Understanding The Unique Features Of Cross Recessed Pan Head Screws

Cross-recessed pan head tapping screws are threaded fasteners with a coarse thread and a cross-recessed drive head. They are suitable for use in unthreaded holes and can be driven with a Phillips screwdriver. They are also known as sheet metal screws and can be used for fastening objects to thin metal, wood, or plastic. These screws are available in various types, including Type AB thread forming, Types B and BP thread forming, and Types BF and BT thread cutting. Type I cross-recessed pan head tapping screws are manufactured by companies like HASM North America and Sales Systems Ltd. HASM offers these screws in nominal diameters ranging from 1/8 to 3 (M3 to M80), while Sales Systems Ltd provides specific dimensions for their Type I screws, such as a 0.116 head diameter for a No. 0 screw and a 0.987 head diameter for a 1/2 screw.

Phillips Drive, Cross Recessed, Type 4, AB Shape

The Phillips Drive, Cross Recessed, Type 4, AB Shape screws are available in a range of materials and finishes, including stainless steel, trivalent black, trivalent white, chromate plating, German brown plating, tin cobalt, nickel plating, bright chromate plating, and other special shapes.

Type I Cross Recessed Pan Head Tapping Screw, with 0.116 Head Dia

Type I Cross Recessed Pan Head Tapping Screws are used in a variety of applications, including chemical processing, aerospace, oil & gas, and marine industries. They are available in various materials, such as stainless steel, alloy steel, and titanium. The dimensions of these screws are standardised, with the diameter of the body being within a specific range relative to the thread size.

HASM North America is a manufacturer and supplier of Type I Cross Recessed Pan Head Screws, offering custom and standard options. They produce these screws using cold heading and hot forming technologies, with diameters ranging from 1/8” to 3” (M3 to M80). HASM provides a comprehensive range of services, including engineering, R&D, prototyping, custom manufacturing, precision processing, and testing. Their materials are sourced from reputable foundries worldwide, ensuring high-quality standards.

The dimensions of Type I Cross Recessed Pan Head Screws are standardised and specified by organisations like ASME, ANSI, ASTM, and DIN. These standards cover various aspects, including the length of the thread, the diameter of the body, and the material used. For example, the ASME standard specifies that the thread length of screws with nominal lengths equal to or shorter than three diameters should have full-form threads extending within one pitch of the bearing surface of the head.

Type I Cross Recessed Pan Head Tapping Screws are available in different thread types, including Type A, Type AB, and Type B. These thread types determine the compatibility of the screw with the tapped hole or nut. The specific thread type is usually chosen based on the application requirements and industry standards.

Type I Cross Recessed Pan Head Screw Dimensions

Type I Cross Recessed Pan Head Screws are available in a range of nominal diameters, ranging from 1/8” to 3” (M3 to M80). They are manufactured using cold heading and hot forming technologies.

The dimensions of Type I Cross Recessed Pan Head Screws are specified in standards such as ASME B 18.6.3 (T18-I/T19-IA) - 2013, ASTM F837, and ASTM F468. These standards provide guidelines for the diameter of the body, length of the thread, and material specifications.

The diameter of the body for machine screws should not be less than the Class 2A thread minimum pitch diameter and should not exceed the basic major diameter of the thread. For screws with nominal lengths equal to or shorter than three diameters, full-form threads should extend up to one pitch (thread) from the bearing surface of the head. Nominal lengths greater than three diameters but up to and including 1-1/8 inches should have full-form threads within two pitches (threads) of the bearing surface. Longer screws should have a minimum length of full-form thread of 1 inch, unless otherwise specified.

The thread length for sizes No.6 and smaller follows similar guidelines to the general rule, with screws of nominal lengths equal to or shorter than three diameters having full-form threads within one pitch (thread) of the bearing surface. Nominal lengths greater than three diameters but up to and including 2 inches should have full-form threads within two pitches, and longer screws should have a minimum length of full-form thread of 1.5 inches unless otherwise specified.

