Nylock Nuts Applications & Specifications

By Author: Jeeten Gupta
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A Nyloc Nut is a kind of locknut with a nylon collar that increases friction on the screw thread. The Nyloc nut is an economic locking nut and ideal in applications where vibration or motion could loosen or undo the nut. This nut uses a plastic/nylon insert located towards the top of the nut, reducing its inner diameter, which then deforms over the mating thread. This captures the bolt or screw, providing a locking feature causing resistance or prevailing torque – keeping the nut locked in position and resistant to vibration.
 
How to Tighten Nylock Nuts
 
When tightening screws into Nylock Nuts the force required to tighten the screws will double, when the screw reaches the Nylon in the nut. You must keep on tightening and you will see the end of the screw come through the end of the nut. Tighten with your full strength.
Nylock Nuts Uses
 
The Nylock nut is an economic locking nut and ideal in applications where vibration ...
... or motion could loosen or undo the nut. The nut can also be used to assist sealing the bolt thread against seepage of oil, water, petrol, paraffin and other liquids

Light Poles
Elevators
Lifting applications(wires,etc)
Frame Applications
Construction
Buildings
Furniture
Pipelines
Industries and many other

 
Application of Nylock Nuts
The insert of this nut is positioned at the end of the nut and its inner diameter is bit smaller than the entire diameter of the screw. The nuts is applied in two ways they are as follows. Firstly, the nut pushes the end part of the screw threads against the head of the nut threads, thereby enhancing the friction between the two. Secondly, the nylon component employs a compact force against the rivet itself.
 
Nylock Nuts Specifications
The nylon component of the nyloc nut has a smaller inside diameter than the actual nut, thereby locking the fastener in place by gripping the nylon firmly around the bolt when fastened. Unlike a common locking washer, this particular metal piece stops the nut from loosening due to vibration, as the nylon is firmly wedged into the threads, thereby offering enough resistance to movement.
 
Dimensions of stainless steel nylock nuts

Type

Grades

European Number

ASTM grade

UNS

British standard

DIN

SS Nylcok Nuts

304

1.4301

ASTM A 193 Gr B8

S 30400

BS 970

X 5CrNi1810

SS Nylcok Nuts

304 L

1.4306

ASTM A 320 Ge B8

S 30403

BS 970

X 2CrNi1911

SS Nylcok Nuts

316

1.4401

ASTM A 193 Gr B8M

S 31600

BS 970

X 5 CrNiMo 17 13 2

SS Nylcok Nuts

316 L

1.4404

ASTM A 320 Ge B8M

S 31603

BS 970

X 2 CrNiMo 17 13 2

SS Nylcok Nuts

310

1.4841

ASTM A 479

S 31000

BS 970

X 12 CrNi 25 21

SS Nylcok Nuts

310 S

1.4845

S 31008

BS 970

X 12 CrNi 25 21

SS Nylcok Nuts

410

1.4006

S 41000

BS 970

X 10Cr13

SS Nylcok Nuts

431

1.4057

S 43100

BS 970

X 20CrNi172

SS Nylcok Nuts

316S31

1.4401

ASTM A 193 Gr B8M

S 31600

BS 970

X 5 CrNiMo 17 12 2

 
Stainless Steel Nylock Nuts Design
Stainless Steel Nylock Nuts mainly has a wide variety of designs. Depending on the use of the nut the shape and other features are designed. The purpose of these designs is that the nuts are useful for the bolts that will be used to tighten them. For instance, in some cases the square nuts are used to tighten the parts with the square bolts. Each nuts fastener has a different specification and design. Each nuts fastener also has a different use for which they are designed. Such as Hex Nuts, it has a shape designed in the shape of a 'Hex' from which its name derives.
 
More Resources:

A Quick guide to Stainless steel hex nuts
Stainless Steel cage nuts Uses and Applications
Dome Nuts Design