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Stainless Steel Castle Nut | Alloy Steel Castle Nut | Duplex Steel Castle Nut | Carbon Steel Castle Nut

CASTLE NUT

The castle nut is commonly used on applications where the nut needs to be secured from backing off. It is used with a cotter pin inserted through a hole drilled in the shaft and through the slots in the nut. Castle nuts are most common in fine thread. A more avialable substitue is the Slotted Nut  the difference being the turned down top. 
Standard finish is Plain

 

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.

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.

 

Dimensions for DIN935  Slotted up to and including M10 Castle M12 and over

DiameterPitchDepth of NutAcross FlatsWidth of slot
M50.8mm6mm8mm1.4mm
M61.0mm7.5mm10mm2.0mm
M71.0mm8.0mm11mm2.0mm
M81.25mm9.5mm13mm2.5mm
M101.5mm12mm17mm2.8mm
M121.75mm15mm19mm3.5mm
M142mm16mm22mm3.5mm
M162mm19mm24mm4.5mm
M182.5mm21mm27mm4.5mm
M202.5mm22mm30mm4.5mm
M222.5mm26mm32mm5.5mm
M243.0mm27mm36mm5.5mm
M27`3.0mm30mm41mm5.5mm
M303.5mm35mm46mm7mm
M333.5mm35mm50mm7mm
M364mm38mm55mm7mm
M394mm40mm60mm7mm
M424.5mm46mm65mm9mm
M454.5mm48mm70mm9mm
M485mm50mm75mm9mm
M525mm54mm80mm9mm
M565.5mm57mm85mm9mm
M605.5mm63mm90mm11mm
M646mm66mm95mm11mm

 

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 Castle Nut Application Industries

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

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

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