The material used for Type I Cross Recessed Pan Head Screws can vary, including non-heat-treated low carbon steel (such as 1006 through 1038) and low or medium carbon steel (such as 1018 through 1038) when hardened machine screws are specified.

Specific dimensions for Type I Cross Recessed Pan Head Screws can be found in tables provided by manufacturers and standards organizations. These tables typically list the nominal size or basic screw diameter, along with maximum and minimum values for various dimensions of the screw head, such as the maximum head diameter (Max. (A)), maximum head height (Max. (H)), minimum head height (Min. (H)), and reference values (Ref. (M)).

Type I Cross Recessed Pan Head Screw Materials

Type I Cross Recessed Pan Head Screws are manufactured from a variety of materials, including:

Hastelloy

Hastelloy is a nickel-based alloy that offers excellent resistance to corrosion and high-temperature stability. The specific grades used for Type I Cross Recessed Pan Head Screws include:

• Hastelloy® C-276
• Hastelloy® C-22
• Hastelloy® B-2
• Hastelloy® G-30

Monel

Monel is a nickel-copper alloy that provides superior strength and corrosion resistance, especially in marine environments. The grades used for these screws are:

• Monel® 400
• Monel® K-500

Inconel

Inconel is a superalloy composed primarily of nickel, chromium, and iron. It exhibits exceptional strength, corrosion resistance, and oxidation resistance at high temperatures. The grades used for Type I screws include:

• Inconel® 600
• Inconel® 601
• Inconel® 625
• Inconel® 718

Incoloy

Incoloy is another superalloy with nickel, iron, and chromium as its main components. It offers good strength and corrosion resistance in harsh environments. The grades used are:

• Incoloy® 800H
• Incoloy® 800HT
• Incoloy® 825
• Incoloy® 925

Titanium

Titanium is a strong, lightweight metal with excellent corrosion resistance. It is often used in aerospace and medical applications. The grades used for these screws include:

• Titanium Grade 2
• Titanium Grade 5
• Titanium Grade 7
• Titanium Grade 23

Duplex Stainless Steel

Duplex stainless steel offers superior strength and corrosion resistance compared to conventional stainless steels. It has a two-phase microstructure, consisting of ferrite and austenite. The grades used for Type I screws are:

• Duplex 2205
• Super Duplex 2507
• Super Duplex S32750
• Duplex S31803
• Duplex S32205

Stainless Steel

Stainless steel is an iron-based alloy with a minimum of 10.5% chromium, known for its corrosion and temperature resistance. The specific grades used for Type I Cross Recessed Pan Head Screws include:

• A-286 Stainless Steel
• 310S Stainless Steel
• 317L Stainless Steel
• 321 Stainless Steel
• 904L Stainless Steel
• Nitronic® 60

In addition to these materials, Type I Cross Recessed Pan Head Screws can also be made from zirconium, nickel, and various other steel alloys. The specific grade and material chosen depend on the intended application and the desired material properties.

Type I Cross Recessed Pan Head Screw Applications

Type I Cross Recessed Pan Head Screws are used in a wide range of applications across various industries. HASM, a manufacturer and supplier of these screws, serves markets such as chemical processing, semiconductor, power generation, aerospace, oil and gas, pharmaceutical, food and beverage, marine, pulp and paper, petrochemical and refining, air pollution control, and water treatment.

These screws are available in nominal diameters ranging from 1/8” to 3” (M3 to M80) and are offered in both USCS/Imperial and metric sizes. They are manufactured using cold heading and hot forming technologies and can be made from various materials, including Hastelloy, Monel, Inconel, Incoloy, Titanium, Duplex, and Super Duplex alloys.

HASM's capabilities include engineering, R&D, prototyping, custom manufacturing, precision processing, and testing. The company maintains a large inventory of fasteners, enabling them to quickly select, package, and expedite orders for their customers worldwide.

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