Description
BECKSON Complete Knob Assembly 1/4-20M Black – PRT-AB
The Beckson PRTAB is a black twist-bolt knob assembly sold as a pair, including stainless steel toggle bolts and mounting pins—designed for Beckson portlights and other applications using ¼-20 threaded studs. This assembly provides tool-free, secure fastening with crimp-thread safety features to prevent accidental knob loss. Ideal for marine use, it can also replace knobs on Bimini tops, roof racks, barbecues, or any application using standard ¼-20 hardware.
Key Features:
- Black twist-bolt knob assemblies including stainless steel ¼-20 toggle bolts and portlight frame pins
- Sold in pairs (knobs + hardware included) for complete installation
- Crimped terminal threads provide tamper-resistant retention
- Tool-free fastening via twist knob operation
- Compatible with Beckson portlights and generic ¼-20 threaded systems
Specifications:
- Model: PRTAB
- Type: Twist-bolt knob with hardware
- Thread Size: ¼-20 stainless steel
- Color: Black
- Sold As: Pair (includes knobs and hardware)
- Material: Marine-grade plastic and stainless steel
- Intended Use: Portlights, Bimini tops, racks, barbecues, general marine fastening
- Safety Feature: Crimped threads prevent accidental removal; removal may require uncrimping or careful force









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