Schroth Racing All models - Competition Instructions - Manual (Page 20)

Important Information About Bolts and
Torques
B
OLT
D
IAMETER
• Stock thread holes commonly are 7/16” 20 UNF. Therefore, all
SCHROTH models come with bolts and eye-bolts matching this
dimension.
• A few chassis are manufactured with 15/32” or ½” thread holes at the
inner [centre tunnel] anchorages. See the section “Brackets” for those
thread holes that accept 15/32” or ½” bolts.
• Individually made chassis and roll cages often use other dimensions,
which vary from 8 mm or 5/16” [mostly for anti-submaring strap
installation] to 10 mm or 3/8” in diameter for lap- and shoulder belt
installation.
• Eye-bolts for 10 mm thread holes [P/N SG 35] are available at your
SCHROTH-dealer or importer.
• For all other dimensions you must provide the correct bolt diameter,
type of thread and bolt length.
Bolts not supplied by SCHROTH must be of grade 8.8 at a minimum.
1. Bolts must fit to the thread dimension of the anchorage chosen.
2. Bolts must be long enough to fill the thread hole completely with all
bushings, spring washers, spacers etc. in place for installation.
3. Bolts must be of correct length and must not to intrude into the fuel
tank or damage any other components of the car in which they are
installed.
• Never use bolts of the wrong diameters or bolts that are too short
and may allow the bolts to become loose and separate from the
anchorages. Use of improper bolts will cause the racing harness
to fail.
• Never use bolts that are too long and may intrude into the fuel
tank or other parts of the car.
• Always tighten bolts with the proper torque. Improperly
tightened bolts may loosen during harness belt use and may
become separated during a crash.
• Never over-tighten bolts. Over-tightening bolts may destroy the
thread and allow the bolt to separate during a crash.
BOLT FAILURE MAY RESULT IN SEVERE INJURIES OR DEATH.
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