Part Number
Airframe Ball Bearing · MS (Military Standard) · NSN 3110-00-023-7979
| Part number | MS27640-6 |
|---|---|
| Specification family | MS (Military Standard) |
| Item name | Airframe Ball Bearing |
| Alternate references | AS27640; AN20KP6; MS20200KP6; AN200KP6; K659459-11; K659459-15 |
| Unit of issue | EA |
| Cross-referenced NSN | 3110-00-023-7979 |
| Federal Supply Class (FSC) | 3110 — Bearings, Antifriction, Unmounted |
| Unit price (USD) | $40.30 |
| 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 airframe ball bearing. Confirm controlling dimensions against your drawing or standard sheet before ordering.
| Material | Plastic Polytetrafluoroethylene Seal |
|---|---|
| Material | Steel Comp E52100 Outer Ring |
| Material | Steel Corrosion Resisting Retainer |
| Material | Steel Comp E51100 Ball Or Steel Comp E52100 Ball |
| Material | Steel Comp E52100 Inner Ring |
| Surface Treatment | Cadmium Exposed Surfaces As Mounted |
Rolling-element bearings including ball, roller, needle, and tapered roller bearings that support rotating shafts with minimal friction.
An antifriction ball bearing designed for airframe applications.
Reading the part number. MS27640-6 breaks down as MS27640 — the Military Standard sheet that fixes the part's design — plus the dash/suffix code 6, which selects the exact size, material, or finish variant from the tables on that standard. Two parts sharing the MS27640 base are the same design in different variants.
Price in context. Across the 54 items we currently stock in FSC 3110 (Bearings, Antifriction, Unmounted), published unit prices run from $10.52 to $3,504.60. At $40.30, this item sits well below the class median of $105.14 — commodity hardware usually bought in volume.
Who orders MS27640-6. Aircraft owners and MRO shops replacing standard hardware, machine shops and OEMs filling a bill of materials, and government contractors sourcing against NSN 3110-00-023-7979. 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. ABEC/ISO 492 tolerance classes, AFBMA/ANSI standards.
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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