These spacers have a clearance hole passing through its entire length with no threads. Spacers are most commonly used when you want the same fastener to pass through the entire barrel and through the panel being mounted, and have a cap screw it all together.
RC 1/10 Scale Anodized Aluminum 15MM WHEEL HUB Extension Spacer -4 pcs- RED - RC WORLD
Emmanuele Design - EMD-SPACER-20-66 - EMD Auto 20mm Wheel Spacers - Pair (With Bolts)
Buy Clutch Spring Spacer Kit .180 Thick Suzuki Hayabusa (99-20) / B-King (08-11) / ZX
Accutronix Black Anodized Smooth 49mm Custom Fender Spacer - 5/8 in. - TFS49-SF5/8B - Dennis Kirk
Ti22 Performance 4152 Seat Spacer, 1/2 to 1-1/4 in Spacers, 1 in Bar Mount, Aluminum, Black Anodized, Sprint Car, Kit
Spidertrax Offroad Wheel Spacers (Anodized Blue) - WHS003
Benchmade Taggedout 15536 Knife - CPM-S45VN Clip Point - OD Green G10 - Orange Anodized Aluminum Spacers - USA
, Qty/Pkg: 96
Anodized Aluminum Spacers for 5 x 31mm Inserts (96969) - Analytical Sales and Services, Inc.