This is the Highland 3/8" Delrin Speed Nuts - Pair
Features:
- Strong, durable alternative to traditional wingnuts
- Knurled gripping surface for easier disassembly
- Available in two thread sizes: 3/8" - fits Highland bands hardware SB725 (p/n HL407)
5/16" - fits Highland bands hardware SB800 & SB803 (p/n HL408)
Nuts are precision machined from durable Delrin material and help prevent stainless-steel to stainless-steel galling. They are a strong, durable alternative to the traditional wing nuts. "