Stainless Steel Nylon Insert Lock Nuts - Grade 202, 304, 316, A2, A2-70

Nylon insert lock nuts, commonly referred to as nyloc nuts, serve as a specialized fastener intended to secure against loosening caused by vibration or torque. They incorporate a nylon collar, smaller than the bolt thread, which generates ample friction upon tightening and effectively secures the nut in position. As a result of this unique locking feature, they are highly suitable for use in industries where vibration is a potential issue, such as automotive, aerospace, and construction fields.

Nylon Insert Lock Nuts Technical Specification

Parameter	Description
Standard	DIN 985, ISO 10511, DIN 982
Sizes Available	M3 to M48 (or 1/4" to 2")
Material	Stainless Steel, Carbon Steel, Brass
Nylon Type	Polyamide (PA 6 or PA 66)
Temperature Range	-40°C to +120°C (standard)
Applications	Automotive, electrical, machinery, railways
Torque Resistance	Medium to high (depending on size & material)

Nylon Insert: Acts as a locking mechanism to prevent loosening.
Material Options: Carbon steel, stainless steel (A2, A4), brass.
Finish: Zinc plated, plain, hot-dip galvanized, or self-color.
Thread Type: Metric, UNC, UNF, BSW, and custom as per requirement.
Reusability: Moderate – up to a few cycles depending on the application.
Corrosion Resistance: Excellent when made from stainless steel.

Nylon Insert Lock Nuts are available in a variety of materials and grades to suit different mechanical, environmental, and corrosion-resistance requirements.

Material	Properties	Typical Use
Carbon Steel	Strong, cost-effective, suitable for general-purpose applications	Machinery, construction
Stainless Steel A2 (304)	Excellent corrosion resistance, non-magnetic in annealed state	Outdoor, food-grade equipment
Stainless Steel A4 (316)	Superior corrosion resistance, especially against chlorides and acids	Marine, chemical, and medical uses
Brass	Good corrosion resistance, non-sparking, and electrically conductive	Electrical and plumbing applications
Alloy Steel	High strength, heat-treated for demanding environments	Automotive and aerospace

A type of locknut, known by multiple names such as nyloc nut, nylon-insert lock nut, polymer-insert lock nut, or elastic stop nut, features a nylon collar that enhances friction on the screw thread.

Material

Polyamide 6/66

Type

PA6 or PA66

Temperature Range

-40°C to +120°C

Color

Blue or White

Nylon Insert

Located at the top of the nut, the nylon insert is typically crafted from either nylon 6 or nylon 66. Its inner diameter is intentionally slightly smaller than the bolt's major diameter.

Friction Lock

As the nut is tightened, the nylon insert conforms to the bolt threads and produces a frictional force that hinders loosening.

Vibration Resistance

The friction effectively secures the nut, keeping it from loosening due to dynamic loads or vibrations.

Reusable

Although the nylon insert is reusable, it may degrade over time and compromise its locking ability.

Nut Body

Usually comprised of either carbon steel or stainless steel, these materials are chosen for their robustness and longevity.

Insert

Commonly constructed from nylon, providing both pliability and durability.

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