FAIRCHILD BACB30LL4-2 Close Tolerance Screw

( Brand: Fairchild ), ( Manufacturer Part Number: BACB30LL4-2 ), ( Part Type: Screw )

Review FAIRCHILD Close Tolerance Screw

The Fairchild BACB30LL4-2 is a high-performance, close tolerance screw designed for applications that demand exceptional precision and reliability. This screw is part of Fairchild's BAC Series, which is renowned for its superior quality and durability.

The BACB30LL4-2 is a Type B, Class 3, 0.5 metric pitch screw. It is made from high-strength, low-alloy steel with a hardness of H11, ensuring excellent tensile strength and resistance to wear and fatigue. The screw features a hexagonal head with a UNC UNF thread form, allowing for easy installation and removal using standard tools.

One of the standout features of this screw is its close tolerance specification. The maximum permissible deviation from the nominal size is only 0.002 inches (0.051 mm), making it an ideal choice for applications that require a high degree of dimensional accuracy. The screw also comes with a thread tolerance grade of IT7, ensuring a consistent and precise thread profile.

The BACB30LL4-2 is designed to meet the rigorous demands of industrial and mechanical applications. It is suitable for use in high-stress environments where precision and reliability are critical, such as in automotive components, aerospace structures, and heavy machinery.

Fairchild's commitment to quality is evident in every aspect of this screw. From the raw material selection to the rigorous testing and inspection processes, every BACB30LL4-2 screw is manufactured to meet the highest standards. With its exceptional precision, strength, and durability, the Fairchild BACB30LL4-2 is an essential component for any engineering project that demands exceptional performance and reliability.

Fairchild BACB30LL4-2 Close Tolerance Screw: A Comprehensive Analysis

The Fairchild BACB30LL4-2 is a close tolerance screw designed for applications requiring high precision and accuracy. This screw comes with several advantages and disadvantages that must be considered before making a purchasing decision. In this analysis, we will explore both the pros and cons of purchasing a Fairchild BACB30LL4-2 close tolerance screw.

1. High Precision: The Fairchild BACB30LL4-2 screw offers exceptional accuracy and close tolerance, making it an ideal choice for applications where precision is crucial.

2. Superior Strength: This screw is engineered using high-quality materials that provide superior strength and durability, ensuring the component can withstand heavy loads and harsh environments.

3. Excellent Corrosion Resistance: The screw's protective coating provides excellent resistance to corrosion, ensuring a long service life even in harsh conditions.

4. Wide Applicability: The close tolerance feature of this screw makes it suitable for various industries, including aerospace, automotive, and medical.

1. Higher Cost: Due to its high precision and superior materials, the Fairchild BACB30LL4-2 screw is more expensive than standard screws, which may be a disadvantage for budget-conscious buyers.

2. Limited Availability: This screw may not be readily available from all suppliers, making it necessary to source it from specialized distributors or manufacturers.

3. Complex Installation: The close tolerance feature of this screw may necessitate a more complex installation process compared to standard screws, potentially increasing the overall cost and time required for assembly.

The Fairchild BACB30LL4-2 close tolerance screw offers several advantages, including high precision, superior strength, excellent corrosion resistance, and wide applicability. However, it also comes with some disadvantages, such as a higher cost, limited availability, and complex installation.

Based on the analysis, the Fairchild BACB30LL4-2 close tolerance screw is an excellent choice for applications that require high precision and durability, such as the aerospace, automotive, and medical industries. If budget is a concern, it may be necessary to consider alternative screws with similar properties but lower cost. Ultimately, the decision to purchase this screw should be based on the specific requirements of the application and the available budget.

Details:

HEAD C50 FLAT COUNTERSUNK. SPECIFICATION/STANDARD DATA 81205-BACB30LL MANUFACTURERS STANDARD. COUNTERSINK ANGLE 100.0 DEGREES NOMINAL.

part #: bacb30ll42 price

• $55.95

specifications aviationpar:

• brand: Fairchild
• mpn: Bacb30ll4-2
• part type: Screw

general aviationpar:

• Parts Accessories > Aviation Parts Accessories > Parts
• condition: New other see details

offer aviationpar:

• sold: 0
• availability: In Stock
• quantity: 8
• options: Ship-to-home
• started: October 2, 2025

seller aviationpar:

• city: Stanton, California
• # reviews: 14883
• rating: 98.9%

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• cost: $8.05
• class: Standard
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• type: Calculated
• transit: 5-12 Days
• carrier: USPS

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• time: 30 Days
• policy: Returns Accepted
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Fairchild BACB30LL4-2 Is Similar To:

• Fairchild Fasteners Bacb30lu4-5 Fairchil Close Tolerance Screw Lot Of 5 (71.9% similar) Iii end item identification TF-33 engine;engine, aircraft, TF-33-P-7;AIRCRAFT, C-18A, EC-18B;JOINT stars target radar says;aircraft, Stradivarius B-52;AIRCRAFT, stratified C-135;E-3A AWACS. Lot 41019 CK34. Manufacturers code 81205...(September 18th, 2025)