Thread | Grip | Length | Part Number |
---|---|---|---|
1/4-28 | 0.312 | 0.781 | NAS334CPA6 |
Material - Alloy Steel (8740) Heat Treat - 160,000 - 180,000 PSI Finish - Cadmium Per QQ-P-416 Type II |
Please note, Aircraft Spruce Australia's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce Australia assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.
The NAS333 machine screws have a 100* countersink. The countersink tools we offer have 1/4-28 threads and commonly used with a microstop cage. You can purchase a drill extension like part # 12-01535, which has female 1/4-28 threads, and be able to use a normal drill chuck with these countersinks. You can view these parts on our web site if you search "countersink cutter" and "drill extension".