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Carbon Steel Acorn Nut

Acorn Nuts/Doomed Cap Nut

nut As name suggests, Acorn Nut got its name from from its shape. It is also called as doomed cap nut which prevents its contact from the external threads.

We produce premium quality Nuts from various metals & metal alloys with ASTM/ASME/DIN Standards & Specifications.We produce different types of nuts hot forged cold formed nuts in almost all shapes & sizes.We also provide passivation,quality coating further processing as per client's 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.

The acorn nut is a type of fastener which gets its name from its shape. Acorn nut is its common name and it is also called a crown hex nut, blind nut, cap nut or domed cap nut. It is a nut that has a domed top to cover the threads. This is to prevent contact with the external thread to protect the threads or protect other things the threads would rub against. In addition the dome gives a more finished appearance. It is usually made of brass, steel, stainless steel (low carbon content) or nylon. It can also be chrome plated and given a mirror finish.

There are two types of acorn nuts. One is low, or the standard acorn nut. The other is the high acorn nut. The high acorn nut is wider and higher and will protect extra long studs. There are also self-locking acorn nuts that have distorted threads in the hex area to create a tight friction fit to prevent the nut from vibrating loose.

There are standards governing the manufacture of acorn nuts. One is Society of Automotive Engineers (SAE) Standard J483, High and Low Crown (Blind, Acorn) Hex Nuts. Another is Deutsches Institut für Normung (DIN) 1587, Hexagon Domed Cap Nuts.

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 Acorn Nut Application Industries

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

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

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