120371 Nut Allison spare parts

120371 Nut Allison spare parts

The 120371 nut is a core fastener specifically designed for the secure connection of mechanical parts. It precisely matches the original equipment manufacturer (OEM) standards and is widely compatible with Allison transmissions and various commercial vehicles, construction machinery, and special vehicles. It is primarily used for the secure connection of key components such as gears, housings, and pipelines inside the transmission. Used in conjunction with bolts, it achieves reliable fixation between parts through the engagement of internal and external threads, transferring loads and preventing loosening. It is an indispensable basic component in mechanical assembly, directly affecting the stability and safety of equipment connection structures, and is known as the “fastening button” of industrial equipment.

Core technical parameters

-Part number: 120371
– Material Specifications: High-strength carbon steel (grade 45#), surface treated with hot-dip galvanizing for corrosion protection (galvanized layer thickness ≥8μm), conforming to GB/T 10125-2021 corrosion resistance standard, tensile strength ≥800MPa, hardness HRC 28-32
– Structure type: Hexagonal nut (standard hexagonal structure), compatible with corresponding external thread bolts, featuring a fine thread design with a thread accuracy of 6H grade, and built-in anti-loosening grooves to effectively prevent loosening caused by vibration, suitable for long-term high-vibration working conditions.
– Dimensions: Thread specification M12×1.5 (thread diameter 12mm, pitch 1.5mm), nut thickness 10mm, width across flats 18mm, head roundness error ≤0.1mm, dimensional tolerance ≤±0.03mm, conforming to DIN international standards.
– Compatible Models: Precisely compatible with Allison 1000/2000 series transmissions, suitable for various commercial vehicles, construction machinery, and special vehicles equipped with this series of transmissions. Also compatible with other industrial equipment and mechanical parts fastening scenarios using bolts of corresponding specifications.
– Protective performance: Hot-dip galvanized surface treatment combined with passivation process, achieving a corrosion resistance level that meets the 48-hour salt spray test standard. It can effectively resist corrosion from humid, dusty, acid and alkali environments, adapting to harsh working conditions such as outdoor and construction sites, and preventing thread jamming and failure caused by rust.
– Product weight: 0.045±0.002kg (standard weight per unit, conforms to original factory specifications, compact size, does not increase the extra load on equipment, and is convenient for batch storage and installation).
– Service life: ≥10,000 hours under normal operating conditions, with ≥500 thread engagement cycles.

Core advantages:

The 120371 nut is an original factory specification compatible fastener with precise threads, a secure lock, and is corrosion-resistant and durable. It effectively solves industry pain points such as stripped threads, loosening, easy rusting, and poor compatibility of traditional nuts. Suitable for Allison transmissions and various mechanical fastening scenarios, it is the preferred fastener for transmission repair, equipment assembly, and component fastening. We supply directly from the source, strictly control quality, adhere to high-end fastener production standards, provide comprehensive after-sales support, support bulk purchases, and offer outstanding cost-effectiveness, helping purchasers and repair service providers reduce costs and improve efficiency.

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