Finding The Right Hex Key For Your Pt Evo Screw

Hex keys, also known as Allen keys, are used to tighten or loosen hex screws. They come in various sizes, and it is important to use the correct size for the specific screw. The size of a hex key is determined by the diameter of the hex screw it is intended to fit. When selecting a hex key, it is important to choose one that is neither too large nor too small for the screw. While some screws have standard sizes, others may be metric, requiring a different type of hex key. It is also worth noting that the quality of the hex key can impact its effectiveness, with cheap keys sometimes being incorrectly sized or lacking the necessary hardness.

Hex key sizes for AR-15 grip screws

One user on AR15.com reported that they had a Battle Grip installed but thought the internal screw was original. They were unsure of the type of screw, suggesting it could be slotted or Phillips head. The user was advised that the screw is 1" in length and that they should ensure it does not extend into the action area of the lower. They were also informed that most 1/4-28 socket cap screws use a 3/16 hex key. Another user confirmed that a 3/16 hex key was the correct size for their AR-15 grip screw.

Other users have suggested a 5/32 hex key is the correct size. One user on AR15.com reported that, with the help of an ACE Hardware employee, they discovered through trial and error that a 5/32 hex key was the correct size. Similarly, a user on Reddit suggested that a 5/32 hex key was the size they needed for their grip hex screw.

It is worth noting that hex keys are typically designated with a socket size and are sold in kits with a variety of sizes. Therefore, it is recommended to purchase a set of hex keys to ensure you have the correct size for your AR-15 grip screw.

Hex key sizes for 1911 hex head grip screws

Hex keys, also known as hex wrenches, Allen keys, Allen wrenches, or Inbus, are simple drivers for bolts or screws with heads that have internal hexagonal recesses (sockets). They are formed from a single piece of hard hexagonal steel rod, with blunt ends that fit into similarly shaped screw sockets. The rods are bent to 90 degrees, forming two arms of unequal length in an "L" shape. The most common metric hex key sizes are 1.5 mm, 2 mm, 2.5 mm, 3 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 7 mm, 8 mm, 9 mm, and 10 mm. The common SAE hex key sizes are 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 3/16", 7/32", 1/4", 5/16", and 3/8".

Now, to address the specific question of hex key sizes for 1911 hex head grip screws, it is important to understand that the size of the hex key will depend on the specific screw and its dimensions. Without knowing the exact screw you are referring to, it is challenging to provide an exact size. However, based on the information available, here are some insights that can help guide your decision:

First, it is essential to identify the type of screw you are working with. In the context of firearms, grip screws often refer to the screws that secure the grip panels of a handgun, such as a 1911 pistol. These screws typically have smaller dimensions compared to other firearm screws.

According to some sources, a common size for hex head grip screws on firearms is 3/16". This size seems to be prevalent among AR-15 grip screws, as mentioned in the provided links. However, it is always recommended to verify the size before proceeding.

Additionally, it is worth noting that some grip screws may use a different type of drive, such as a flat head or a Torx drive, instead of a hex head. It is crucial to ensure that you are using the correct type of screwdriver or bit for the specific screw.

In conclusion, while 3/16" seems to be a common size for hex head grip screws, it is always best to measure the screw itself or refer to the manufacturer's specifications to determine the exact size of the hex key required for your specific 1911 hex head grip screws.

Flat-head vs hex-head screw

Hex head screws, like hex cap screws, require a wrench or socket. They are commonly used for bolts. Hex heads allow for greater torque to be applied and are driven with the force working against the outside of the head. This is in contrast to other varieties, which are internally driven.

Flat-head screws, on the other hand, are countersunk, meaning they require a countersunk hole unless the material is very soft. Flat-head screws are often used in finish work, and a flat-head screw cover, or "beauty cap," can be used to hide the head. Flat-head screws are also internally driven, meaning the force works from within the head.

To remove or install a hex head screw, a hex key is required. For flat-head screws, a slotted screwdriver (flat blade) is used.

When selecting a screw type, it is important to consider the functional and decorative purposes of the screw. Hex head screws are ideal when greater torque needs to be applied, while flat-head screws are often used for finish work where a smooth, flat surface is desired.

