Comparison : |
Item # SCRW53.51, Square Positive with ISO Style Hole, thickness 0.228 / 0.236 in Item # SCRW531, Square Positive with ISO Style Hole, thickness 0.198 / 0.206 in Item # SCRW541, Square Positive with ISO Style Hole, thickness 0.260 / 0.268 in Item # 819020R1.2, Square Positive with ISO Style Hole, thickness 0.198 / 0.206 in Item # SPRW430, Square Positive with ISO Style Hole, thickness 0.198 / 0.206 in
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