Steel Bolts And Nuts

STUD BOLTS & HEX NUTS& WASHER

Bolts Material & Grades :

Stainless Steel Bolts : AISI 302, 304, 304L,316, 316L, 310, 317, 317L, 321, 347, 410, 420,904L etc.

BOLTS

 • 18-8 Stainless Steel Hex Head Bolts

   Up to 1” Diameter and 14” Long

• 18-8 Stainless Steel Carriage Bolts

   Up to ¾” Diameter and 14” Long

• 18-8 Stainless Steel Hex Head Lag Bolts

   Up to ¾” Diameter and 10” Long

NUTS

• 18-8 Stainless Steel Finish Hex Nuts

• 18-8 Stainless Steel Nylon Lock-Nuts

• 18-8 Stainless Steel Rod Couplings

 

• 18-8 Stainless Steel Acorn Nuts

• 18-8 Stainless Steel Wing Nuts

WASHERS

• 18-8 Stainless Steel Flat Washers

   USS/SAE/AN960

• 18-8 Stainless Steel Fender Washers

• 18-8 Stainless Steel Plate Washers

• 18-8 Stainless Steel Lock Washers

• 18-8 Stainless Steel Finish Washers

• 18-8 Stainless Steel Sealing Washers

   Bonded Neoprene

SCREWS

• 18-8 Stainless Steel Tapping Screws

   Pan, Flat, Oval and Truss Head

• 316 Stainless Steel Deck Screws

• 18-8 Stainless Steel Hex Head Tapping Screws

• 410 Stainless Steel Tek Self Drilling Screws

• 410 Stainless Steel Concrete Screws

• 18-8 Stainless Steel Machine Screws

   Pan, Flat, Oval and Truss Head

ALL THREAD ROD

• 18-8 Stainless Steel Threaded Rod 6’ and 12’

• 18-8 Stainless Steel All Thread Studs

 6” and Longer

Duplex & Super Duplex Steel Bolts : ASTM / ASME A815 UNS No. S31803, UNS No. S 32205, UNS No. S 31254, UNS No. S 31550, UNS No. S 32750, and UNS No. S 32760.

Carbon Steel Bolts :A STM A307, A193.

Alloy Steel Bolts : ASTM / ASME A/SA 193 / 194 B 6, B 7/ B 7M, B 16, 2, 2HM, 2H, GR 6, B 7, B 7M

Nickel Alloy Bolts : ASTM / ASME SB 160 / 164 / 425 / 166 / 446 / 574 / 472 UNS 2200 (NICKEL 200) / UNS 2201 (NICKEL 201), UNS 4400 (MONEL 400), UNS 8825 (INCONEL 825), UNS 6600 (INCONEL 600) / UNS 6601 (INCONEL 601), UNS 6625 (INCONEL 625), UNS 10276 (HASTELLOY C 276), UNS 8020 (ALLOY 20 / 20 CB 3)

STUD BOLTS 

We supply stud bolts in alloy steel as per ASTM A 193 and A 194 grades and stud bolts in full thread and double ended from M-16 to M-100 diameter.

HEX NUTS :

We supply Hex nuts and heavy hex nuts as per the details below from 1/2" to 3" and M-12 to M-72 diameter.

WASHER：

We supply washers which include washers in carbon steel, alloy steel and stainless steel grades are from the below standard and specification

Zinc Plating

Many steel fasteners are electroplated with zinc for better corrosion resistance. Fasteners that have been zinc plated have a shiny, silvery or golden appearance, referred to as clear or yellow zinc respectively. They are fairly corrosion resistant but will rust if the coating is destroyed or if exposed to a marine environment.

Hot Dip Galvanizing

Galvanizing is another coating involving the application of a layer of zinc. Hot dip galvanizing puts the thickest possible coating on the metal, resulting in superior corrosion resistance. Due to the thickness of the coating hot dipped galvanized bolts are not compatible with other nuts. Galvanized nuts are tapped slightly larger than other nuts to accommodate this coating.

Hot dipped galvanized fasteners are frequently used outdoors, especially in coastal environments.

