6-Lobe Flat Head

Nominal Size

Head Dia.(G)

Head Height(T)

Recess Dia(B)

Gage Penetration(F)

Driver Size

Max

Min

Ref.

Ref.

Min

4

.225

.209

.067

.094

.019

T8

6

.279

.257

.083

.111

.022

T10

8

.332

.308

.100

.132

.026

T15

10

.385

.359

.116

.155

.031

T20

1/4

.507

.477

.153

.200

.040

T27