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Stainless Steel Nylon Lock Nut | Alloy Steel Nylon Lock Nut | Duplex Steel Nylon Lock Nut | Carbon Steel Nylon Lock Nut

Carbon Steel Nylon Lock Nut

A Nylon Lock Nut is a classic locking Nut with a nylon insert for stiffness & vibration resistant.Also called as Nyloc Nuts,Locking Nuts,Stiff Nuts,Prevailing Torque Nuts. These nuts are manufactured strictly as per DIN standard 985,6924 & ISO Standard 7040 depending upon the requirement.

We manufacturer fasteners with size range from M10 to M100  Hex Nuts, Heavy Hex Nut, Cap Nut, Acorn Nut, Serrated Flange Nut, Coupling Nut, Square Nut, Castle Nut, Wing Nut, Flange Lock Nut, Flex Lock Nut, High Nut, Kep Nut, Jam Nut, Nylon Lock Nut, Slotted Nut, Reversible Lock Nut, Custom Nut, T Nuts & other customized Nuts as per Client's requirement.We produce Hot Forged and Coled Formed Nuts Fasteners.

What is nyloc nut

A nyloc nut is a fastener that incorporates a nylon component to effectively lock the nut into position on the bolt. The nylon component of the nyloc nut has a smaller inside diameter than the actual nut, thereby acting to lock the nut in place by squeezing the nylon firmly around the bolt when tightened. Unlike a standard locking washer, the nyloc nut prevents the nut from loosening under vibration as the nylon is tightly wedged into the bolt threads and provides resistance to turning once tightened.

One common problem with standard nut-and-bolt fasteners is that they can become loose or even work themselves free over time and with vibration. Chemical thread-locking compounds work well at reducing the occurrence of loosening nuts, however, this can be very time-consuming and, in difficult-to-reach areas, nearly impossible. The nyloc nut allows a bolt to be tightened without fear of it loosening under nearly any condition, and typically there is no more difficulty in installing the nylon locking nut than a conventional non-locking nut. One drawback to using a nyloc nut is that the nut cannot be threaded tight by using fingers alone. The nylon insert requires that a wrench be used on the nut once the threads come into contact with the nylon inside the fastener.

There is typically a slight increase in price for a nyloc nut as compared to a standard nut, and this was once a concern as the locking nut was a single-use item. This means that once a locking nut has been used on a bolt, the nut must be discarded and a new nut used whenever the fastener is removed. Advances in the nylon formula have since made this requirement obsolete. The modern nylon-type locking nut can be reused many times without fear of failure, making the locking nut a viable option in most critical fastening areas. The test to reuse a locking nut is to turn the nut onto a bolt, and if the nylon provides resistance to turning using only fingers, the nut can be safely reused.

Even though the nylon locking nut can be reused in many applications, it remains a recommendation to use a fresh locking nut on any critical fastener connection. The slightest risk of failure warrants a ban on the reuse of the fastener in all critical applications, such as cylinder head bolts, connecting rod bolts and main bearing cap bolts. Modern nylon formulas permit the nyloc nut be used in many internal engine applications without concern.