In terms of security, uncommon drive styles such as square socket and Torx offer a degree of protection as the required tools are not as common. For improved security, pin hex or pin Torx screws can be used, which require special drivers that have a small pin added to the center of the drive hole.

Standard vs metric hex key sets

Hex keys, also known as Allen keys or wrenches, are L-shaped or T-shaped tools used to drive bolts and screws with hexagonal sockets. They are available in various sizes and two different measurement systems: metric and imperial (also known as SAE or Standard American Engineering). The metric system uses measurements in millimetres, while the imperial system uses fractional inches.

Standard (SAE) Hex Key Sets

Standard hex key sets are typically measured in inches and are commonly used in American-made products and fasteners. SAE hex keys are ideal for projects involving American-made automobiles, bicycles, and flat-pack furniture. They are also more familiar to those accustomed to using inches and fractions in their measurements. However, SAE hex keys have larger increments between sizes, which may result in an improper fit and potential slippage when used with metric fasteners.

Metric Hex Key Sets

Metric hex key sets are measured in millimetres and are the global standard for measurements. They offer greater precision due to smaller size increments, making them suitable for a more precise fit with fasteners. Metric hex keys are widely used in products made in Europe, Asia, and other parts of the world. They are also easier to identify due to the decimal-based system of the metric system. However, they may have limited compatibility with SAE equipment, and their availability may vary depending on the region.

When deciding between standard and metric hex key sets, consider the specific requirements of your project and the origin of the products and materials you'll be working with. If you primarily work with American-made products or fasteners, standard hex key sets would be more suitable. On the other hand, if you frequently work with metric fasteners or products from Europe or Asia, metric hex key sets would be the better choice. Additionally, evaluate your existing tool collection and consider investing in both types of hex key sets to ensure compatibility and avoid damage caused by using the wrong size.

Recommended hex key brands

When it comes to hex key brands, there are several options available that offer durability and ease of use. Here are some recommended brands to consider:

Bondhus

Bondhus is a popular choice for hex keys and is known for its durability and warranty. They offer a lifetime guarantee for their products, and the keys are made of Protanium Steel, which is said to be stronger than Chrome Vanadium. Bondhus provides a range of sets, including the Ball End L-Wrench Double Pack and the GorillaGrip folding set. The keys are colour-coded, making it easy to distinguish between metric and SAE sizes. They are also available in T-handle styles, which some users prefer for certain applications.

Amazon Basics

Amazon Basics offers an affordable and effective option for hex keys. Their Hex Key Allen Wrench Set with Ball End is a top pick for many, providing a long reach and a ball end for tight spots. The cases for this set are highly praised for their design, making it easy to access and store the keys. While the keys may not be as durable as some other brands, they are suitable for intermittent use and light-duty tasks around the house.

Wiha

Wiha hex keys are German-made and known for their quality. They feature comfortable soft-grip handles and both long-reach ball ends and handle-through keys. The sizes are clearly marked, and the handles are colour-coded. Wiha offers a range of sets, including metric and SAE lineups, as well as Torx sets. While they are on the expensive side, Wiha keys are a good choice for those seeking precision and comfort.

Milwaukee

Milwaukee's 17-Key Folding Hex Key Sets are a good option for those seeking a folding set. The keys are larger and heavier than some other sets, making them easier to unfold, especially for those with larger fingers or dexterity issues. The sizes are clearly marked, and the tools have a solid feel. While they are more expensive than some other options, Milwaukee's hex keys are a good choice for those who prioritise ease of use.

Ampro

Ampro hex keys are designed with industrial customers in mind and offer features such as ergonomic handles and flat cases for secure storage. The keys are available in SAE and metric sizes, as well as a Torx set. While Ampro tools may be more expensive, they are known for their quality and attention to detail.

When choosing a hex key brand, consider factors such as durability, ease of use, size range, grip comfort, colour coding, storage cases, and warranty. It is also helpful to read reviews and consider the value for money based on price and quality.

Frequently asked questions