Small brass cap: flat top, diamond grip pattern, threaded on the

TIMCO Threaded Screw Caps - Solid Brass - Polished Brass

Small brass cap: flat top, diamond grip pattern, threaded on the inside : r/whatisthisthing

Anderson Metals Brass 3/8 in. 9/16-24 Fine Thread Flare Cap (10/Bag) 04840-06 - The Home Depot

SmallRig Weight-Reducing Sling Handgrip Kit Shoulder Strap for DJI RS 3 / RS 3 Pro / RS 2 / RSC 2 4383 - AliExpress

uxcell Knurled Thumb Screws, M4x25mm Flat Brass Bolts 7mm Dia.Grip Knobs Fasteners for PC, Electronic, Mechanical 2Pcs: : Industrial & Scientific

1/8ips - 1/2in x 3/4in Diamond Knurled Cap Finial with Set Screw - Unfinished Brass

Brass Lamp Caps

1/8ips - 1/2in x 3/4in Diamond Knurled Cap Finial with Set Screw - Unfinished Brass

FastCap Five Point Knob ~ 3/8-16 Female Thread – Hardwick & Sons

B&P Lamp® 8/32 Knurled-Head Thumb Screw, 3/8 Lenght: : Industrial & Scientific