Hex spacer 5/16 x 4.92 inch #6-32 taps
Ships from US and is sold by Marco Specialties$3.95
Hex spacer 5/16 x 4.92 inch #6-32 taps
#254-5018-04
Hex spacer post 4.92 inch x 5/16 inch with 6-32 tap at both ends.
Reference:
0.656 oz