1/4"-20 Thread Size, 1/4 in Bolt Size, Spring Nut - 2HAL7|V200 1/4S2 - Grainger
B-Line N524ZN 1/4 Inch 20 Thread Spring Nut | Cooper Electric
Superstrut 1/2-in Spring Strut Nut at Lowes.com
Adamax 1/4-in Spring Strut Nut, Silver Electroplated, Electro-Galvanized, Spring Style, Strut Accessory Size 1/4-in in the Strut Accessories department at Lowes.com
Spring Loaded Tee Nut – BULK-MAN 3D
P1006 - CHANNEL NUTS W/SPRING (1-5/8" SERIES)
Strut & Channel Spring Nuts | TechLine Mfg
1/2" Spring Nut BUNDLE for C-Channel (Qty 25) - SAFE-T-PROOF
Spring Nuts - Wireless Supply
Spring Nut Supplier - Strut Channel Nuts | The Dale Company
Strut Channel Nuts, 3/8-16 Short Spring Channel Nuts with Zinc Electroplate Finish, Short Spring Nuts Great for Use with Strut Channel (10 Pack): Amazon.com: Industrial & Scientific