Z678 · ALUMINUM THIN LOCK NUT M4 (PURPLE)

Brand: HPI Racing
Part number: Z678
Source: HPI E-Firestorm 10T Instruction Manual · HPI Nitro RS4 3 Drift Instruction Manual
Category: Nuts · more from HPI Racing
Product page: manufacturer website
Upgrade for: Z684 FLANGED LOCK NUT M4
Pack: 5 pcs
Material: aluminium
Colour: purple
Spec: M4 thin lock nut (locking kind not stated)
Thread: M4
Type: lock
Profile: thin
Across flats (mm): 7
Modified: 2026-11-01

Drawn, from the generic size M4 thin lock nut (locking kind not stated). * not fixed by the spec: drawn with the usual proportions for this type.

Equivalent to

Generic spec	Match	Standards	Source
M4 thin lock nut (locking kind not stated)	functional		Thread and type read from the manufacturer's description; the standard is not cited by the brand

Platform	How	Source
HPI Racing E-Firestorm	listed (1 release); fitment list: replaces	HPI Racing part pages on www.hpiracing.com: name and the kits each part fits
HPI Racing Nitro MT2	fitment list: replaces	HPI Racing part pages on www.hpiracing.com: name and the kits each part fits
HPI Racing Nitro RS4 3	listed (1 release); fitment list: replaces	HPI Racing part pages on www.hpiracing.com: name and the kits each part fits
HPI Racing Nitro Rush	fitment list: replaces	HPI Racing part pages on www.hpiracing.com: name and the kits each part fits
HPI Racing Pro 4	fitment list: replaces	HPI Racing part pages on www.hpiracing.com: name and the kits each part fits
HPI Racing R40	fitment list: replaces	HPI Racing part pages on www.hpiracing.com: name and the kits each part fits
HPI Racing RS4 Pro 3	fitment list: replaces	HPI Racing part pages on www.hpiracing.com: name and the kits each part fits
HPI Racing Sprint 2	fitment list: replaces	HPI Racing part pages on www.hpiracing.com: name and the kits each part fits
HPI Racing Wheely King	fitment list: replaces	HPI Racing part pages on www.hpiracing.com: name and the kits each part fits

Year	Release	Role
2017 Feb	HPI Racing E-Firestorm 10T	listed
2017 Feb	HPI Racing Nitro RS4 3 Drift	listed

Compatibility according to the manufacturer's parts lists; see each release for the source document.