Astm F568 Grade 8.8.3 A Fasteners

Astm F568 Grade 8.8.3 A Fasteners Specification

Astm F568 Grade 8.8.3 A Fasteners Properties

Chemical Properties
C	Mn	P	S	Si	Cr	Ni	Cu
0.31-0.42	0.86-1.24	0.045 Max	0.055 Max	0.13-0.37	0.42-0.68	0.22-0.48	0.22-0.48

Mechanical Properties
Yeild strength	Tensile strength	Elongation	Reduction	Hardness
Mpa	Mpa	%	%	HRC
min	min	min	min
660	830	12	35	23-34

Proof Load Values, kN
Nominal Product Diameter & Thread Pitch
	M20 X 2.5	M22 X 2.5	M24 X 3	M27 X 3	M30 X 3.5	M36 X 4
Method 1	147	182	212	275	337	490
Method 2	162	200	233	303	370	539

	M42 X 4.5	M48 X 5	M56 X 5.5	M64 X 6	M72 X 6	M80 X 6
Method 1	672	882	1220	1610	2050	2600
Method 2	730	970	1340	1790	2280	2860

Heat Treatment
Quenched & Tempered @ 425°C

Equivalent Designation
UNS
EN number
EN Name
W.Nr.
SS
AFNOR

Cold Forged Fasteners, Hot Forged Fastener, C-Machined Components / Fasteners, CNC Machined Components / Fasteners, Custom Machined Components / Fasteners, Threaded Components / Fasteners, Non-Threaded Components / Fasteners, Bar Stock Machined Components / Fasteners.

Metric Range from M1.0 to M100 and Imperial Range from 1/16 inch to 4 inch.

Coarse, Fine, UNC, UNF, UN, BSW, Acme Threads with Half Thread, Full Thread & Double End Thread Configuration.

Hexagon Bolts

ANSI B18.2.1
ANSI B18.2.3.1M
DIN 931
DIN 933
BS 1768
UNI 5731
UNI 5737
UNI 5739
ISO 4014
ISO 4017
BS 1769
BS 3692

Socket/Slotted Set Screws

DIN 913
DIN 914
DIN 915
DIN 916
DIN 551
DIN 553
DIN 438
BS 4168

Socket/Slotted Countersunk Screws

DIN 963
DIN 7991
BS 4168
BS 1981
BS 483
BS 2470

Socket Cap Screws

ANSI B18.3
B18.3.1M
DIN 912
DIN 6912
DIN 7984
ANSI B18.3
ISO 4762
UNI 5931
BS 2470
BS 4168

Stud Bolts

ASME B18.2.1
DIN 976
DIN 938
DIN 939
DIN 2510
BS 4439
BS 2693
BS4882

Nuts

ANSI B18.2.2
ANSI B18.2.4.6M
DIN 934
DIN 936
BS 1768
BS 1769
BS 1083
BS 3692
ISO 4032
ISO 4033
ISO 4035
UNI 5587
UNI 5588
UNI 5589

Washers

ASME B18.22.1
ASTM F436
ISO 7089
DIN 125
DIN 9021
BS 4320
BS 3410
DIN 127
BS 4464
BS 1802
UNI 6952

Half Threaded Studs Bolts

Tap End Studs

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Astm F568 Grade 8.8.3 A Fasteners