29500738 Screw Allison spare parts

29500738 Screw Allison spare parts

The 29500738 screw is an OE-grade fastening accessory specifically developed for critical connection parts of Allison heavy-duty automatic transmissions. Manufactured in strict accordance with the SAE J429 high-strength fastener standard and original factory drawings, it has passed ISO 9001 quality certification and salt spray corrosion testing. Balancing high strength, anti-loosening properties, and compatibility, it is widely used in Allison 1000/2000 series and 3000/4000 series transmissions in heavy-duty equipment such as heavy trucks, construction machinery, and public transportation. It is suitable for core scenarios such as transmission valve body assembly fixing, clutch end cover sealing and fastening, and sensor mounting base connection. It precisely solves industry pain points such as screw vibration loosening, corrosion and rust, stripping and breakage, and seal failure under heavy-duty conditions, extending transmission life, reducing secondary maintenance costs, and ensuring the connection stability and safety of core transmission components.

Core technical parameters:

– Product Model: 29500738
– Material specifications: 12.9 grade alloy steel (tensile strength ≥1220MPa), tempered heat treatment process, thread accuracy reaches 6g grade, tolerance ≤±0.02mm, zinc-nickel alloy electroplating on the surface (thickness 8-12μm), and the head is pre-coated with an anaerobic locking coating (Loctite 243 equivalent).
– Operating temperature: -40℃~150℃
– Performance grade: Grade 12.9 high strength, tensile strength ≥1220MPa, yield strength ≥1040MPa, shear strength ≥940MPa, far exceeding ordinary Grade 8.8 fasteners.
– Specifications and dimensions: M8×35mm (internal hexagonal head, fully threaded design)
– Corrosion resistance: Zinc-nickel alloy electroplating treatment, salt spray test duration ≥1000 hours.
– Compatible Models/Scenarios: Core compatibility with Allison 1000/2000 series and 3000/4000 series heavy-duty transmissions, widely used in heavy-duty equipment such as heavy trucks, construction machinery, and public transportation. It is compatible with the fastening of key parts such as transmission valve bodies, clutch end covers, and sensor bases, and can directly replace the original corresponding model screws, meeting the maintenance needs of transmission overhaul and component replacement.
– Service life: Under normal operating conditions, the fatigue life is ≥10^6 cycles, and the service life can reach more than 15,000 hours.

The 29500738 screw, with its ultra-high strength of Grade 12.9, precise original factory fit, and dual protection against loosening and corrosion, has become the standard fastener for Allison gearbox overhauls and core component fixing. We strictly control the production process; each product undergoes tensile strength testing, locking performance testing, dimensional accuracy calibration, and salt spray corrosion testing to ensure compliance with original factory standards, SAE J429 standards, and industrial usage requirements. We also provide comprehensive after-sales support and standardized packaging for bulk purchases, resolving various issues customers encounter during procurement and use, and contributing to the reliable operation and maintenance of heavy equipment gearboxes.

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