Carbon Steel

IdentificationGrade MarkSpecificationFastenerDescriptionMaterialNominal SizeRange (in.)Mechanical Properties
Proof
Load
(psi)
Yield
Strength
Min (psi)
Tensile
Strength
Min (psi)
hhhhhhhhhhhNoGradeMarkSAE J429Grade 1Bolts,Screws,StudsLow or
Medium Carbon Steel
1/4 thru
1-1/2
33,00036,00060,000
ASTM A307Grades A&BLow Carbon
Steel
1/4 thru 4
SAE J429Grade 2Low or
Medium Carbon Steel
1/4 thru
3/4 Over 3/4 to 1-1/2
55,00033,00057,00036,00074,00060,000
hhhhhhhhhhhNoGradeMarkSAE J429Grade 4StudsMedium
Carbon Cold Drawn Steel
1/4 thru
1-1/2
100,000115,000
hhhhhhhhhhhB5ASTM A193Grade B5AISI 5011/4 Thru 480,000100,000
hhhhhhhhhhhB6ASTM A193Grade B6AISI 41085,000110,000
hhhhhhhhhhhB7ASTM A193Grade B7AISI 4140,
4142, OR 4105
1/4 thru 2-1/2Over 2-1/2 thru 4Over 4 thru 7—-105,00095,00075,000125,000115,000100,000
hhhhhhhhhhhB16ASTM A193Grade B16CrMoVa
Alloy Steel
105,00095,00085,000125,000115,000100,000
hhhhhhhhhhhB8ASTM A193Grade B8AISI 3041/4 and larger30,00075,000
hhhhhhhhhhhB8CASTM A193Grade B8CAISI 347
hhhhhhhhhhhB8MASTM A193Grade B8MAISI 316
hhhhhhhhhhhB8TASTM A193Grade B8TBolts,Screws,Studs for High-Temperature ServiceAISI 3211/4 and
larger
30,00075,000
hhhhhhhhhhhB8ASTM A193Grade B8AISI 304Strain Hardened1/4 thr 3/4Over 3/4 thru 1Over 1 thru 1-1/4Over 1-1/4 thru 1-1/2——100,00080,00065,000

50,000

125,000115,000105,00

0100,000

hhhhhhhhhhhB8CASTM A193Grade B8CAISI 347Strain Hardened
hhhhhhhhhhhB8MASTM A193Grade B8MAISI 316Strain Hardened95,00080,00065,000

50,000

110,000100,00095,00

090,000

hhhhhhhhhhhB8TASTM A193Grade B8TAISI 321Strain Hardened100,00080,00065,000

50,000

125,000115,000105,000

100,000

hhhhhhhhhhhL7ASTM A320Grade L7Bolts,Screws,Studs for Low-Temperature ServiceAISI 4140,4142 or 41451/4 thru 2-1/2 105,000125,000
hhhhhhhhhhhL7AASTM A320Grade L7AAISI 4037
hhhhhhhhhhhL7BASTM A320Grade L7BAISI 4137
hhhhhhhhhhhL7CASTM A320Grade LC7AISI 8740
hhhhhhhhhhhL43ASTM A320Grade L43AISI 43401/4 thru 4105,000125,000
hhhhhhhhhhhB8ASTM A320Grade B8Bolts,Screws,Studs for Low-Temperature ServiceAISI 3041/4 and larger30,00075,000
hhhhhhhhhhhB8CASTM A320Grade B8CAISI 347
hhhhhhhhhhhB8TASTM A320Grade B8TAISI 321
hhhhhhhhhhhB8FASTM A320Grade B8FAISI 303or 303Se
hhhhhhhhhhhB8MASTM A320Grade B8MAISI 316
hhhhhhhhhhhB8ASTM A320Grade B8AISI 3041/4 thru 3/4Over 3/4 thru 1Over 1 thru 1-1/4Over 1-1/4 thru 1-1/2——100,00080,00065,00

50,00

100,00080,00065,00

50,00

hhhhhhhhhhhB8CASTM A320Grade B8CAISI 347
hhhhhhhhhhhB8FASTM A320Grade B8FAISI 303or 303Se
hhhhhhhhhhhB8MASTM A320Grade B8MAISI 316
hhhhhhhhhhhB8TASTM A320Grade B8TAISI 321
hhhhhhhhhhhSAE J429Grade 5Bolts,Screws,StudsMedium Carbon Steel, Quenched and Tempered1/4 thru 1Over 1 to 1-1/285,00074,00092,00081,000120,000105,000
ASTM A4491/4 thru 1Over 1 to 1-1/2Over 1-1/2 thru 385,00074,000

