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1. Standard Slot Sizes
2. Standard Keyhole Slot Dimensions
3. Standard Keyway Slot Dimensions
4. Standard Key Slot Dimensions
5. Standard Slot Dimensions
6. Standard Parking Slot Dimensions

• The dimensions must also follow particular specifications separate from the standard measurements. To account for wheelchairs and other equipment, handicap parking spaces will typically need to be a minimum of 14 feet wide.
• I see the basic M-LOK slot dimensions are available on the web. Where are the dimensions for the M-LOK T-Nut? A: The M-LOK T-Nut is currently under review by the US State Dept to determine its ITAR classification. Until then, dimensioned drawings of the nut will be restricted to verified US citizens, but are available free to all qualified.

American National Standard Machine Screws and Machine Screw Nuts

This Standard ANSI B18.6.3 covers both slotted and recessed head machine screws. Dimensions of various types of slotted machine screws, machine screw nuts, and header points are given in Tables 1 through 12. The Standard also covers flat trim head, oval trim head and drilled fillister head machine screws and gives cross recess dimensions and gaging dimensions for all types of machine screw heads. Information on metric machine screws B18.6.7M is given beginning on page 1708.

Threads

I measured the T-slots on my table and got these numbers: Width at top of T-slot:.5580' - this is just slightly less than 9/16'. Width at bottom of T-slot:.9665 - this comes out to about 31/32'. There are three sets I am looking at from Enco. 1/2' Slot size, 3/8' studs. Generally, mid-range and high-end graphics cards from AIB partners come with 2.2, 2.3 and 2.5 slot design with custom coolers. 2.2 slot graphics card is around 42mm wide, 2.3 slot graphics card is around 46mm wide and 2.5 slot graphics card has a width of around 50mm to 53mm. 2.2 Slot / 2.3 Slot Graphics Card.

Except for sizes 0000, 000, and 00, machine screw threads may be either Unified Coarse (UNC) and Fine thread (UNF) Class 2A (see American Standard for Unified Screw Threads starting on page 1865) or UNRC and UNRF Series, at option of manufacturer. Thread dimensions for sizes 0000, 000, and 00 are given in Table 7 on page 1698.

Threads for hexagon machine screw nuts may be either UNC or UNF, Class 2B, and for square machine screw nuts are UNC Class 2B.

Length of Thread

Machine screws of sizes No. 5 and smaller with nominal lengths equal to 3 diameters and shorter have full form threads extending to within 1 pitch (thread) of the bearing surface of the head, or closer, if practicable. Nominal lengths greater than 3 diameters, up to and including 1 1⁄8 inch, have full form threads extending to within two pitches (threads) of the bearing surface of the head, or closer, if practicable. Unless otherwise specified, screws of longer nominal length have a minimum length of full form thread of 1.00 inch. Machine screws of sizes No. 6 and larger with nominal length equal to 3 diameters and shorter have full form threads extending to within 1 pitch (thread) of the bearing surface of the head, or closer, if practicable. Nominal lengths greater than 3 diameters, up to and including 2 inches, have full form threads extending to within 2 pitches (threads) of the bearing surface of the head, or closer, if practicable. Screws of longer nominal length, unless otherwise specified, have a minimum length of full form thread of 1.50 inches.

Table 1. Square and Hexagon Machine Screw Nuts ANSI B18.6.3-1972 (R1991)

All dimensions in inches. Hexagon machine screw nuts have tops flat and chamfered. Diameter of top circle should be the maximum width across flats within a tolerance of minus 15 percent. Bottoms are flat but may be chamfered if so specified. Square machine screw nuts have tops and bottoms flat without chamfer.

Diameter of Body

The diameter of machine screw bodies is not less than Class 2A thread minimum pitch diameter nor greater than the basic major diameter of the thread. Cross-recessed trim head machine screws not threaded to the head have an 0.062 in. minimum length shoulder under the head with diameter limits as specified in the dimensional tables in the standard.

