NAS1149 Washers - Mil-Spec Aerospace Flat Washers

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.

We stock all major NAS1149 series including popular part numbers such as NAS1149F0432P, NAS1149C0316R, NAS1149FN832P, NAS1149C0563R, NAS1149CN416R, NAS1149CN432R, NAS1149CN816R, NAS1149C0863R, NAS1149F0316P, and NAS1149C0832R, and many more. All NAS1149 washers are produced in the U.S.A. under our ISO 9001:2015 certified QMS with DFARS documentation available upon request.

NAS1149B, NAS1149C, NAS1149D, and NAS1149F series in stock
Carbon steel, stainless steel, aluminum, brass, and copper variants available
DFARS documentation available
ISO 9001:2015 certified | Made in the U.S.A.

Showing 51–100 of 290 products

SKU	ID	OD	Thickness	Material	Drawing	Quantity
NAS1149C0963R	ID 0.578	OD 1.062	Thickness 0.063	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149C1032R	ID 0.64	OD 1.188	Thickness 0.032	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149C1232R	ID 0.765	OD 1.312	Thickness 0.032	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149C1290B	ID 0.765	OD 1.312	Thickness 0.09	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149C1290R	ID 0.765	OD 1.312	Thickness 0.09	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149C1416R	ID 0.89	OD 1.5	Thickness 0.016	Material 301 SS 1/4 HD AMS5517	Drawing REV 8	Quantity
NAS1149C1432R	ID 0.89	OD 1.5	Thickness 0.032	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149C1490B	ID 0.89	OD 1.5	Thickness 0.09	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149C1490R	ID 0.89	OD 1.5	Thickness 0.09	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149C1632B	ID 1.015	OD 1.75	Thickness 0.032	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149C1632R	ID 1.015	OD 1.75	Thickness 0.032	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149C1690B	ID 1.015	OD 1.75	Thickness 0.09	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149C1690R	ID 1.015	OD 1.75	Thickness 0.09	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149C1732B	ID 1.078	OD 1.812	Thickness 0.032	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149C1732R	ID 1.078	OD 1.812	Thickness 0.032	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149C1790R	ID 1.078	OD 1.812	Thickness 0.09	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149C1832R	ID 1.14	OD 1.875	Thickness 0.032	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149C1890R	ID 1.14	OD 1.875	Thickness 0.09	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149C2032R	ID 1.265	OD 2.0	Thickness 0.032	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149C2090R	ID 1.265	OD 2.0	Thickness 0.09	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149C2190R	ID 1.328	OD 2.062	Thickness 0.09	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149C2216R	ID 1.39	OD 2.125	Thickness 0.016	Material 301 SS 1/4 HD AMS5517	Drawing REV 8	Quantity
NAS1149C2432R	ID 1.515	OD 2.25	Thickness 0.032	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149C2490R	ID 1.515	OD 2.25	Thickness 0.09	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149C2690R	ID 1.64	OD 2.375	Thickness 0.09	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149C3690R	ID 2.265	OD 3.0	Thickness 0.09	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149CN016R	ID 0.068	OD 0.188	Thickness 0.016	Material 301 SS 1/4 HD AMS5517	Drawing REV 8	Quantity
NAS1149CN032R	ID 0.068	OD 0.188	Thickness 0.032	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149CN216B	ID 0.099	OD 0.25	Thickness 0.016	Material 301 SS 1/4 HD AMS5517	Drawing REV 8	Quantity
NAS1149CN216R	ID 0.099	OD 0.25	Thickness 0.016	Material 301 SS 1/4 HD AMS5517	Drawing REV 8	Quantity
NAS1149CN232R	ID 0.099	OD 0.25	Thickness 0.032	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149CN316B	ID 0.105	OD 0.25	Thickness 0.016	Material 301 SS 1/4 HD AMS5517	Drawing REV 8	Quantity
NAS1149CN316R	ID 0.105	OD 0.25	Thickness 0.016	Material 301 SS 1/4 HD AMS5517	Drawing REV 8	Quantity
NAS1149CN332B	ID 0.105	OD 0.25	Thickness 0.032	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149CN332R	ID 0.105	OD 0.25	Thickness 0.032	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149CN416B	ID 0.125	OD 0.312	Thickness 0.016	Material 301 SS 1/4 HD AMS5517	Drawing REV 8	Quantity
NAS1149CN416R	ID 0.125	OD 0.312	Thickness 0.016	Material 301 SS 1/4 HD AMS5517	Drawing REV 8	Quantity
NAS1149CN432B	ID 0.125	OD 0.312	Thickness 0.032	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149CN432R	ID 0.125	OD 0.312	Thickness 0.032	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149CN516R	ID 0.14	OD 0.438	Thickness 0.016	Material 301 SS 1/4 HD AMS5517	Drawing REV 8	Quantity
NAS1149CN532B	ID 0.14	OD 0.438	Thickness 0.032	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149CN532R	ID 0.14	OD 0.438	Thickness 0.032	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149CN542R	ID 0.14	OD 0.438	Thickness 0.042	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149CN616B	ID 0.149	OD 0.375	Thickness 0.016	Material 301 SS 1/4 HD AMS5517	Drawing REV 8	Quantity
NAS1149CN616R	ID 0.149	OD 0.375	Thickness 0.016	Material 301 SS 1/4 HD AMS5517	Drawing REV 8	Quantity
NAS1149CN632B	ID 0.149	OD 0.375	Thickness 0.032	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149CN632R	ID 0.149	OD 0.375	Thickness 0.032	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity
NAS1149CN816B	ID 0.174	OD 0.375	Thickness 0.016	Material 301 SS 1/4 HD AMS5517	Drawing REV 8	Quantity
NAS1149CN816R	ID 0.174	OD 0.375	Thickness 0.016	Material 301 SS 1/4 HD AMS5517	Drawing REV 8	Quantity
NAS1149CN832B	ID 0.174	OD 0.375	Thickness 0.032	Material 301/302/304 A AMS5901,5516,5513	Drawing REV 8	Quantity

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.

NAS1149 Washers - Mil-Spec Aerospace Flat Washers