The ATRO HM62-64M31 is a high-performance, polyurethane hood guide pin designed to replace standard rubber components that frequently fail under heavy engine heat and vibration.Specifically engineered for Mack truck applications, this poly pin ensures proper hood alignment and reduces rattling, protecting your hood and latching mechanisms from premature wear.
Unlike traditional rubber hood guides that can crack, rot, or compress over time, ATRO’s proprietary polyurethane formula is resistant to oil, grease, road chemicals, and extreme temperatures. This "Poly Pin" maintains its shape and structural integrity, providing a consistent, secure seat for your hood for a much longer service life than OEM rubber.
| Attribute | Value |
| Part Number | HM62-64M31 |
| Material | Proprietary Polyurethane (ATRO Poly) |
| Overall Length | 4-1/16" |
| Outside Diameter (Large) | 3-5/16" |
| Outside Diameter (Small) | 1-1/2" |
| Thread Size | 3/8"-24 UNF x 1-1/8" |
| Quantity Per Vehicle | 2 |
This part is a direct high-durability replacement for the following brand part numbers:
Mack: 25QM31
PAI: FGP-5163-BLU, FGP-5136
TRP Parts: M175270
Severson: A80BL2204
Dyco: D26M, D026M, DT26M
⚠️ Fitment Note: This pin is specifically designed for MACK ONLY. It will not fit Kenworth applications.
Atro Polyurethane Advantage: Designed to outlast rubber 3 to 1. It won't break down when exposed to engine fluids or UV rays.
Precision Alignment: The dual-diameter design (3-5/16" to 1-1/2") ensures the hood centers itself perfectly every time it is closed.
Noise Reduction: Absorbs vibration to eliminate annoying hood "chatter" and cab noise.
Easy Installation: Comes with a standard 3/8"-24 UNF threaded stud for a direct bolt-on replacement.
ATRO is a leader in heavy-duty polyurethane solutions. By replacing your worn Mack hood guides with the HM62-64M31, you are investing in a component that improves vehicle uptime and reduces maintenance costs. ATRO parts are engineered to solve the common failure points of original equipment.
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