Prevailing-Torque Lock Nuts for Automotive Structural and Vibration Joints
Lock Nuts
Prevailing-torque nuts — nylon-insert, all-metal distorted-thread, and K-lock designs. Lock feature prevents back-off under vibration and cyclic loading without thread-lock adhesive or secondary retention.
Broad specification coverage across DIN 982 (thin), DIN 985 (tall), DIN 6927 (all-metal prevailing-torque), JIS NE / NTE equivalents, and Keps / K-lock configurations — custom-configured per programme to customer drawing. Applications: automotive chassis, suspension, exhaust, engine accessories, and structural joints where continuous vibration or thermal cycling would loosen a standard hex nut.
Why source through Way Fast
We serve Tier 1 and Tier 2 automotive suppliers — primarily to North American OEM programs, including platforms shared with European and Japanese brands — with day-to-day experience handling the documentation and tolerance standards these projects demand.
01 · Multi-source capacity
Working with multiple qualified manufacturing partners — we match each order to the best-fit production line, stabilizing lead times and cost when single-source capacity tightens.
02 · Submission-grade documentation
Full support for PPAP (Levels 1–3), IMDS submission, and RoHS / REACH documentation.
03 · Audited special-process chain
Partners certified to AIAG CQI-9 (heat treat), CQI-11 (plating), and CQI-12 (coating) — covering the full post-processing chain under audited special-process controls.
04 · Multilingual drawing review
Technical drawing review in English, German, Japanese, and Chinese — including ISO 8015 GPS callouts, JIS standards, thread tolerance classes, and coating specifications.
05 · Lock mechanism and torque retention
Lock mechanism (nylon insert for up to ~120°C, all-metal for high-temp / re-usable, K-lock for captive-tooth retention), material grade, and finish matched per torque spec and service environment — drawing-reviewed against customer retention torque and re-use requirements. Configurations supplied per programme; established partnerships with qualified lock-nut manufacturers across DIN / JIS / ISO standards.
Family coverage · 3 types
Selecting across lock nut types
Nylon Insert — DIN 985 / 982 / NE / NTE
Baseline · temperature-sensitive
Nylon ring insert grips screw threads. Standard for ambient to moderate-temperature service (~ −50°C to +120°C). DIN 985 thin for bulk structural fastening; DIN 982 tall for higher retention. Most common lock nut type supplied through Way Fast — custom-configured in low-carbon steel, stainless, or brass per programme.
All-Metal Prevailing-Torque — DIN 6927 / 6928 / Stover
High-temperature · re-usable
Distorted-thread all-metal lock nut, no polymer insert. For temperatures above 120°C (engine, exhaust, turbocharger) and applications requiring multiple re-uses without loss of prevailing torque. Supplied in property class 8 / 10 grade per programme.
K-lock / Keps
Integrated tooth-lock washer · one-piece
Hex nut with captive external-tooth lock washer pre-assembled. Combines nut and washer in a single SKU, prevents loss and ensures consistent locking against flat bearing surfaces. Common on electrical enclosures, harness brackets, and general fastening.
Sizes
M2 – M30 · 3/16″ – 1-1/4″
Lengths
N/A — nut height per DIN / ISO / JIS specification.
Material
Low-carbon steel, medium-carbon steel (property class 8 / 10 for all-metal grades), stainless steel (A2 / A4), or brass — per customer specification.
Finishes
Zinc, zinc-nickel, Delta-Seal®, Geomet®, black oxide, nickel, or to customer specification.
Head types
N/A — nut form per DIN / ISO / JIS standard.
Drive
N/A — installation by standard torque wrench per thread specification.
Lead times
Quotation and production
Quotation
Within 5–7 business days from receipt of drawing and specifications.
Sample & production
Schedules issued per project.
Send your drawing, lock mechanism (nylon / all-metal / K-lock), thread spec, property class, and target volume — grade and finish custom-configured per programme drawing.
Supplied through qualified manufacturing partners to DIN 982 / DIN 985 / DIN 6927 / DIN 6928 / JIS B1056 / ISO 7040 / ISO 10511 specifications. Custom-configured per programme with PPAP / IMDS / RoHS / REACH documentation.
Special Nuts
