Part Number
O-Ring · NAS (National Aerospace Standard) · NSN 5331-01-192-6623
| Part number | NAS1611-166A |
|---|---|
| Specification family | NAS (National Aerospace Standard) |
| Item name | O-Ring |
| Alternate references | NAS1611; 2-166E515-80; NAS1611-166; SR721-80-166; PRP166-3238 |
| Unit of issue | EA |
| Cross-referenced NSN | 5331-01-192-6623 |
| Federal Supply Class (FSC) | 5331 — O-Rings |
| Unit price (USD) | $5.25 |
| Country of origin | Türkiye (Turkey) |
| Lead time | Within 90 days of order |
| Minimum order | May apply — confirm on quote |
| Documentation | Source documentation provided on all orders |
Characteristics decoded from the federal cataloging record for this o-ring. Confirm controlling dimensions against your drawing or standard sheet before ordering.
| Cross-Sectional Height | 0.100 Inches Minimum And 0.106 Inches Maximum |
|---|---|
| Hardness Rating | 80.0 Shore Durometer A Nominal |
| Material | Rubber Ethylene-Propylene Class Epm |
| Outside Diameter | 6.897 Inches Minimum And 6.989 Inches Maximum |
Precision elastomeric sealing rings of circular cross-section used for static and dynamic sealing in grooves and glands.
Reading the part number. NAS1611-166A breaks down as NAS1611 — the National Aerospace Standard that fixes the part's design — plus the dash/suffix code 166A, which selects the exact size, material, or finish variant from the tables on that standard. Two parts sharing the NAS1611 base are the same design in different variants.
Price in context. Across the 594 items we currently stock in FSC 5331 (O-Rings), published unit prices run from $0.14 to $3,504.60. At $5.25, this item sits below the class median of $5.25.
Stock activity. This item has appeared once in our supplier stock feed, most recently listed 2026-07-13, with a lot quantity of 82 units. Listing activity is a practical signal of ongoing availability; confirm current stock and firm pricing on your quote.
Who orders NAS1611-166A. Aircraft owners and MRO shops replacing standard hardware, machine shops and OEMs filling a bill of materials, and government contractors sourcing against NSN 5331-01-192-6623. You can order by part number or by stock number — it is the same item, the same published price, and the same quote form.
Applicable standards. AS568 dash sizes, MIL-P-5510 / SAE AS5857; nitrile, fluorocarbon (Viton), EPDM, and silicone compounds.
Need this part modified, or a similar part made to your print? See our U.S.-based CNC machining services and aerospace machining capability.
Country of origin: Türkiye (Turkey). Turkey is a NATO ally and a normal-trade-relations partner of the United States, and Turkish-origin end items are eligible for a wide range of U.S. federal and DLA procurements.
TAA note: Turkey is not a Trade Agreements Act (TAA) designated country, so these items are generally not eligible for TAA-covered solicitations. They are offerable under the Buy American Act and many non-TAA DLA buys. Buyers are responsible for confirming the origin requirements of their specific solicitation.
Full country-of-origin and source documentation is provided with every order. Fulfillment within 90 days of order. Minimum order may apply.
Items are supplied as stock mil-spec / commercial hardware with source documentation and country-of-origin paperwork on every order. Parts are not supplied with an FAA Form 8130-3 airworthiness tag unless expressly stated on the quote. Buyers installing hardware on certificated aircraft are responsible for acceptance under their own maintenance program, repair station procedures, or owner/operator authority.
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