Standards We Stock

Military Standard (MS)

MS designation indicates compliance with U.S. military specifications. Common MS fasteners include:

• MS24694, MS27039 – Truss and Pan Head Screws

• MS21042, MS21045 – Self-Locking Nuts

• MS21250 – Hex Head Bolts

• MS9557, MS9558 – High-Strength Bolts

• MS35266 – Pan Head Phillips Machine Screws

National Aerospace Standard (NAS)

NAS designation for industry-standardized aerospace parts:

• NAS1303-1309 – High-Strength Bolts

• NAS6203-6212 – Tension Head Bolts

• NAS1149 – Flat Washers

• NAS1801 – Self-Locking Screws

Air Force-Navy (AN)

Older but still common designation for general aviation:

• AN3-AN20 – Hex Head Bolts

• AN310 – Castellated Nuts

• AN960 – Flat Washers

• AN509-AN515 – Flat Head Screws