NAS1149 aerospace flat washers are manufactured to National Aerospace Standard specification NAS1149 in carbon steel, stainless steel, aluminum, brass, and copper for use in military and aerospace fastener assemblies requiring mil-spec compliance. Superior Washer stocks NAS1149 washers across the full series and size range with material certifications and DFARS documentation available.
See the NAS1149 spec for drawing revision, material cross-references, size range, and DFARS status by material. NAS1149 is one of the highest-volume aerospace flat washer specifications Superior Washer produces, available in five materials across four series to cover the full range of mil-spec fastener assembly requirements. Superior Washer specializes in bulk and large-quantity NAS1149 washer orders, with the inventory depth and production capacity to support high-volume defense and aerospace contracts. NAS1149 washers are part of Superior Washer's complete range of military flat washers. Related specifications: AN960 and MS15795.
NAS1149 Military Washers Frequently Asked Questions
What are NAS1149 washers?
NAS1149 washers are mil-spec flat washers manufactured to National Aerospace Standard (NAS) specification NAS1149. They are among the most widely used aerospace standard washers, designed to provide even load distribution and protect fastener bearing surfaces in demanding military and aerospace applications.
What materials are NAS1149 washers available in?
NAS1149 washers are available in carbon steel, corrosion-resistant stainless steel, aluminum, brass, and copper. The material is encoded in the final letter of the part number. DFARS-compliant material certifications are available for all configurations upon request.
What is the NAS1149 part number structure?
A NAS1149 part number combines a series letter, a four-digit size code, and a material suffix letter. For example, NAS1149F0432P identifies the F series, a specific diameter and thickness, and phosphate-coated carbon steel. NAS1149C0316R identifies the C series in corrosion-resistant stainless. Contact us to confirm availability for a specific configuration.
What NAS1149 series do you stock?
Superior Washer stocks all four major NAS1149 series: B, C, D, and F, covering plain and countersunk configurations across the full range of materials and sizes. With 280 or more configurations available, contact us for sizes or part numbers not shown in the catalog.
Are your NAS1149 washers made in the USA with DFARS-compliant materials?
Yes. All NAS1149 washers are manufactured at our U.S. facilities in Hauppauge, NY and Rock Hill, SC under our ISO 9001:2015 certified Quality Management System. Material certifications and DFARS documentation are available upon request by material variant.
Can you fulfill bulk and large-quantity NAS1149 washer orders?
Yes. Superior Washer specializes in bulk and large-quantity NAS1149 washer orders for defense contractors, aerospace OEMs, and industrial distributors. With extensive raw material inventory and more than 100 power presses across two U.S. manufacturing facilities, we have the production capacity to fulfill high-volume orders across all NAS1149 series and materials. Contact us with your part number, quantity, and certification requirements for a bulk order quote.
