The stainless steel small head knurled hand screw is a multi-specification, stainless steel, lathe-machined small head knurled hand screw. It can be used in many ways. Let's take stock.
Workpiece preparation
First, pre-drill through holes or threaded bottom holes that meet the screw specifications on the two workpieces that need to be fastened or connected.
The through hole has no threads and is used for the part of the workpiece through which the screw passes. The hole diameter should be slightly larger than the diameter of the screw rod, which is usually about 0.1-0.5mm larger than the major diameter of the thread. The threaded bottom hole is threaded and is used for the part of the workpiece where the screw is screwed in and generates tightening force. The standard bottom hole diameter that meets the screw thread specifications must be drilled. This is the most critical step. If the bottom hole is drilled incorrectly, it will result in failure to screw in or insufficient thread strength.
Alignment and insertion: Align the two workpieces to be connected, then pass the threaded end of the hand screw through the through hole of the first workpiece and align it with the threaded bottom hole of the second workpiece.
Manual tightening and disassembly: Pinch the knurled head of the screw with your fingers. Apply moderate rotational force clockwise, use the friction provided by the knurl to screw the screw into the threaded bottom hole of the second workpiece; tighten until you feel appropriate resistance and achieve the required tightening degree. Avoid excessive force to prevent slipping or damage to the screw and knurl. When removing, pinch the knurled head with your fingers, apply force counterclockwise, and completely unscrew the screw.
Core advantage: The biggest feature of the use is that it can be installed and removed without any tools (such as screwdrivers, wrenches).
Knurled head: The knurled pattern (straight or mesh), precisely turned on the side of the head, provides excellent finger friction and is the key to achieving tool-free operation.
Low profile: The head has a relatively small diameter and a low height.
Advantages: It takes up little space and is suitable for applications with limited space. The pressure on the workpiece surface will be more concentrated, but it should be noted that its load-bearing capacity is not as good as that of large washers or large-headed screws. The appearance is simpler and more beautiful.
Stainless steel (usually 304 or 316)
Excellent corrosion resistance: It can resist moisture, water vapor, general chemicals, and atmospheric corrosion, and is suitable for a variety of indoor and outdoor environments.
Good strength: It provides sufficient mechanical strength to meet general fastening needs.
Durability: It is not easy to rust or wear, and has a long service life.
Hygiene (especially 316): It is often used in food, medical, or high-demand industrial environments.
Beautiful appearance: It has a metallic luster and a neat appearance.
Precision machining on a lathe: The threads, heads, knurling, and other parts are precision machined on a lathe, with precise dimensions and good tolerance control.
High finish: The surface finish is good, the threads are smooth, and the screw-in resistance is small and stable.
Consistency: It has high consistency and good interchangeability during mass production.
Easy to install: The operation is extremely simple and fast, especially suitable for occasions where frequent assembly and disassembly are required or when tools are inconvenient to use.
Reduces the complexity of operation and tool dependence.
Applicable scenarios
Ideal applications: Electronic equipment housings, instrument panels, light chassis, fixture locating pins, adjustment knobs, display stands, panels that require frequent maintenance, small furniture, DIY projects, laboratory equipment and other low-torque, non-critical load-bearing fastening occasions.
Unsuitable scenarios: Occasions that require extremely high torque locking (such as engine parts), withstand huge vibration or tension, are the main load-bearing structural parts, and require anti-loosening (usually require additional measures such as nylon rings and glue dispensing).
Key considerations
Torque limit: The torque that can be applied by fingers is limited, and it is not suitable for occasions that require very large locking force. Excessive tightening may cause knurling to slip, finger pain, and even damage to the thread.
Anti-loosening: Standard hand-tightening screws do not have active anti-loosening functions (such as spring washers and nylon locking). They are easy to loosen in a vibrating environment. If necessary, glue can be dispensed at the end of the screw or used with anti-loosening washers.
Carrying capacity: The "small head" design means a small contact area and a large pressure applied to the workpiece surface. When it is necessary to disperse pressure to protect soft materials, additional flat washers may be required.
Pre-drilling requirements: The matching thread bottom hole must be drilled strictly according to the specifications, otherwise it cannot be screwed in correctly or the thread is easily damaged.
Knurling wear: Although stainless steel is wear-resistant, the knurled edge may still become blunt due to friction after long-term, frequent use or excessive tightening, reducing finger friction.
Stainless steel small-head knurled thumb screws are suitable for low torque, convenient operation, non-extreme environments or critical load-bearing applications. Be sure to pre-drill the bottom hole correctly when using it, and clearly understand its torque limit and possible anti-loosening needs.
