Part Number
Round Plain Nut · MS (Military Standard) · NSN 5310-00-680-5671
| Part number | MS172238 |
|---|---|
| Specification family | MS (Military Standard) |
| Item name | Round Plain Nut |
| Unit of issue | EA |
| Cross-referenced NSN | 5310-00-680-5671 |
| Federal Supply Class (FSC) | 5310 — Nuts and Washers |
| Unit price (USD) | $12.27 |
| 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 round plain nut. Confirm controlling dimensions against your drawing or standard sheet before ordering.
| Hardness Rating | 26.0 Rockwell C Minimum And 32.0 Rockwell C Maximum |
|---|---|
| Material | Steel Comp 4140 Overall |
| Thread Quantity Per Inch | 32 |
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. MS172238 breaks down as MS172238 — the Military Standard sheet that fixes the part's design — with no dash number, denoting the base configuration.
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 $12.27, this item sits above the class median of $8.76.
Who orders MS172238. Aircraft owners and MRO shops replacing standard hardware, machine shops and OEMs filling a bill of materials, and government contractors sourcing against NSN 5310-00-680-5671. 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.
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.
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.
NSN 5310-00-680-5997
NSN 5310-00-680-9290
NSN 5310-00-685-2766
NSN 5310-00-685-3427
NSN 5310-00-688-1998
NSN 5310-00-689-8195
NSN 5310-00-689-8228
NSN 5310-00-701-5786
NSN 5310-00-720-8314
NSN 5310-00-720-8819
NSN 5310-00-723-3870
NSN 5310-00-723-6995
