Standard Parts

Appearance	Grade of Material	Marking	Nominal Size Range	Proof Load (PSI)	Yield Strength (Min. PSI)	Tensile Strength (Min. PSI)
	Grade 2	No Marking	1/4" - 3/4" 3/4" - 1 1/2"	55,000 33,000	57,000 36,000	74,000 60,000
	Grade 5	3 Radial Lines	1/4" - 1" 1" - 1 1/2"	85,000 74,000	92,000 81,000	120,000 105,000
	Grade 8	6 Radial Lines	1/4" - 1 1/2"	120,000	130,000	150,000
	18-8 & 316 Stainless	No Standard Marking			45,000 minimum	85,000 minimum
	A235 Structural Bolts	A325	85,000 74,000		92,000 81,000	120,000 105,000

Metric Parts

Appearance	Class of Material	Marking	Nominal Size Range	Proof Load (MPA*/PSI)	Yield Strength (MPA*/PSI)	Tensile Strength (MPA*/PSI)
	Class 8.8	8.8	<16mm 16mm - 72 mm	580 / 84,100 600 / 87,000	640 / 92,800 660 / 95,700	800 / 116,000 830 / 120,000
	Class 10.9	10.9	5mm - 100mm	830 / 120,350	940 / 136,300	1040 / 150,800

Proof Load - is referred to the amount of tensile stress that a bolt withstands without any permanent deformation.

Yield Strength - is the amount of tensile stress need for a permanent deformation on a bolt.

Tensile Strength - is referred to as the maximum amount of pull apart that can take place before the break or fracturing of a bolt.

Our grade options in the standard categories –

The garde options are in following categories –