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INTRODUCTION

Manufacturer and Supplier of Best Quality Fasteners Being known for the best manufacturer and exporter of a broad array of Carbon Steel Fasteners, we offer Carbon Steel Fasteners that are fabricated by our adroit professionals using supreme class raw materials as per the set industry norms. We offer Carbon Steel Fasteners in various specifications and can be custom designed as per hte clients given specificatons. Backed by a diligent team of professionals, we are engaged in offering an excellent quality range of Carbon Steel Fasteners.

With holdling years of experience in the world of Metal Market with constant quality service and customer satisfaction ,we would like to continue establishing business relations with reputed concern like yours. We assure you that you will certainly find in our products quality and rate most competitive at right time with excellent services. Your satisfaction is the award for our good quality and service.

IdentificationGrade Mark	Specification	FastenerDescription	Material	Nominal SizeRange (in.)	Mechanical Properties
IdentificationGrade Mark	Specification	FastenerDescription	Material	Nominal SizeRange (in.)	Proof Load(psi)	Yield StrengthMin (psi)	Tensile StrengthMin (psi)
NoGradeMark	SAE J429Grade 1	Bolts,Screws,Studs	Low or Medium Carbon Steel	1/4 thru 1-1/2	33,000	36,000	60,000
	ASTM A307Grades A&B		Low Carbon Steel	1/4 thru 4	—	—	60,000
	SAE J429Grade 2		Low or Medium Carbon Steel	1/4 thru 3/4 Over 3/4 to 1-1/2	55,00033,000	57,00036,000	74,00060,000
NoGradeMark	SAE J429Grade 4	Studs	Medium Carbon Cold Drawn Steel	1/4 thru 1-1/2	—	100,000	115,000
B5	ASTM A193Grade B5		AISI 501	1/4 Thru 4	—	80,000	100,000
B6	ASTM A193Grade B6		AISI 410	1/4 Thru 4	—	85,000	110,000
B7	ASTM A193Grade B7		AISI 4140, 4142, OR 4105	1/4 thru 2-1/2Over 2-1/2 thru 4Over 4 thru 7	——-	105,00095,00075,000	125,000115,000100,000
B16	ASTM A193Grade B16		CrMoVa Alloy Steel	1/4 thru 2-1/2Over 2-1/2 thru 4Over 4 thru 7	——-	105,00095,00085,000	125,000115,000100,000
B8	ASTM A193Grade B8		AISI 304	1/4 and larger	—	30,000	75,000
B8C	ASTM A193Grade B8C		AISI 347
B8M	ASTM A193Grade B8M		AISI 316
B8T	ASTM A193Grade B8T	Bolts,Screws,Studs for High-Temperature Service	AISI 321	1/4 and larger	—	30,000	75,000
B8	ASTM A193Grade B8		AISI 304Strain Hardened	1/4 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
B8C	ASTM A193Grade B8C		AISI 347Strain Hardened			100,00080,00065,000 50,000	125,000115,000105,00 0100,000
B8M	ASTM A193Grade B8M		AISI 316Strain Hardened			95,00080,00065,000 50,000	110,000100,00095,00 090,000
B8T	ASTM A193Grade B8T		AISI 321Strain Hardened			100,00080,00065,000 50,000	125,000115,000105,000 100,000
L7	ASTM A320Grade L7	Bolts,Screws,Studs for Low-Temperature Service	AISI 4140,4142 or 4145	1/4 thru 2-1/2	—	105,000	125,000
L7A	ASTM A320Grade L7A		AISI 4037
