National Stock Number
Setscrew — Screws (FSC 5305) · Part No. MIL-DTL-18240F
| National Stock Number | 5305-01-179-1259 |
|---|---|
| Item name | Setscrew |
| Part number (commercial reference) | MIL-DTL-18240F |
| Unit of issue | EA |
| NIIN | 011791259 |
| NIIN assigned by | United States (NCB code 01) |
| Federal Supply Class (FSC) | 5305 — Screws |
| Federal Supply Group (FSG) | 53 — Hardware and Abrasives |
| Unit price (USD) | $4.50 |
| 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 setscrew. Confirm controlling dimensions against your drawing or standard sheet before ordering.
| Fastener Length | 0.541 Inches Minimum And 0.571 Inches Maximum |
|---|---|
| Head Style | Headless (Setscrew) |
| Material | Copper Alloy Point |
| Material | Plastic Locking Feature |
| Material | Steel Fastener |
| Nominal Thread Diameter | 0.375 Inches |
| Surface Treatment | Cadmium Fastener And Chromate Fastener |
| Thread Class | 2A |
Externally threaded fasteners designed to be turned to assemble or adjust parts, including machine screws, cap screws, socket-head cap screws, set screws, self-tapping and thread-forming screws. This is the largest single class in the U.S. supply system and covers a vast range of thread sizes, drive types, head styles, and materials.
Price in context. Across the 2,357 items we currently stock in FSC 5305 (Screws), published unit prices run from $0.03 to $14,752.17. At $4.50, this item sits well below the class median of $10.52 — commodity hardware usually bought in volume.
Stock activity. This item has appeared 2 times in our supplier stock feed, most recently listed 2026-08-19, with a lot quantity of 721 units. Listing activity is a practical signal of ongoing availability; confirm current stock and firm pricing on your quote.
Typical applications. Structural and panel assembly, equipment enclosures, brackets, access covers, and virtually every mechanical assembly across ground vehicles, aircraft, ships, and support equipment.
Applicable standards. ASME B18.3 / B18.6.3, MIL-DTL / NASM / MS and AN series, ISO metric threads; common materials include carbon and alloy steel, 300/400-series stainless, and A2/A4 stainless per ISO 3506.
NSN 5305-01-179-1259 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). 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.
MS51862-39C
NAS1581K3T3
CA28080-08B-8HS
DIN84-M5X12-5.8-A2L
NAS1578C4R4
NAS1578C3R7
NAS1580V3T18
NAS1580V5R15
SS5112-416
LE111-0001-3003
NAS1801-4-10
NAS1580C3R7
