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OneMonroe’s Lyn-tron Captive Panel Screws are proudly manufactured in the USA and engineered for reliable, secure fastening in electronic enclosures, panels, and industrial assemblies. Designed to remain attached to the panel even when disengaged, these captive screws eliminate the risk of lost hardware and improve serviceability in high-vibration or maintenance-intensive environments.

Crafted with precision and available in a variety of thread sizes, head styles, and finishes, Lyn-tron Captive Panel Screws offer a clean, professional look with consistent performance. These screws are ideal for use in aerospace, defense, telecom, and rack-mounted systems where retention and durability are critical.

As part of the trusted Lyn-tron brand, our captive panel screws are CNC-machined to tight tolerances and meet demanding quality standards. Whether you're building custom equipment or retrofitting existing hardware, you can count on OneMonroe’s American-made quality and engineering expertise.

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Item #

OD

Head Diameter

Shank DIA

Point Diameter

Male Thread

Head Length

Thread Length

Point Length

Material

Knurl TPI

Style

Quantity
ST3490-00 N/A 1/2 N/A 1/2 N/A .175 N/A .175 N/A 1/4-28 N/A 9/16 N/A 5/16 N/A 3/16 N/A Steel N/A 30 N/A Thin Head
ST3491-00 N/A 1/2 N/A 1/2 N/A .175 N/A .175 N/A 1/4-28 N/A 9/16 N/A 5/16 N/A 3/16 N/A Steel N/A 30 N/A Thin Head
ST3492-00 N/A 1/2 N/A 1/2 N/A .175 N/A .175 N/A 1/4-28 N/A 9/16 N/A 5/16 N/A 3/16 N/A Steel N/A 30 N/A Thin Head
ST3493-00 N/A 1/2 N/A 1/2 N/A .175 N/A .175 N/A 1/4-28 N/A 9/16 N/A 5/16 N/A 3/16 N/A Steel N/A 30 N/A Thin Head
ST3494-00 N/A 1/2 N/A 1/2 N/A .175 N/A .175 N/A 1/4-28 N/A 9/16 N/A 5/16 N/A 3/16 N/A Steel N/A 30 N/A Thin Head
ST3495-00 N/A 1/2 N/A 1/2 N/A .175 N/A .175 N/A 1/4-28 N/A 9/16 N/A 5/16 N/A 3/16 N/A Steel N/A 30 N/A Thin Head
ST3496-00 N/A 1/2 N/A 1/2 N/A .175 N/A .175 N/A 1/4-28 N/A 9/16 N/A 5/16 N/A 3/16 N/A Steel N/A 30 N/A Thin Head
ST3497-00 N/A 1/2 N/A 1/2 N/A .175 N/A .175 N/A 1/4-28 N/A 9/16 N/A 5/16 N/A 3/16 N/A Steel N/A 30 N/A Thin Head
ST3498-00 N/A 1/2 N/A 1/2 N/A .175 N/A .175 N/A 1/4-28 N/A 9/16 N/A 5/16 N/A 3/16 N/A Steel N/A 30 N/A Thin Head
ST3499-00 N/A 1/2 N/A 1/2 N/A .175 N/A .175 N/A 1/4-28 N/A 9/16 N/A 5/16 N/A 3/16 N/A Steel N/A 30 N/A Thin Head
ST3500-00 N/A 1/2 N/A 1/2 N/A .175 N/A .175 N/A 1/4-28 N/A 9/16 N/A 5/16 N/A 3/16 N/A Steel N/A 30 N/A Thin Head
ST3501-00 N/A 1/2 N/A 1/2 N/A .175 N/A .175 N/A 1/4-28 N/A 9/16 N/A 5/16 N/A 3/16 N/A Steel N/A 30 N/A Thin Head
ST3502-00 N/A 1/2 N/A 1/2 N/A .175 N/A .175 N/A 1/4-28 N/A 9/16 N/A 5/16 N/A 3/16 N/A Steel N/A 30 N/A Thin Head
ST3503-00 N/A 1/2 N/A 1/2 N/A .175 N/A .175 N/A 1/4-28 N/A 9/16 N/A 5/16 N/A 3/16 N/A Steel N/A 30 N/A Thin Head
ST3504-00 N/A 1/2 N/A 1/2 N/A .175 N/A .175 N/A 1/4-28 N/A 9/16 N/A 5/16 N/A 3/16 N/A Steel N/A 30 N/A Thin Head
ST3505-00 N/A 1/2 N/A 1/2 N/A .175 N/A .175 N/A 1/4-28 N/A 9/16 N/A 5/16 N/A 3/16 N/A Steel N/A 30 N/A Thin Head
ST3506-00 N/A 1/2 N/A 1/2 N/A .175 N/A .175 N/A 1/4-28 N/A 9/16 N/A 5/16 N/A 3/16 N/A Steel N/A 30 N/A Thin Head
ST3507-00 N/A 1/2 N/A 1/2 N/A .175 N/A .175 N/A 1/4-28 N/A 9/16 N/A 5/16 N/A 3/16 N/A Steel N/A 30 N/A Thin Head
ST3508-00 N/A 1/2 N/A 1/2 N/A .175 N/A .175 N/A 1/4-28 N/A 9/16 N/A 5/16 N/A 3/16 N/A Steel N/A 30 N/A Thin Head
ST3509-00 N/A 1/2 N/A 1/2 N/A .175 N/A .175 N/A 1/4-28 N/A 9/16 N/A 5/16 N/A 3/16 N/A Steel N/A 30 N/A Thin Head
ST3510-00 N/A 1/2 N/A 1/2 N/A .175 N/A .175 N/A 1/4-28 N/A 9/16 N/A 5/16 N/A 3/16 N/A Steel N/A 30 N/A Thin Head
ST3511-00 N/A 1/2 N/A 1/2 N/A .175 N/A .175 N/A 1/4-28 N/A 9/16 N/A 5/16 N/A 3/16 N/A Steel N/A 30 N/A Thin Head
ST3512-00 N/A 1/2 N/A 1/2 N/A .175 N/A .175 N/A 1/4-28 N/A 9/16 N/A 5/16 N/A 3/16 N/A Steel N/A 30 N/A Thin Head
ST3513-00 N/A 5/8 N/A 5/8 N/A .230 N/A .230 N/A 5/16-18 N/A 11/16 N/A 3/8 N/A 1/4 N/A Steel N/A 30 N/A Thin Head
ST3514-00 N/A 5/8 N/A 5/8 N/A .230 N/A .230 N/A 5/16-18 N/A 11/16 N/A 3/8 N/A 1/4 N/A Steel N/A 30 N/A Thin Head
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