NAS1801 and NAS1802 Hex Head Screws for Aerospace Applications
When an aerospace drawing calls for NAS 1801 or NAS 1802 hex head screws, it asks for more than a screw that looks right on the bench. It points to a published standard that fixes the dimensions and configuration of every part made to it. That shared reference lets a design engineer, a buyer and a manufacturer describe the same screw in the same words, even when they work on different continents.
NAS 1802 sits alongside NAS 1801 as a related aerospace standard for hex-head screws. Both appear on drawings for aircraft structures and engine assemblies, where the drawing and its specifications determine which fastener goes into the joint. So the drawing, not habit or a catalogue picture, is your starting point every time.
What National Aerospace Standards Mean for Your Assembly
National Aerospace Standards come from the Aerospace Industries Association, which develops and maintains them for high-strength, precision fasteners. When a screw is made to one of these standards, its size, form and acceptance requirements follow a document the whole industry reads the same way.
Here is why that matters to you. A part number based on a published standard removes guesswork from every conversation with your supplier. You are not describing a screw in loose terms. You are naming one exactly.
How Engineering Drawings Guide NAS 1801 and NAS 1802 Selection
Every aerospace assembly carries its own set of drawings and specifications. Those documents settle which standard applies, along with the size, length, material and finish the joint was designed around.
It can feel tempting to treat two similar screws as interchangeable, perhaps because they share a head style. The drawing is the better guide. If it names NAS 1801, order NAS 1801. If it names NAS 1802, order that instead, and carry the full part number through to the purchase order.
Ordering NAS Hex Head Screws with Confidence
A smooth order usually comes down to a few habits your team can build into its routine.
- Copy the complete part number exactly as it appears on the drawing.
- Confirm the specification and revision your drawing references.
- Ask for material certification and traceability records with each delivery.
- Check received parts against the drawing before they move to the assembly floor.
Small steps like these give your inspectors a clean record to work from. They also reassure your engineers that every screw in the joint matches the design intent.
Choosing a Manufacturer for NAS Aerospace Screws
The right manufacturing partner makes the whole process feel easier. Look for one that works to aerospace standards, holds aerospace production certifications, and supports custom sizes when your program needs them.
Ask how they test dimensions and mechanical properties, and whether inspection results travel with each shipment. A supplier who answers those questions openly is usually one you can rely on for repeat orders.
Your next steps are simple. Before the next order goes out, pull up the drawing, check the standard it names and share the full part number with your supplier. Have you confirmed that your current purchase orders match your drawings line for line?
Precision Aerospace Fasteners from UPS Lakshmi
UPS Lakshmi manufactures precision fasteners and machined components for aerospace and other demanding industrial applications, including NAS 1801 and NAS 1802 hex head screws.
For more information, visit www.upsind.com.
