AN174H21A - Close Tolerance Bolt
New, Sold Per Each
A close tolerance bolt is a type of precision fastener manufactured to strict dimensional tolerances, ensuring a tight fit in high-stress or critical applications. These bolts are designed to minimize movement or play in the bolted joint, providing enhanced alignment and structural integrity.
AN174 SERIES
AN standards, originally developed by the U.S. Army and Navy, cover a variety of components such as bolts, nuts, and fittings, ensuring compatibility and reliability in military and aerospace systems.
Specifications
Treatment (Surface): Cadmium - Chromate
Material: Steel
Number Of Holes: 1
Style (Head): Hexagon
Style (Hole Configuration): Hexagon Flats
Type: Drilled
Diameter (Nominal Thread): 0.250"
Thread (Class): 3A
Thread (Direction): Right-Hand
Thread (Quantity Per Inch): 28
Thread (Series Designator): Unf
Diameter (Grip): 0.2487" - 0.2492"
Diameter (Hole): 0.046" Nominal
Height (Head): 0.140" - 0.172"
Length (Fastener): 2.156" Nominal
Length (Grip): 1.688" Nominal
Length (Thread): 0.468"
Width (Between Flats): 0.428" - 0.440"
Alternate Part Numbers
NSN: 5306-00-141-4512
Unpunctuated: AN174H21A
Cancelled NSN: 5306PL1558302 (CAGE: 9009H)
Department Of The Air Force: 84H21 (CAGE: 80049)
Note: Some part numbers may serve as functional alternatives to the original, offering similar specifications and performance; however, prior verification is recommended to ensure suitability for the intended application.
Potential End Applications
AIRCRAFTS: HERCULES C-130, GALAXY C-5, SOF (AC-130H, MC-130H, EC-130E, HC-130, MC-130W)
HELICOPTERS: IROQUOIS UH-1
This list is provided for informational purposes only and includes models that may be compatible based on preliminary data. As we continue to gather more information, the list will be updated. If you're unsure about compatibility, do not use this part on your aircraft without confirming compatibility through your repair manuals or other methods.
Product Testing: Every product is inspected for accuracy, quality, and functionality before shipping to ensure it meets our high standards.
Alternate Part Numbers: With the transition from AN to MS and NAS part numbering systems, there are often multiple part numbers that meet the same specifications and performance standards. If only an alternate part number is available, we will contact you to confirm its compatibility with your application. We strongly recommend consulting the appropriate repair manuals to ensure accuracy before using an alternate part.
Model Compatibility: We are committed to providing accurate and up-to-date compatibility information for our parts. While the listed models reflect verified applications, this list is continually expanding. If your model isn’t listed, it may still be compatible, and we encourage you to consult your repair manuals to verify the required part number before placing an order. Additionally, if you believe a model should be listed, please contact us so we can update our records accordingly.
Condition: New - These parts are classified as new and come with one or more of the following supporting documents: pick tickets, packing slips, or original labels from the manufacturer. They may also include certifications such as FAA 8130, ATA 106 forms, a Certificate of Conformance (CoC) from the manufacturer, ISC Certification, FAA 121 authorization, or JAA Form 1. These documents verify the authenticity and traceability of the parts, making them suitable for regulated industries where stringent documentation is required.
Unit of Sale: Sold Per Each - This item is sold individually, with the price listed for a single unit. Perfect for purchasing the exact quantity needed without the requirement to buy in bulk. For larger quantities, consider reviewing any available bulk pricing options.
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