Designation

Machine screws are designated by the following data in the sequence shown: Nominal size (number, fraction, or decimal equivalent); threads per inch; nominal length (fraction or decimal equivalent); product name, including head type and driving provision; header point, if desired; material; and protective finish, if required. For example:

• ¼ - 20 × 1 ¼ Slotted Pan Head Machine Screw, Steel, Zinc Plated
• 6 - 32 × ¾ Type IA Cross Recessed Fillister Head Machine Screw, Brass

Machine screw nuts are designated by the following data in the sequence shown: Nominal size (number, fraction, or decimal equivalent); threads per inch; product name; material; and protective finish, if required. For example:

• 10 - 24 Hexagon Machine Screw Nut, Steel, Zinc Plated
• 0.138 - 32 Square Machine Screw Nut, Brass

Table 2. American National Standard Slotted 100-Degree Flat Countersunk Head Machine Screws ANSI B18.6.3-1972 (R1977)

^a When specifying nominal size in decimals, zeros preceding the decimal point and in the fourth decimal place are omitted.

All dimensions are in inches.

Table 3. American National Standard Slotted Flat Countersunk Head and Close Tolerance 100-Degree Flat Countersunk Head Machine Screws ANSI B18.6.3-1972 (R1991)

^a When specifying nominal size in decimals, zeros preceding the decimal point and in the fourth decimal place are omitted.

^b These lengths or shorter are undercut.

^c May be rounded or flat.

All dimensions are in inches.

Table 4. American National Standard Slotted Undercut Flat Countersunk Head and Plain and Slotted Hex Washer Head Machine Screws ANSI B18.6.3-1972 (R1991)

^a When specifying nominal size in decimals, zeros preceding the decimal point and in the fourth decimal place are omitted.

^b These lengths or shorter are undercut.

^a Unless otherwise specified, hexagon washer head machine screws are not slotted.

All dimensions are in inches.

Table 5. American National Standard Slotted Truss Head and Plain and Slotted Hexagon Head Machine Screws ANSI B18.6.3-1972 (R1991)

^a Where specifying nominal size in decimals, zeros preceding decimal points and in the fourth decimal place are omitted.

^a Unless otherwise specified, hexagon head machine screws are not slotted.

All dimensions are in inches.

Table 6. American National Standard Slotted Pan Head Machine Screws ANSI B18.6.3-1972 (R1991)

^a Where specifying nominal size in decimals, zeros preceding decimal and in the fourth decimal place are omitted.

All dimensions are in inches.

Table 7. Nos. 0000, 000 and 00 Threads ANSI B18.6.3-1972 (R1991) Appendix

^a Where specifying nominal size in decimals, zeros preceding decimal and in the fourth decimal place are omitted.

^b There is no allowance provided on the external threads.

^c The minor diameter limits for internal threads are not specified, they being determined by the amount of thread engagement necessary to satisfy the strength requirements and tapping performance in the intended application.

All dimensions are in inches.

Table 8. American National Standard Slotted Fillister and Slotted Drilled Fillister Head Machine Screws ANSI B18.6.3-1972 (R1991)

All dimensions are in inches.

¹ Where specifying nominal size in decimals, zeros preceding decimal points and in the fourth decimal place are omitted.

² Drilled hole shall be approximately perpendicular to the axis of slot and may be permitted to break through bottom of the slot. Edges of the hole shall be free from burrs.

³ A slight rounding of the edges at periphery of head is permissible provided the diameter of the bearing circle is equal to no less than 90 percent of the specified minimum head diameter.

Table 9. American National Standard Slotted Oval Countersunk Head Machine Screws ANSI B18.6.3-1972 (R1991)

^a When specifying nominal size in decimals, zeros preceding decimal points and in the fourth decimal place are omitted.

^b These lengths or shorter are undercut.

All dimensions are in inches.

Table 10. American National Standard Header Points for Machine Screws before Threading ANSI B18.6.3-1972 (R1991)

All dimensions in inches. Edges of point may be rounded and end of point need not be flat nor perpendicular to shank. Machine screws normally have plain sheared ends but when specified may have header points, as shown above.

Table 11. American National Standard Slotted Binding Head and Slotted Undercut Oval Countersunk Head Machine Screws ANSI B18.6.3-1972 (R1991)

^a Where specifying nominal size in decimals, zeros preceding decimal points and in the fourth decimal place are omitted.

