These are old stock steel tubular rivets with a tube diameter of 1/8" and head diameter = 3/8". Available in length 5/8" or 9/16" only.
Black Rivets ⋆ Hill Saddlery
Semi-tubular rivets can be employed for multiple applications, such as luggage, brakes, and 3 ring binders Excellent fasteners to quickly and
Hanson Rivet E3-8-ST Steel Tubular Rivet, 3/16inches Diameter X 1/4inches Length, Oval Head (.375 Dia. X .060), ZINC Finish (Pack of 100)
Ms Tubular Rivets at Rs 95/kg, Semi Hollow Rivet in Ahmedabad
Tubular Steel Rivets identityleathercraft
Black High Tensile Special Rail Huck Bom Steel Rivets for
4oz x Solid Aircraft Rivets, 3/32 Diameter, 5/16 Long, MS20470
Buckleguy Double Cap Rivet, Black Matte, Solid Brass-LL (100 Sets per Bag), Multiple Sizes
Hollow Steel Rivet supplier and manufacturer - INT METAL factory
Stainless Steel Hollow Rivets at Rs 0.2/piece, SS Rivet in Vasai
Pan Head Metal Half Tube Semi Tubular Rivet Hollow Tubular Rivet - China Snap Head Rivets, Solid Rivets
Hollow rivets silver-coloured, 3 sizes - Alfa-G Haberdashery