National Stock Number
Close Tolerance Bolt — Bolts (FSC 5306) · Part No. MS27576-4-40
| National Stock Number | 5306-01-021-1871 |
|---|---|
| Item name | Close Tolerance Bolt |
| Part number (commercial reference) | MS27576-4-40 |
| Alternate references | AS194-4-40; AS194-40-CA4510-40-MS27576-40; NASM27576; CA4510-4-40 |
| Unit of issue | EA |
| NIIN | 010211871 |
| NIIN assigned by | United States (NCB code 01) |
| Federal Supply Class (FSC) | 5306 — Bolts |
| Federal Supply Group (FSG) | 53 — Hardware and Abrasives |
| Unit price (USD) | $90.00 |
| 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 close tolerance bolt. Confirm controlling dimensions against your drawing or standard sheet before ordering.
| Fastener Length | 2.918 Inches Minimum And 2.938 Inches Maximum |
|---|---|
| Hardness Rating | 36.0 Rockwell C Minimum Overall And 41.0 Rockwell C Maximum Overall |
| Head Style | Dished Hexagon |
| Material | Steel Comp E4340 Overall Or Steel Comp 4140 Overall Or Steel Comp 8740 Overall Or Steel Comp 4130 Overall Or Steel Comp 6150 Overall |
| Nominal Thread Diameter | 0.250 Inches |
| Surface Treatment | Cadmium Overall And Chromate Overall |
| Thread Class | 3A |
| Thread Quantity Per Inch | 28 |
Externally threaded fasteners designed to be paired with a nut and used to hold two or more parts together, including hex bolts, structural bolts, eye bolts, U-bolts, plow bolts, and close-tolerance bolts.
Price in context. Across the 1,062 items we currently stock in FSC 5306 (Bolts), published unit prices run from $0.35 to $15,770.70. At $90.00, this item sits well above the class median of $20.50 — typical of assemblies and higher-value line items in this class.
Stock activity. This item has appeared once in our supplier stock feed, most recently listed 2026-07-10, with a lot quantity of 15 units. Listing activity is a practical signal of ongoing availability; confirm current stock and firm pricing on your quote.
Typical applications. Primary structural joints, chassis and frame assembly, engine mounts, and load-bearing connections where a through-bolt and nut are used.
Applicable standards. ASME B18.2.1, SAE J429 grades, ASTM A325/A490, MS/AN/NAS series; carbon, alloy, and corrosion-resistant steels with a range of plating and coating options.
NSN 5306-01-021-1871 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.
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