L7B	ASTM A320Grade L7B		AISI 4137
L7C	ASTM A320Grade LC7		AISI 8740
L43	ASTM A320Grade L43		AISI 4340	1/4 thru 4	—	105,000	125,000
B8	ASTM A320Grade B8	Bolts,Screws,Studs for Low-Temperature Service	AISI 304	1/4 and larger	—	30,000	75,000
B8C	ASTM A320Grade B8C		AISI 347
B8T	ASTM A320Grade B8T		AISI 321
B8F	ASTM A320Grade B8F		AISI 303or 303Se
B8M	ASTM A320Grade B8M		AISI 316
B8	ASTM A320Grade B8		AISI 304	1/4 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
B8C	ASTM A320Grade B8C		AISI 347
B8F	ASTM A320Grade B8F		AISI 303or 303Se
B8M	ASTM A320Grade B8M		AISI 316
B8T	ASTM A320Grade B8T		AISI 321
	SAE J429Grade 5	Bolts,Screws,Studs	Medium Carbon Steel, Quenched and Tempered	1/4 thru 1Over 1 to 1-1/2	85,00074,000	92,00081,000	120,000105,000
	ASTM A449	Bolts,Screws,Studs	Medium Carbon Steel, Quenched and Tempered	1/4 thru 1Over 1 to 1-1/2Over 1-1/2 thru 3	85,00074,000 55,000	92,00081,00058,000	120,000105,00090,000
	SAE J429Grade 5.1	Sems	Low or Medium Carbon Steel, Quenched and Tempered	No. 6thru 3/8	85,000	—	120,000
	SAE J429Grade 5.2	Bolts,Screws,Studs	Low Carbon Martensitic Steel, Quenched and Tempered	1/4 thru 1	85,000	92,000	120,000
A325	ASTM A325Type 1	High StrengthStructural Bolts	Medium Carbon Steel, Quenched and Tempered	1/2 thru 11-1/8 thru 1-1/2	85,00074,000	92,00081,000	120,000105,000
A325	ASTM A325Type 2		Low Carbon Martensitic Steel, Quenched and Tempered	1/2 thru 1	85,000	92,000	120,000
A325	ASTM A325Type 3		Atmospheric Corrosion Resisting Steel, Quenched and Tempered	1/2 thru 11-1/8 thru 1-1/2	85,00074,000	92,00081,000	120,000105,000
BB	ASTM A354Grade BB	Bolts,Studs	Alloy Steel, Quenched and Tempered	1/4 thru 2-1/22-3/4 thru 4	80,00075,000	83,00078,000	105,000100,000
BC	ASTM A354Grade BC	Bolts,Studs	Alloy Steel, Quenched and Tempered	1/4 thru 2-1/22-3/4 thru 4	105,00095,000	109,00099,000	125,000115,000
	SAE J429Grade 7	Bolts,Screws,	Medium Carbon Alloy Steel, Quenched and Tempered ⁴	1/4 thru 1-1/2	105,000	115,000	133,000
	SAE J429Grade 8	Bolts,Screws,Studs	Medium Carbon Alloy Steel, Quenched and Tempered	1/4 thru 1-1/2	120,000	130,000	150,000
	ASTM A354Grade BD	Bolts,Screws,Studs	Alloy Steel, Quenched and Tempered ⁴	1/4 thru 1-1/2	120,000	130,000	150,000
No GradeMark	SAE J429Grade 8.1	Studs	Medium Carbon Alloy or SAE 1041 Modified Elevated Temperature Drawn Steel	1/4 thru 1-1/2	120,000	130,000	150,000
A490	ASTM A490	High Strength Structural Bolts	Alloy Steel, Quenched and Tempered	1/2 thru 1-1/2	120,000	130,000	150,000 min170,000 max
No GradeMark	ISO R898Class 4.6	Bolts,Screws,Studs	Medium Carbon Steel, Quenched and Tempered	All Sizesthru 1-1/2	33,000	36,000	60,000
No GradeMark	ISO R898Class 5.8		Medium Carbon Steel, Quenched and Tempered		55,000	57,000	74,000
8.8or88	ISO R898Class 8.8		Alloy Steel, Quenched and Tempered		85,000	92,000	120,000
10.9or109	ISO R898Class 10.9		Alloy Steel, Quenched and Tempered		120,000	130,000	150,000

