Buy NSN Parts
Lock Washer — Nuts and Washers (FSC 5310) · Part No. ASAB27-1-1950HEAVYSERIES
| National Stock Number | 5310-00-209-0971 |
|---|---|
| Item name | Lock Washer |
| Part number (commercial reference) | ASAB27-1-1950HEAVYSERIES |
| Alternate references | ASAB27-1950HEAVYSERIES |
| Unit of issue | EA |
| NIIN | 002090971 |
| NIIN assigned by | United States (NCB code 00) |
| Federal Supply Class (FSC) | 5310 — Nuts and Washers |
| Federal Supply Group (FSG) | 53 — Hardware and Abrasives |
| Unit price (USD) | $1.94 |
| 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 lock washer. Confirm controlling dimensions against your drawing or standard sheet before ordering.
| Material | Steel Comp 302 Overall Or Steel Comp 303 Overall Or Steel Comp 304 Overall |
|---|---|
| Outside Diameter | 0.310 Inches Nominal |
| Surface Treatment | Passivate Overall |
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.
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 $1.94, this item sits well below the class median of $8.76 — commodity hardware usually bought in volume.
Typical applications. Paired with screws, bolts, and studs across every mechanical assembly; washers used for load distribution, spacing, and vibration resistance.
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.
NSN 5310-00-209-0971 is supplied by Quick Brown Fox Solutions as a stock resale item. For custom-manufactured or prototype parts to your print, see our U.S.-based CNC machining services.
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.
LM200-16
NAS1169-02
MS21045L16
MS17829-14C
107-S-39
58A164B542
22K1-048
MS172290
H29220-5
4G13798-101A
MS17828-16C
FNA401-080
