Part Number
Close Tolerance Screw · NAS (National Aerospace Standard) · 3 stocked variants
Reading the part number. NAS498 breaks down as NAS498 — the National Aerospace Standard that fixes the part's design — with no dash number, denoting the base configuration.
Because NAS498 is a specification-level reference, each conforming variant carries its own National Stock Number. The table below lists every variant we stock, with its decoded characteristics and published price — open the NSN record to see the full specification and order that exact item.
| NSN | Item | Key characteristics | Unit price |
|---|---|---|---|
| 5305-00-576-2278 | Close Tolerance Screw | Fastener Length: 1.563 Inches Minimum And 1.610 Inches Maximum; Hardness Rating: 36.0 Rockwell C Minimum Overall And 40.0 Rockwell C Maximum Overall | $17.52 |
| 5305-00-720-7857 | Close Tolerance Screw | Fastener Length: 2.015 Inches Minimum And 2.062 Inches Maximum; Hardness Rating: 36.0 Rockwell C Minimum Overall And 40.0 Rockwell C Maximum Overall | $24.32 |
| 5306-00-807-2497 | Shear Bolt | Fastener Length: 1.984 Inches Nominal; Hardness Rating: 36.0 Rockwell C Minimum Overall And 40.0 Rockwell C Maximum Overall | $12.27 |
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.
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.