55,000

92,00081,00058,000120,000105,00090,000
hhhhhhhhhhhSAE J429Grade 5.1SemsLow or
Medium Carbon Steel, Quenched and Tempered
No. 6thru 3/885,000120,000
hhhhhhhhhhhSAE J429Grade 5.2Bolts,Screws,StudsLow Carbon
Martensitic Steel, Quenched and Tempered
1/4 thru 185,00092,000120,000
hhhhhhhhhhhA325ASTM A325Type 1High StrengthStructural BoltsMedium
Carbon Steel, Quenched and Tempered
1/2 thru 11-1/8 thru 1-1/285,00074,00092,00081,000120,000105,000
hhhhhhhhhhhA325ASTM A325Type 2Low Carbon
Martensitic Steel, Quenched and Tempered
1/2 thru 185,00092,000120,000
hhhhhhhhhhhA325ASTM A325Type 3Atmospheric
Corrosion Resisting Steel, Quenched and Tempered
1/2 thru 11-1/8 thru 1-1/285,00074,00092,00081,000120,000105,000
hhhhhhhhhhhBBASTM A354Grade BBBolts,StudsAlloy Steel, Quenched and Tempered1/4 thru 2-1/22-3/4 thru 480,00075,00083,00078,000105,000100,000
hhhhhhhhhhhBCASTM A354Grade BC105,00095,000109,00099,000125,000115,000
hhhhhhhhhhhSAE J429Grade 7Bolts,Screws,Medium
Carbon Alloy Steel, Quenched and Tempered
4
1/4 thru
1-1/2
105,000115,000133,000
hhhhhhhhhhhSAE J429Grade 8Bolts,Screws,StudsMedium
Carbon Alloy Steel, Quenched and Tempered
1/4 thru 1-1/2120,000130,000150,000
ASTM A354Grade BDAlloy
Steel, Quenched and Tempered
4
hhhhhhhhhhhNo GradeMarkSAE J429Grade 8.1StudsMedium
Carbon Alloy or SAE 1041 Modified Elevated Temperature
Drawn Steel
1/4 thru
1-1/2
120,000130,000150,000
hhhhhhhhhhhA490ASTM A490High
Strength
Structural Bolts
Alloy
Steel, Quenched and Tempered
1/2 thru
1-1/2
120,000130,000150,000
min
170,000 max
hhhhhhhhhhhNo GradeMarkISO R898Class 4.6Bolts,Screws,StudsMedium Carbon Steel, Quenched and TemperedAll Sizesthru 1-1/233,00036,00060,000
hhhhhhhhhhhNo GradeMarkISO R898Class 5.855,00057,00074,000
8.8hhhhhhhhhhhorhhhhhhhhhhh88ISO R898Class 8.8Alloy Steel, Quenched and Tempered85,00092,000120,000
10.9hhhhhhhhhhhorhhhhhhhhhhh109ISO R898Class 10.9120,000130,000150,000

 

FASTENER IDENTIFICATION MARKING

 

GradeIdentificationMarkingSpecificationMaterialNominal SizeIn.ProofLoadStressksiHardnessRockwellSeeNote
MinMax
hhhhhhhhhhhNo MarkASTM A563
– Grade 0
Carbon
Steel
1/4 thru
1-1/2
69B55C323,4
ASTM A563
– Grade A
Carbon
Steel
1/4 thru
1-1/2
90B68C323,4
ASTM A563 – Grade BCarbon Steel1/4 thru 1120B69C323,4
over 1
thru 1-1/2
105
hhhhhhhhhhhASTM A563
– Grade C
Carbon
Steel
May be Quenchedand Tampered
1/4 thru 4144B78C385
hhhhhhhhhhhASTM A563
– Grade C3
AtmosphericCorrosionResistant SteelMay be Quenchedand Tampered1/4 thru 4144B78C385,9
hhhhhhhhhhhASTM A563
– Grade D
Carbon
Steel
May be Quenchedand Tampered
1/4 thru 4150B84C386
hhhhhhhhhhhASTM A563
– Grade DH
Carbon
Steel
Quenchedand Tampered
1/4 thru 4175C24C386
hhhhhhhhhhhASTM A563
– Grade DH3
AtmosphericCorrosionResistant Steel,Quenchedand Tampered1/4 thru 4175C24C385,9
hhhhhhhhhhhASTM A194
– Grade 1
Carbon
Steel
1/4 thru 4130B707
hhhhhhhhhhhASTM A194
– Grade 2
Medium
Carbon
Steel
1/4 thru 41501593527,8
hhhhhhhhhhhASTM A194
– Grade 2H
Medium
Carbon
Steel, Quenchedand Tempered
1/4 thru 4175C24C387
hhhhhhhhhhhASTM A194
– Grade 2HM
Medium
Carbon
Steel, Quenchedand Tempered
1/4 thru 41501592377,8
hhhhhhhhhhhASTM A194
– Grade 4
Medium
Carbon
Alloy Steel,Quenchedand Tempered
1/4 thru 4175C24C387
hhhhhhhhhhhASTM A194
– Grade 7
Medium
Carbon
Alloy Steel,Quenchedand Tempered
1/4 thru 4175C24C387
hhhhhhhhhhhASTM A194
– Grade 7M
Medium
Carbon
Alloy Steel,Quenchedand Tempered
1/4 thru 41501592377
See Note 1,210