Standard Slot Sizes

^b Unless otherwise specified, slotted binding head machine screws are not undercut.

^a These lengths or shorter are undercut.

All dimensions are in inches.

Table 12. Slotted Round Head Machine Screws ANSI B18.6.3-1972 (R1991) Appendix

^a When specifying nominal size in decimals, zeros preceding decimal point and in the fourth decimal place are omitted.

All dimensions are in inches.

Not recommended, use Pan Head machine screws.

Machine Screw Cross Recesses

Four cross recesses, Types I, IA, II, and III, may be used in lieu of slots in machine screw heads. Dimensions for recess diameter M, width N, and depth T (not shown above) together with recess penetration gaging depths are given in American National Standard ANSI B18.6.3-1972 (R1991) for machine screws, and in ANSI/ASME B18.6.7M-1985 for metric machine screws.

ANSI Cross Recesses for Machine Screws and Metric Machine Screw

Summary

This article presents information about standard machine screws and nuts, including the different types and tables of sizes with key dimensions. Learn more about fasteners from the Machinery's Handbook, 30th Edition, which is published and available from Industrial Press on Amazon.

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With the new year setting in, I decided to do replace my kitchen sink to give my kitchen a new look. So while I was researching on the essentials to consider when replacing a kitchen sink, I found out that sizes play a major role. Imagine spending plenty of dollars on a new sink only to realize it doesn’t fit comfortably or just not well enough. So I thought I would share my findings with you which can assist you in making better decisions when choosing a size for your kitchen sink.

So what is the standard kitchen sink size? While the standard kitchen sink size measures 22-by-30 inches (Length by Width), sink sizes generally depend on the interior width of the sink’s cabinet. On an average, cabinets measure 36 to 42 inches high, 24 inches deep and 25-1/4 to 26 inches wide. Although a 36-inch base cabinet can be filled by a 33-by-22 inch kitchen sink comfortably, the standard 22-by-33 inch sink size can fit well within these dimensions as well.

However, the average size will have its own variations depending on different features varying from the material of the sink to the environment where a kitchen sink is installed. Think of an instance where the kitchen size is too small to install a standard size sink. This is why it is important to get a thorough understanding of this topic, before making a selection.

Standard Kitchen Sink Sizes

As I mentioned above, the average size of a sink is 22-by-30 (Length by Width) inches which can fit well with the standard interior width of sink cabinets (36 to 42 inches high, 24 inches deep and 25-1/4 to 26 inches wide).

If you are opting for a smaller sink size as a result of smaller kitchen space, the most common small kitchen size measures 24-inches wide and often comes as a square D-bowl. A 27-inch sink base cabinet would be most likely to comfortably fit the dimensions of a small sink (24-inches width).

The most commonly installed kitchen sink size measures 30 inches wide, which gives a variety of choices when it comes to shapes, such as single bowl orca/square and double bowl. This normal size (30 inches wide) can comfortably fit in at least a 33-inch base cabinet.

If you have a larger kitchen area that can smoothly accommodate a larger sink, the average size of a large sink measures 33 inches or 36 inches in width, which is often available in the single or double bowl shape.

These sizes and dimensions are highly recommended if you’re planning to completely replace the sink, including the cabinet and/or countertop, as this will give more freedom to choose the most suitable size of your choice. In contrast, if you are planning to replace just the sink, it is important that you take accurate measurements of the cabinet and/or countertop that is connected to the sink before making a decision on the sink size.

Although a quality sink can last for a longer period, frequent use can cause scratches and eventually wear over time. Hence, in addition to size, it is important to consider what the sink is made out of. Varying among options such Stainless Steel Sinks, Acrylic Kitchen Sinks, Porcelain- Copper Kitchen Sinks, Enameled Cast Iron Sinks, Fireclay Sinks, Stone – Granite/Composite/Marble Sinks and Solid Surface Sinks, each option has its own specialty.

However, due to the cost-effectiveness, durability, and longevity, stainless steel skinks are the option most homeowners opt for. Hence below are the size options available for a stainless steel kitchen sink.

