Knurled-head hinge pins with a turned groove for an external C-clip. 1045 steel machined components, bare finish, deburred, no heat treatment. Dimensions in inches. Initial design; no hinge load rating assigned. Verify free movement and ring seating after installation.
Pin diameter 0.2500 (+.000/-.002); barrel bore 0.2540 (+.002/-.000); barrel OD 0.500 (+.000/-.005). Knurled head OD 0.500 (+.000/-.025), head thickness 0.250 (+/-.003). Groove diameter 0.229-0.232, groove width 0.029-0.032, bottom radius 0.003 maximum. End land 0.188 (+/-.003). No cotter-pin cross-hole.
Select grip to groove A: distance from underhead face to head-side groove wall, tolerance +/-.003. A = three matching barrel lengths plus .100 nominal clearance. This is not overall pin length.
Length choices: A 1.600 / overall reference 2.0685 / matching barrel length 0.500; A 2.350 / overall reference 2.8185 / matching barrel length 0.750; A 3.100 / overall reference 3.5685 / matching barrel length 1.000.
Compatible clip: Rotor Clip SH-25ST PD external retaining ring (C-clip with plier holes). 100 identical knurled-head hinge pins. C-clips and barrels excluded. Cart quantity 1 = 100 pins.
Manufacturing reference: MMW-HNG-001 Rev A. Use common sheets 1-3 and the matching shaft-size schedule. Variant SKUs match print part numbers. Prices are per sales pack; shipping extra.