Comparison : Item # SFHT044004C, SFHT044004C - 4-40 Studs for Thin Material
Item # SFHT044004D, SFHT044004D - 4-40 Studs for Thin Material
Item # SFHT044005C, SFHT044005C - 4-40 Studs for Thin Material
Item # SFHT044005D, SFHT044005D - 4-40 Studs for Thin Material
Item # SFHT044006C, SFHT044006C - 4-40 Studs for Thin Material