FASTENER IDENTIFICATION MARKING

GradeIdentificationMarking	Specification	Material	Nominal SizeIn.	ProofLoadStressksi	HardnessRockwell		SeeNote
GradeIdentificationMarking	Specification	Material	Nominal SizeIn.	ProofLoadStressksi	Min	Max	SeeNote
No Mark	ASTM A563 – Grade 0	Carbon Steel	1/4 thru 1-1/2	69	B55	C32	3,4
	ASTM A563 – Grade A	Carbon Steel	1/4 thru 1-1/2	90	B68	C32	3,4
	ASTM A563 – Grade B	Carbon Steel	1/4 thru 1	120	B69	C32	3,4
	ASTM A563 – Grade B	Carbon Steel	over 1 thru 1-1/2	105	B69	C32	3,4
	ASTM A563 – Grade C	Carbon SteelMay be Quenchedand Tampered	1/4 thru 4	144	B78	C38	5
	ASTM A563 – Grade C3	AtmosphericCorrosionResistant SteelMay be Quenchedand Tampered	1/4 thru 4	144	B78	C38	5,9
	ASTM A563 – Grade D	Carbon SteelMay be Quenchedand Tampered	1/4 thru 4	150	B84	C38	6
	ASTM A563 – Grade DH	Carbon SteelQuenchedand Tampered	1/4 thru 4	175	C24	C38	6
	ASTM A563 – Grade DH3	AtmosphericCorrosionResistant Steel,Quenchedand Tampered	1/4 thru 4	175	C24	C38	5,9
	ASTM A194 – Grade 1	Carbon Steel	1/4 thru 4	130	B70	—	7
	ASTM A194 – Grade 2	Medium CarbonSteel	1/4 thru 4	150	159	352	7,8
	ASTM A194 – Grade 2H	Medium CarbonSteel, Quenchedand Tempered	1/4 thru 4	175	C24	C38	7
	ASTM A194 – Grade 2HM	Medium CarbonSteel, Quenchedand Tempered	1/4 thru 4	150	159	237	7,8
	ASTM A194 – Grade 4	Medium CarbonAlloy Steel,Quenchedand Tempered	1/4 thru 4	175	C24	C38	7
	ASTM A194 – Grade 7	Medium CarbonAlloy Steel,Quenchedand Tempered	1/4 thru 4	175	C24	C38	7
	ASTM A194 – Grade 7M	Medium CarbonAlloy Steel,Quenchedand Tempered	1/4 thru 4	150	159	237	7
See Note 1,2	10

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.

SAE J429 Grade 1, ASTM A307 Grades A&B, SAE J429 Grade 2, SAE J429 Grade 4, ASTM A193 Grade B5, ASTM A193 Grade B6, ASTM A193 Grade B7, ASTM A193 Grade B16, ASTM A193 Grade B8, ASTM A193 Grade B8C, ASTM A193 Grade B8M, ASTM A193 Grade B8T, ASTM A193 Grade B8, ASTM A193 Grade B8C, ASTM A193 Grade B8M, ASTM A193 Grade B8T, ASTM A320 Grade L7, ASTM A320 Grade L7A, ASTM A320 Grade L7B, ASTM A320 Grade LC7, ASTM A320 Grade L43, ASTM A320 Grade B8, ASTM A320 Grade B8C, ASTM A320 Grade B8T, ASTM A320 Grade B8F, ASTM A320 Grade B8M, ASTM A320 Grade B8, ASTM A320 Grade B8C, ASTM A320 Grade B8F, ASTM A320 Grade B8M, ASTM A320 Grade B8T, SAE J429 Grade 5, ASTM A449, SAE J429 Grade 5.1, SAE J429 Grade 5.2, ASTM A325 Type 1, ASTM A325 Type 2, ASTM A325 Type 3, ASTM A354 Grade BB, ASTM A354 Grade BC, SAE J429 Grade 7, SAE J429 Grade 8, ASTM A354 Grade BD, SAE J429 Grade 8.1, ASTM A490, ISO R898 Class 4.6, ISO R898 Class 5.8, ISO R898 Class 8.8, ISO R898 Class 10.9, ASTM A563, – Grade 0, ASTM A563, – Grade A, ASTM A563 – Grade B, ASTM A563, – Grade C, ASTM A563, – Grade C3, ASTM A563, – Grade D, ASTM A563, – Grade DH, ASTM A563, – Grade DH3, ASTM A194, – Grade 1, ASTM A194, – Grade 2, ASTM A194, – Grade 2H, ASTM A194, – Grade 2HM, ASTM A194, – Grade 4, ASTM A194, – Grade 7, ASTM A194, – Grade 7M

Carbon Steel Fasteners Application Industries

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

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