NOTES:

  • In addition to the indicated grade marking, all grades, except A563 grades O, A and B, must be marked for manufacturer identification.
  • The markings shown for all grades of A194 nuts are for cold formed and hot forged nuts. When nuts are machined from bar stock the nut must be additionally marked with the letter ‘B’.
  • Nuts are not required to be marked unless specified by the purchaser. When marked, the identification marking shall be the grade letter O, A or B.
  • Properties shown are those of nonplated or noncoated coarse thread hex nuts.Properties shown are those of coarse thread heavy hex nuts.
  • Properties shown are those of coarse thread heavy hex nuts.
  • Properties shown are those of coarse 8-pitch thread heavy hex nuts.
  • Hardnesses are Brinell Hardness Numbers.
  • The nut manufacturer, at his option, may add other markings to indicate the use of atmospheric corrosion resistant steel.
  • Specifications —
  • STM A563 — Carbon and Alloy Steel Nuts.
  • ASTM A194/A194M — Carbon and Alloy Steel Nuts for Bolts
    for High Pressure and High Temperature Service.

 

Nut Type

Hex NutsHeavy Hex NutCap NutAcorn NutSerrated Flange Nut
Coupling NutSquare NutCastle NutWing NutFlange Lock Nut
Flex Lock NutHigh NutKep NutJam NutNylon Lock Nut
Slotted NutReversible Lock NutCustom NutT Nuts 

 

Carbon Steel Nylon Lock Nut Application Industries

Sunflex Metal Industries are engaged in manufacturing of robust quality of Carbon Steel Nylon Lock Nut. These Carbon Steel Nylon Lock Nut are widely used in the following industries:

Carbon Steel Nylon Lock Nut Mining Industries
Carbon Steel Nylon Lock Nut Transport Industries- Rail and Road
Carbon Steel Nylon Lock Nut Construction Industries / Building Systems
Carbon Steel Nylon Lock Nut Manufacturing Industries
Carbon Steel Nylon Lock Nut Agriculture Industries
Carbon Steel Nylon Lock Nut Energy Industries
Carbon Steel Nylon Lock Nut Water Industries
Carbon Steel Nylon Lock Nut Automotive Industries
Carbon Steel Nylon Lock Nut Ship Building Industries
Carbon Steel Nylon Lock Nut Nuclear Power Plant
Carbon Steel Nylon Lock Nut Paper & Pulp Industries
Carbon Steel Nylon Lock Nut Sugar Industries
Carbon Steel Nylon Lock Nut Engineering Cement Industries
Carbon Steel Nylon Lock Nut Petro-Chemical Industries
Carbon Steel Nylon Lock Nut Food Industries
Carbon Steel Nylon Lock Nut Oil & Gas Industries
Carbon Steel Nylon Lock Nut Chemical & Pharmaceutical Industries

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