F7V

Garrison94 does not list an F7V anchor standard, and MK73 does not
list an MK73 dagger standard.

iot Psc (= HD 222368) is probably the best primary standard.

JM53 standards:     iot Psc, tet Boo, tet Per, chi Dra - F7V
Houk75 standard:    iot Psc - F7V (primary standard)
Cowley76 stardards: tet Boo - F7V, HR 3794 - F7IV-V

Gray01/03/06 classify 20 nearby stars as F7V. Their median colors:
<B-V>(F7V) = 0.511 (+-0.003 sem, +-0.012 stdev; N=20)
<V-I>(F7V) = 0.579 (+-0.004 sem, +-0.022 stdev; N=20)

<B-V>(HIP) = 0.524 

# No standard

Morgan65, MK73, MorganAbt73, Cowley74, MK78, Keenan85, Corbally86,
Gray89, and GrayNstars do not list a F7V standard. MorganAbt73 lists
F6V standard (B-V=0.46) and F8V standard (B-V=0.52), but no F7V
standard. Skiff08 did not flag any stars as F7V MK standards.

# best standard
HD 222368 = iot Psc = 17 PSc = HIP 116771
  F7V: Gray01,Gray89,JM53,Jaschek64(majority),Jaschek78,Houk
  F8V: Barry70,Roman50,Kennedy83
  slightly metal poor [Fe/H] ~ -0.3 (see Cayrel01 refs)
  B-V(HIP)=0.507, Vmag=4.13, Mv=3.43, dMv=-0.42, par=72.5+-1.1 mas

# secondary standard
HD 126660 = tet Boo = HIP 70497 = HR 5404 = GJ 549A
  F7V: JM53,Barry70,Cowley76(stan),Gray01
  F7II-III: Bouw81 (unlikely given its Mv)
  No Houk type
  B-V(HIP)=0.497, Vmag=4.04, Mv=3.22, dMv=-0.57, par=68.6+-0.6 mas
  Probably OK standard if JM53, Gray, & Barry all agree its F7V
  Surprisingly lack of Teff estimates, except Taylor05 => Teff=6238

# Weak Standards
HD 16895 = tet Per = 13 Per = HIP 12777 = HR 799 = GJ 107A
  F7V: JM53,Gray01,Cowley76
  F8V: Abt81,Barry70(F8Vb)
  F6V: Roman50
  No Houk type. Lit. types have ranged F6-F8 - not a good standard?
  B-V(HIP)=0.514, Vmag=4.10, Mv=3.85, dMv=-0.05, par=89.0+-0.5 mas

HD 170153 = chi Dra = 44 Dra = HIP 89937 = HR 6927 = GJ 713
  F7V: JM53,Cowley76,Cowley67
  F7V metal-weak: Gray01
  hF8gF6mF6: Jaschek89
  F8Vb: Barry70
  F6V: Roman50 ("lines strong"), MK43(!)
  This star appears to be inappropriate for use as a standard.
  B-V(HIP)=0.489, Vmag=3.55, Mv=4.02, dMv=0.28, par=124.1+-0.5 mas

HD 82543 = HR 3794
  F6IV-V: Cowley76(stan)
  F7IV-V: MorganAbt72(stan)
  F8II: Cowley73
  F8IV: Harlan74,Cowley79(F8IV:)
  F5: Cannon
  K0III+A/F: Houk99
  Houk99 notes "HR 3794; VISUAL DOUBLE p=153°d=0.1arcsec MAGS 7.0, 7.0; vSINi<15"
  Is the Houk99 type a typo? Cowley went from F8II (1973) -> F6IV-V (1976; standard!) -> F8IV: (1979).
  Not a useful standard at this time. 

# Other Stars
Morgan65 classified 3 F7V Hyads: HD 27808, 27991, 28394.