Sizes of stainless steel sinks

Stainless steel skins are measured by gauge, the lower the gauge number the better the thickness, durability, longevity and is equally expensive. For example, an 18 number gauge stainless steel sink provides longer wear and tear over a 22 number gauge stainless steel sink.

Standard Keyhole Slot Dimensions

The standard size of Stainless steel kitchen sink is measured at 19 gauge which is cost-effective for a kitchen sink. However, the better quality comes with an 18 gauge, which is 0.0500 inches. Many findings have recommended 16 to 18 gauges as a choice for kitchen sink improvement. As I mentioned earlier the lower the number of the gauge the better the quality, hence a 16 gauge stainless steel sink with a thickness of 0.0625 is considered to be a luxury sink.

Restaurants and other commercial establishments, on the other hand, use commercial gauges which have a range between 14 to 16 gauge, that is large and deep intended for hard and frequent use.

It would have been clear by now that not all sink sizes, types and style suit every environment that a kitchen sink needs to be installed. Depending on the environment and its requirements, the average size of a kitchen sink varies, which can be as follows.

1. On general high volume restaurants or hotels opt for compartment sinks for their kitchens, which makes it easier for dishwashers or chefs to efficiently organize, wash, rinse and sanitize dishes or to complete multiple tasks at once, in separate convenient compartments. While the average size of one compartment sink without drain board measures 25 inches in length, 27 inches in width, 45 inches in height and 14 inches in depth, the lengthiest compartment sink on average has four compartments very often. The four compartment sink without drain board on average measures 97 inches in length, 27 inches in width, 42 inches in height and 12 inches in depth.

2. A house kitchen can have an average of 22-by-30 (Length by Width) inches with an 8-10 inches depth (While a deeper sink makes soaking pans and pots easier, a less depth can make the sink shallower and easier to use).

Similar to shallower sinks, many house owners prefer double bowl sinks over single bowl sink for convenience purposes. From being able to use one side of the sink i.e. one bowl specifically for garbage disposal to using separate bowls for soaking and cleaning pots; a double bowl sink creates more space for multitasking. For example, one bowl of the sink could be used for cleansing and sanitizing purposes, while the other can be used for washing hands and filling pots, which is ideal for a busy home. So below is a size guide for double bowl sinks that can assist you in purchasing one.

Double Bowl Kitchen Sink Sizes

A double bowl sink is one sink separated by two bowls, making it “Double Bowl”. Although this sink comes readily available in many sizes due to its convenience for house owners, the standard size of a double bowl sink is 33 inches in length, 22 inches in width and 8 inches in depth. Size of 36 inches in length are also common, with the availability of 10-inch depth sinks if needed.

Standard Keyway Slot Dimensions

Double bowl kitchen sinks can get wider as 48 inches. However, the bowls can be equal in size or smaller or larger than the other, depending on your preference and need.

Related Questions

Standard Key Slot Dimensions

What is the standard kitchen sink height?

Sink heights often depend on the height of the people in the home and based on personal preferences. However, the average height of a kitchen sink with inset countertops and/or cabinets stands at around 36 inches high.

On the other hand, an average height of 34 inches from the rim of the sink to the finish floor is expected to be the standard height for sinks that follow ADA (Americans with Disability Act) requirements.

How deep should a kitchen sink be?

Standard Slot Dimensions

On average the depth of the kitchen sink today ranges between 8-10 inches, while it can go up to 12 inches deeper. However, this again depends on the height of the people in the house or the ones that often use the sink.

As mentioned above shallower sinks are convenient to use and usually is less than 8 inches in depth. This will make it easier for people with an average height or shorter to work in the sink without having to lean when reaching to the bottom of the sink. Similarly taller people can work with the sink without having to crouch.

Standard Parking Slot Dimensions

On the other hand, deeper sinks often are more than 10 inches in depth. Deeper sinks are ideal if you are a frequent user of large or many dishes. This will help soak many dishes in the sink and also helps washing larger vessels without water splashing over the countertops and/or the cabinet adjoined below.