YF-84F
Two swept-wing prototypes of the F-84F, initially designated YF-96.

F-84F Thunderstreak
Swept wing version with Wright J65 engine.
Tactical Air Command aircraft were equipped with Low-Altitude Bombing System (LABS) for delivering nuclear bombs.
2,711 built, 1,301 went to NATO under Mutual Defense Assistance Program (MDAP).

GRF-84F
25 RF-84Fs were converted to be carried, and launched from the bomb bay of a GRB-36F bomber as part of the FICON project.
The aircraft were later redesignated RF-84K.
RF-84F Thunderflash
Reconnaissance version of the F-84F with intakes relocated to the wing-roots, 715 built.

RF-84K Thunderflash (FICON)
RF-84F with a retractable probe for hookup with carrier GRB-36Ds and tailplanes with marked anhedral, 25 redesignated from RF-84F.
XF-84H
Two F-84Fs were converted into experimental aircraft.
Each was fitted with an Allison XT40-A-1 turboprop engine of 5,850 shaft horsepower (4,365 kW) driving a supersonic propeller.
Ground crews dubbed the XF-84H the Thunderscreech due to its extreme noise output.

YF-84J
Two F-84Fs were converted into YF-84J prototypes with enlarged nose intakes and a deepened fuselages for the General Electric J73 engine; the YF-84J reached Mach 1.09 in level flight on 7 April 1954.
The project was cancelled due to the excessive cost of converting existent F-84Fs.
YF-84F
Two swept-wing prototypes of the F-84F, initially designated YF-96.
F-84F Thunderstreak
Swept wing version with Wright J65 engine. Tactical Air Command aircraft were equipped with Low-Altitude Bombing System (LABS) for delivering nuclear bombs. 2,711 built, 1,301 went to NATO under Mutual Defense Assistance Program (MDAP).
GRF-84F
25 RF-84Fs were converted to be carried, and launched from the bomb bay of a GRB-36F bomber as part of the FICON project. The aircraft were later redesignated RF-84K.
RF-84F Thunderflash
Reconnaissance version of the F-84F with intakes relocated to the wing-roots, 715 built.
RF-84K Thunderflash (FICON)
RF-84F with a retractable probe for hookup with carrier GRB-36Ds and tailplanes with marked anhedral, 25 redesignated from RF-84F.
XF-84H
Two F-84Fs were converted into experimental aircraft. Each was fitted with an Allison XT40-A-1 turboprop engine of 5,850 shaft horsepower (4,365 kW) driving a supersonic propeller. Ground crews dubbed the XF-84H the Thunderscreech due to its extreme noise output.
YF-84J
Two F-84Fs were converted into YF-84J prototypes with enlarged nose intakes and a deepened fuselages for the General Electric J73 engine; the YF-84J reached Mach 1.09 in level flight on 7 April 1954. The project was cancelled due to the excessive cost of converting existent F-84Fs.
Republic F-84F Thunderstreak