Part Number

SM-B-527553-11

Saddle Washer · OEM / vendor part number · NSN 5310-00-680-5997

Unit price $5.25 USD
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At a Glance

SM-B-527553-11 details

Part numberSM-B-527553-11
Specification familyOEM / vendor part number
Item nameSaddle Washer
Alternate referencesD4-167; SC5325-0037-4; 9132M95P01
Unit of issueEA
Cross-referenced NSN5310-00-680-5997
Federal Supply Class (FSC)5310 — Nuts and Washers
Unit price (USD)$5.25
Country of originTürkiye (Turkey)
Lead timeWithin 90 days of order
Minimum orderMay apply — confirm on quote
DocumentationSource documentation provided on all orders
About This Part

Nuts and Washers

Internally threaded fasteners (hex nuts, lock nuts, castle nuts, wing nuts, self-locking nuts) and washers (flat, lock, spring, and special washers) used to distribute load and secure threaded assemblies.

Reading the part number. SM-B-527553-11 is a vendor part number for this saddle washer. If your documentation lists a different reference for the same item, include it on the quote and we will confirm the cross-reference.

Price in context. Across the 1,177 items we currently stock in FSC 5310 (Nuts and Washers), published unit prices run from $0.12 to $68,673.00. At $5.25, this item sits below the class median of $8.76.

Who orders SM-B-527553-11. Aircraft owners and MRO shops replacing standard hardware, machine shops and OEMs filling a bill of materials, and government contractors sourcing against NSN 5310-00-680-5997. 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. ASME B18.2.2 / B18.16, B18.21 / B18.22, NASM/MS series; steel, stainless, and self-locking (nylon-insert and all-metal) designs.

Need this part modified, or a similar part made to your print? See our U.S.-based CNC machining services and aerospace machining capability.

Sourcing & Compliance

Origin, documentation & ordering terms

Country of Origin & Trade Eligibility

Country of origin: Türkiye (Turkey) — a DFARS qualifying country. Türkiye is a NATO ally with a reciprocal defense procurement agreement with the U.S. Department of Defense, making it a qualifying country under DFARS 225.003. On DoD and DLA solicitations, qualifying-country end products are evaluated without Buy American price penalties — they compete on par with domestic product — and DoD trade-agreements clauses (DFARS 252.225-7021) expressly accept qualifying-country end products.

Dollar thresholds. The Trade Agreements Act only applies to supply contracts at or above $174,000 (the WTO GPA threshold effective March 2026); below that — where the vast majority of hardware buys fall — the TAA does not apply at all. The main exclusion is civilian-agency solicitations at or above that threshold that restrict award to TAA designated-country products (Türkiye is not TAA-designated). 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.

Documentation & Acceptance

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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