Chrome

Fasteners are chrome plated and polished for appearance. Chrome plating provides similar corrosion resistance to zinc plating. The main drawback of polished chrome is its high cost. If more corrosion resistance is required, stainless steel may be chrome plated, preventing any corrosion should the chrome be penetrated.

The Fastener Factory has a wide variey of Steel stud bolts，Steel hex nuts，Steel washer For all technical information including din and iso standards, measurements including head dimensions, thread length, drive type and size, please refer to our stainless steel bolts product Imformation。

Materials

Stainless Steel

Stainless steel is an alloy of low carbon steel and chromium for enhanced corrosion characteristics. Stainless steel is highly corrosion resistant for the price. Because the anti-corrosive properties are inherent to the metal, it will not lose this resistance if scratched during installation or use.

It is a common misconception that stainless steel is stronger than regular steel. In fact, due to their low carbon content, many stainless steel alloys cannot be hardened through heat treatment. Therefore, when compared to regular steel, the stainless alloys used in bolts are slightly stronger than an un-hardened (grade 2) steel but significantly weaker than hardened steel fasteners. Unless great care is taken, stainless fasteners are susceptible to seizing up during installation, a phenomenon known as galling.

Most stainless steel fasteners are much less magnetic than regular steel fasteners though some grades will be slightly magnetic.

（1）18-8 Stainless

18-8 refers to any stainless steel containing approximately 18% chromium and 8% nickel. This is the most common stainless designation for hardware. For information on 18-8 stainless steel material properties see our Material Grade Identification and Properties Chart.

（2）Stainless 316

A highly corrosion resistant grade of stainless steel. Ideal in salt water and chlorine environments. More expensive than 18-8.

（3）Stainless 410

A stainless alloy that is harder than 18-8 stainless steel, but not as resistant to corrosion.

Steel

Steel is the most common fastener material. Steel fasteners are available plain as well as with various surface treatments such as zinc plating, galvanization, and chrome plating.

Steel fasteners are commonly available in 4 grades: Grade 2, Grade 5, Grade 8, and Alloy Steel. Many other grades exist but are used far less often. Grade 2, 5, and 8 are usually plated with a slightly blue-ish or yellow zinc coating, or are galvanized, to resist corrosion.

Determining Bolt Grade

Bolts are typically marked on the head to show what grade bolt they are. For a list of the most common grade markings see our Material Grade Identification and Properties Chart. Note that, in addition to the grade marking, many bolts also have a manufacturer's mark.

Grade 2

Grade 2 is a standard hardware grade steel. This is the most common grade of steel fastener and is the least expensive. Except a possible manufacturer's mark, Grade 2 bolts have no head marking.

Grade 5 / Grade F

Grade 5 bolts are hardened to increase strength and are the most common bolts found in automotive applications. Grade 5 bolts have 3 evenly spaced radial lines on the head.

Grade F is roughly equivalent to Grade 5. Grade F nuts are used with Grade 5 bolts.

Alloy Steel

Alloy steel bolts are made from a high strength steel alloy and are further heat treated. Alloy steel bolts are typically not plated, resulting in a dull black finish. Alloy steel bolts are extremely strong but very brittle.

Silicon Bronze

Silicon bronze, often referred to simply as bronze, is an alloy made mostly of copper and tin with a small amount of silicon. Bronze is used primarily in marine environments. It is preferred over stainless in wooden boat construction and re-fastening due to its superior corrosion resistance, and over brass due to its higher strength. Bronze is similar to copper in color and is also sometimes seen in fine woodworking where it is used for its appearance. The main drawback of bronze is its high cost.

Brass

Brass is an alloy of primarily copper and zinc. Brass is highly corrosion resistant and electrically conductive. However, its use as a fastener is somewhat limited due to its relative softness. It is used primarily for its appearance.

Aluminum

Aluminum is a light, soft, corrosion resistant metal. Like stainless steel, aluminum's corrosion resistance is inherent to the material. Therefore, scratches and nicks will not effect the corrosion resistance.

Fasteners are made from a variety of aluminum alloys, with elements such as manganese, silicon, iron, magnesium, zinc, copper, and silicon being added to increase strength and melting point.

Rivets are often made from aluminum alloys in the 5000-series, which uses magnesium as the primary alloying element.

Process

Packing