Cerbera bolt and fastener sizes

This page lists the fasteners used around the TVR Cerbera’s chassis, suspension, brakes and drivetrain. It is a handy crib sheet when ordering replacement bolts during a rebuild, or when sorting out a tub of mixed hardware after stripping a car down.

All figures are taken from a community-compiled list and should be sanity-checked against the bolts actually fitted to your car — Cerberas were hand-built and small differences do appear between cars and model years (see the late-1998 4.2 notes at the foot of the page).

Caution

Suspension, steering and brake fasteners are safety-critical. Always use the correct grade of bolt (high tensile where specified), fit new self-locking nuts where appropriate, and torque to the manufacturer’s figures. If in doubt, consult a TVR specialist.

Front suspension

Fasteners for the front double-wishbone setup, hub carrier and front brake calliper mounts.

Location	Diameter	Thread	Length	Material	Qty per car
Front shock, upper	1/2”	UNF	3 1/2”	HT	2
Front shock, lower	1/2”	UNF	3 1/2”	HT	2
Upper arm inner, front	7/16”	UNF	3 1/2”	HT	2
Upper arm inner, rear	7/16”	UNF	5”	HT	2
Lower arm inner	7/16”	UNF	3 1/2”	HT	2
Lower drag strut inner	7/16”	UNF	3 1/2”	HT	2
Upper ball joint inner	7/16”	UNF	5 1/2”	HT	2
Upper ball joint outer	7/16”	UNF	3”	HT	2
Upper ball joint mounting plate to hub	M8	Coarse	20 mm	HT	8
Lower steering arm to hub	M12	Coarse	30 mm	HT	8
Lower ball joint to suspension arm	M8	Coarse	20 mm	HT	8
Calliper spacer to hub	M10	Coarse	30 mm	HT	4
Calliper to spacer	M10	Fine 1.25	60 mm	HT	4
Hub retainer bolt	1/2”	UNF	4 1/4”	HT	2
Wheel bearing to hub	M12	Coarse	30 mm	HT	6
Lower drag strut to lower arm	M12	Coarse	60 mm	HT	2

Rear suspension

Fasteners for the rear wishbones, hub carrier, brake calliper and differential mounting.

Location	Diameter	Thread	Length	Material	Qty per car
Rear shock, upper	1/2”	UNF	4 1/2”	HT	2
Rear shock, lower	1/2”	UNF	3 1/2”	HT	2
Rear hub, top	7/16”	UNF	3 1/2”	HT	2
Rear hub, front	7/16”	UNF	3 1/2”	HT	2
Rear hub, rear	7/16”	UNF	3 1/2”	HT	2
Upper arm, front	1/2”	UNF	4 1/2”	HT	2
Upper arm, rear	7/16”	UNF	2 3/4”	HT	2
Lower arm, front	7/16”	UNF	5”	HT	2
Lower arm, rear	7/16”	UNF	3 1/2”	HT	2
Calliper to hub	M10	Coarse	60 mm	HT	4
Wheel bearing to hub	M12	Coarse	30 mm	HT	6
Diff mount to chassis	7/16”	UNF	3 1/2”	HT	3

Driveline and differential

Location	Diameter	Thread	Length	Material	Qty per car
Diff to front brackets	M12	Coarse	30 mm	HT	4
Diff to rear bracket (short)	M10	Coarse	30 mm	HT	2
Diff to rear bracket (long)	M10	Coarse	40 mm	HT	2
Prop shaft to diff flange (Nyloc)	3/8”	UNF	1 1/4”	8.8 HT	4
CV joint	M10	Fine 1.25	60 mm	HT	24

Anti-roll bar

The rear anti-roll bar mounting changed during production. Early cars mount the brackets under the chassis with M6 bolts; later cars mount over the chassis with M8.

Location	Diameter	Thread	Length	Material	Qty per car
Rear ARB brackets — early (under)	M6	Coarse	25 mm	HT	4
Rear ARB brackets — later (over)	M8	Coarse	25 mm	HT	4
Rear ARB drop-link to lower arm	M10	Coarse	75 mm	HT	2

Steering

Location	Diameter	Thread	Length	Material	Qty per car
Steering UJ pinch bolt	M8	Coarse	35–40 mm	HT	2
Steering rack mounting bolt	M8	Coarse	40 mm	Standard	4

Engine, exhaust and ancillaries

Location	Diameter	Thread	Length	Material	Qty per car
Engine mount bracket to chassis	M10	Coarse	70 mm	Standard	4
Floor pan to chassis	M10	Coarse	30 mm	Standard	9
Water rail to cylinder head	M8	Coarse	20 mm	Standard	16
Exhaust to cylinder head	M8	Coarse	25 mm	Standard	16
Aircon tensioner bearing mount	M8	1.25	20 mm	HT	1
Aircon tensioner bearing bracket	M10	1.5	30 mm	HT	2

Variations noted on a 1998 4.2

A number of cars have slightly different fasteners in a few locations. Differences recorded on one late-1998 4.2-litre car are listed below — worth checking before ordering replacements.

Location	Diameter	Thread	Length	Material	Qty per car
Front upper ball joint outer	7/16”	UNF	3 1/4”	HT	2
Front shock, lower	1/2”	UNF	3 1/4”	HT	2
Rear wheel bearing to hub	M12	Coarse	35 mm	HT	6

Notes on usage

• “HT” denotes high-tensile fasteners (typically grade 8.8 or better in metric, or equivalent in imperial). Don’t substitute mild-steel bolts in any suspension, steering, brake or driveline position.
• Imperial lengths are measured under the head, as is the convention for UNF bolts.
• Where a Nyloc is specified, fit a new one each time the joint is disturbed.
• This list covers fastener sizes only; torque figures should be taken from a workshop manual appropriate to your car.

Compiled from a community-uploaded reference list — always verify against your own car and the relevant workshop manual before relying on it.