - -

M16 ----166225229310

3/4 290 390 400 540 - - - -

M20 ----321435450610

7/8 420 570 650 880 - - - -

M24 ----5537507741050

1 630 850 970 1320 - - - - -

M30 ----1103 1495 1550 2100