Carbon Steel Fasteners

AISI 4130 Bolts

Carbon Steel Fasteners have high strength and are used for bolting oil and gas pipelines, structural joints, shipbuilding, automotives, etc. Applications which demands high strength and corrosion resistance with economic feasibility, carbon steel fasteners are often supplied with industrial PTFE (abbr. for polytetrafluoroethylene) coatings. Most carbon steel fasteners are used with Teflon® ptfe coatings. AISI 1018, 1020, 1040, 1045/CK45 are common carbon steel grades used for producing these fasteners. Industrial specifications like ASTM A36, A193, A194, A307, A354, A449, A540, A563, F1554 & SAE J429 covers high tensile carbon steel fasteners grades.

Carbon Steel is an abundantly used steel category in today’s industrial world. Its existence is merely indebted. Carbon Steel plays an important role in civil and industrial sectors. Carbon steel is categorized into three sub categories like Low Carbon Steel, Medium Carbon Steel & High Carbon Steel. Carbon steel fasteners are either cold forged or hot forged.

Types of Carbon Steel Fasteners

Carbon Steel fasteners are manufactured in following types.

Carbon Steel Fastener Grades

ASTM Specifications for Carbon Steel Bolts & Nuts

Specifications Form Grade Products
ASTM A36 Bars & Plates ... Bolts, Screws, Stud Bolts, Nuts, Washers & Bar Components
ASTM A307 Bolting Grade A, B Bolts, Screws, Stud Bolts, Nuts, Forged Components
ASTM A325 Bolting Type 1 Heavy Hex Structural Bolts
ASTM A449 Bolting Type 1, Type 2 Bolts, Screws, Stud Bolts, Threaded Rods, Nuts & Bar Components
ASTM A489 Bolting ... Lifting Eye Bolts
ASTM A540 Bolting Grade B21, B22, B23, B24, B24V Bolts, Screws, Stud Bolts, Threaded Rods, Nuts & Bar Components
ASTM F1554 Bolting Grade 36 Anchor Bolts
ASTM F3125 Bolting Type 1 Heavy Hex Bolts


Carbon Steel fasteners are exclusively used for bolting pipeline flanges, process equipments, components and other instruments operating in following sectors.