Hex spacer 1/4 x 3/8 inches #6-32 tap
Ships from US and is sold by Marco Specialties$0.75
Hex spacer 1/4 x 3/8 inches #6-32 tap
#254-5008-12
Hex spacer Post 3/8 x 1/4 inches #6-32 tap both ends.
Reference:
0.25 oz