The collection of 21 rivets/pins/studs/washers was made in Blender 4.1

Render 1200x600 px jpeg (Cycles)

Transformations has been reset and model is placed at scene origin [0, 0, 0 XYZ].

Textures PBR metal-rough 2048x2048 png

• base color
• roughness
• heigh
• normal
• metallic

Models are not triangulated and consist mainly of quadrilaterals (the number of triangles is minimized, but due to the geometry of the thread, it is not possible to completely abandon them).

Each model has a ready-made UV-map without overlap

Rivets, pins, studs and washers (sizes and number of polygons/vertices)

• c-washer (diameter 0.25 m, height 0.016 m / 4122 polygons and 4124 vertices)
• circle cotter pin (diameter 0.3 m, height 0.05 m / 2128 polygons and 2114 vertices)
• clinch stud (diameter 0.155 m, height 0.4 m / 3170 polygons and 3132 vertices)
• conical head rivet (diameter 0.149 m, height 0.32 m / 832 polygons and 802 vertices)
• conical washer (diameter 0.25 m, height 0.026 m / 2560 polygons and 2560 vertices)
• countersunk head rivet (diameter 0.119 m, height 0.28 m / 672 polygons and 642 vertices)
• countersunk washer (diameter 0.25 m, height 0.04 m / 2496 polygons and 2496 vertices)
• crescent washer (width 0.15 m, legnth 0.29 m height 0.08 m / 8448 polygons and 8440 vertices)
• dome washer (diameter 0.25 m, height 0.05 m / 2048 polygons and 2048 vertices)
• double end stud (diameter 0.08 m, height 0.8 m / 6008 polygons and 6766 vertices)
• external tooth washer (diameter 0.25 m, height 0.02 m / 3528 polygons and 3480 vertices)
• fender washer (diameter 0.25 m, height 0.006 m / 128 polygons and 128 vertices)
• flat head rivet (diameter 0.1 m, height 0.12 m / 672 polygons and 642 vertices)
• fully threaded stud (diameter 0.06 m, height 0.64 m / 5712 polygons and 5674 vertices)
• hair pin cotter pin (width 0.179 m, length 0.48 height 0.02 m / 1560 polygons and 1538 vertices)
• internal tooth washer (diameter 0.25 m, height 0.014 m / 1896 polygons and 1896 vertices)
• non threaded clevis pin (diameter 0.235 m, height 0.52 m / 1056 polygons and 992 vertices)
• shoulder washer (diameter 0.25 m, height 0.08 m / 2880 polygons and 2880 vertices)
• snap head rivet (diameter 0.11 m, height 0.32 m / 672 polygons and 642 vertices)
• split pin (width 0.02 m, length 0.48 m, height 0.07 m / 1656 polygons and 1657 vertices)
• split washer (diameter 0.25 m, height 0.04 m / 1090 polygons and 1092 vertices)

Formats:

• blend 
• fbx 
• obj