Description
MS28773-04 – RETAINER
NEW SURPLUS, SOLD PER EACHNo specs available for this listing at this time. If you can share a spec sheet or confirmed details, email Sales@avboxus.com. We’re actively expanding our part information.
Part Number: MS28773-04
Unpunctuated: MS2877304
The specifications above are for reference only. Verify tolerances and details in the official spec sheets before use.
AVBOX US Certificate of Conformance: This product comes with an AVBOX US Certificate of Conformance (CoC), assuring that the part(s) meet specified design, quality, and regulatory standards at the time of manufacture, providing confirmation of compliance and adherence to applicable aviation requirements.
Part Numbers, Alternates & Reference Info: We ship the exact part number shown in the product title/description when in stock. Any NSNs or alternate part numbers listed are for traceability/reference only. If a compatible alternate is the only option available, we will contact you before shipping to confirm acceptance. Specifications are compiled from multiple sources and provided for convenience; always verify fit, tolerances, and requirements in the official spec sheets and applicable repair manuals/IPCs before purchase. If specific documentation (e.g., 8130 or company CoC/trace) is required, please contact us before ordering. We do not provide usage/support guidance, please refer to the manuals. Ordering the wrong part can extend lead times and result in aircraft downtime.
Specifications
No specifications have been added for this product yet.
Please review the product title, part number, condition, photos, and description before ordering.
Alternate Parts
No alternate parts have been added for this product yet.
Verification Required: Alternate, equivalent, superseded, and manufacturer-reference parts must be verified for part number accuracy, aircraft configuration, documentation requirements, and suitability before purchase or use.
Additional Information
Before ordering, please review the product title, part number, condition, quantity, unit of measure, photos, documentation notes, and any listed alternate part numbers.
Condition & Documentation
Only the condition and documentation shown or stated on this product listing should be expected with the order. Company CoC, Manufacturer CoC, trace, FAA Form 8130-3, tags, or other paperwork should only be expected when clearly listed.
Part Number Verification
Aircraft parts and hardware can look similar while differing by dash number, suffix, material, finish, dimensions, certification, or application. Customers are responsible for confirming the correct part number and suitability before purchase or use.
Shipping & Ordering
Orders are generally processed within 24 business hours when possible. Orders with customer-provided shipping accounts, tax-exempt requests, missing information, special handling, or documentation questions may require review before shipment.
Certification & Conditions Guide | Shipping & Ordering | Contact AVBOX US
Need Help Verifying This Part?
Send us the part number, quantity needed, documentation requirements, and aircraft or application details when available. We can help review the information shown in the listing before you order.






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