What are screw grades?

What are screw grades?

The grade of a bolt determines the maximum amount of stress (tensile strength) that the bolt can handle. Tensile strength is the amount of pull the bolt can withstand before breaking. The method used for tightening the bolt is also dependent upon the grade of the bolt.

What grade are allen head bolts?

In terms of tensile strength, a grade two hex head cap screw can handle between 60,000 to 74,000 pounds of pressure per square inch (psi), a grade five handles 105,000 to 120,000 psi, and a grade eight should be able to manage 150,000 psi.

Is 1363 a material grade?

IS 1363 was originally published in 1960 and first revised in 1967. Subsequent to the publication of 1967 edition, many changes had been agreed upon at international level which have been reflec~ed in IS 1367 series of standards covering ‘Technical supply conditions for threaded steel fasteners’.

Is grade C the same as grade 8?

Grade C. Grade C is a thru-hardened medium carbon zinc plated alloy steel. No head markings (manufacturers mark may also be included). Finish is equivalent in strength to Grade 8 but without the yellow color.

What is a grade C nut?

C. This nut grade denotation is for nuts that are used in heavy construction. They are marked with three curved lines around the central hole. This grade meets ASTM A563 specifications and is commonly used with ASTM A325 and ASTM A354 bolts.

Is 1363 a hex bolt?

IS 1363 (Part 1):2019 /ISO 4016:2011 specifies the characteristics of Hexagon Head Bolts with thread size from M5 upto and including M64 of product grade C. Also Bolts may be of different property classes as specified in IS 1363 (Part 1): 2019 / ISO 4016:2011. 2.

Is Grade C same as grade 8?

What are Grade A hex nuts?

Grade-A nuts are used with low-carbon heavy hex bolts. Grade-C nuts are used with A-325 structural bolts. Grade-2H nuts are recommended for use with bolts in high-pressure and high-temperature service. Grade-DH nuts are recommended for use with A-490, Type-1 structural bolts.

What size is a 1367 hex bolt?

Hexagonal MS Full Thread & Half Thread Hex Bolts IS 1367 grade 4.6/5.6, Size: 4mm- 64mm, 50 Kg.

Is 1367 a grade C?

The IS 1367 Grade 8.8 specification covers carbon steel bolts and studs ranging from M-6 to M-39 diameter. We use high carbon steel material and high alloy steel raw materials to achieve the required properties in this standard.

What is a grade 4.8 bolt?

ASTM F568 Specification covers Grade 4.8 Bolts/Screws/Studs manufactured from Low or medium carbon Alloy Steel with fully or partiall annealed condition in size range of M5 upto M100 & minimum Tensile Strength of 400Mpa.

What grade bolt is best for shear strength?

Grade 8 bolts exhibit greater tensile, yield, and shear strength as well as greater fatigue resistance and, just as important, are capable of greater torque specs and therefore much greater pre-load and clamping strength.

Is grade C the same as Grade 8?

What is a Grade B bolt?

Grade B is a heat treated carbon steel bolting material with minimum tensile requirement between 60 to 100 ksi and hardness range from 121 to 212 BHN. ASTM A307 specification covers requirements for chemical composition, mechanical properties, hardness, heat-treatment and recommended nuts-washers for Grade B Bolts.