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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.

captive-panel-screw-type-1_large
Unit of Measure
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Item #

OD

Head Diameter

Shank DIA

Male Thread

Head Length

Thread Length

Knurl TPI

Material

Style

Quantity
ST3291-00 N/A 3/4 N/A 3/4 N/A .175 N/A 1/4-28 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3292-00 N/A 3/4 N/A 3/4 N/A .175 N/A 1/4-28 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3293-00 N/A 3/4 N/A 3/4 N/A .175 N/A 1/4-28 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3294-00 N/A 3/4 N/A 3/4 N/A .175 N/A 1/4-28 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3295-00 N/A 3/4 N/A 3/4 N/A .175 N/A 1/4-28 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3296-00 N/A 3/4 N/A 3/4 N/A .175 N/A 1/4-28 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3297-00 N/A 3/4 N/A 3/4 N/A .175 N/A 1/4-28 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3298-00 N/A 3/4 N/A 3/4 N/A .175 N/A 1/4-28 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3299-00 N/A 9/16 N/A 9/16 N/A .235 N/A 5/16-18 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3300-00 N/A 9/16 N/A 9/16 N/A .235 N/A 5/16-18 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3301-00 N/A 9/16 N/A 9/16 N/A .235 N/A 5/16-18 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3302-00 N/A 9/16 N/A 9/16 N/A .235 N/A 5/16-18 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3303-00 N/A 9/16 N/A 9/16 N/A .235 N/A 5/16-18 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3304-00 N/A 9/16 N/A 9/16 N/A .235 N/A 5/16-18 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3305-00 N/A 9/16 N/A 9/16 N/A .235 N/A 5/16-18 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3306-00 N/A 9/16 N/A 9/16 N/A .235 N/A 5/16-18 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3307-00 N/A 9/16 N/A 9/16 N/A .235 N/A 5/16-18 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3308-00 N/A 9/16 N/A 9/16 N/A .235 N/A 5/16-18 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3309-00 N/A 9/16 N/A 9/16 N/A .235 N/A 5/16-18 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3310-00 N/A 9/16 N/A 9/16 N/A .235 N/A 5/16-18 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3311-00 N/A 9/16 N/A 9/16 N/A .235 N/A 5/16-18 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3312-00 N/A 9/16 N/A 9/16 N/A .235 N/A 5/16-18 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3313-00 N/A 9/16 N/A 9/16 N/A .235 N/A 5/16-18 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3314-00 N/A 9/16 N/A 9/16 N/A .235 N/A 5/16-18 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
ST3315-00 N/A 9/16 N/A 9/16 N/A .235 N/A 5/16-18 N/A 1/4 N/A 3/8 N/A 30 N/A Steel N/A Large Head
Unit of Measure
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