USB SERIES \ Flat Head, Open End (~K=Knurled)

Part No.

Thread Size

Hole Size

+0.004 / -0.0

D(inch)

+0.0 / -0.004

L(inch)

±0.015

HD(inch)

±0.012

HT(inch)

+0.006 / -0.002

Grip Range

USB440/USB440K

UNC4-40

.201

.197

.386

.315

.032

0.02~0.08

USB832/USB832K

UNC8-32

.240

.236

.445

.354

.032

0.02~0.10

USB1024/USB1024K

UNC10-24

.280

.276

.493

.393

.040

0.02~0.10

USB420/USB420K

UNC1/4-20

.358

.354

.630

.512

.059

0.04~0.14

USB518/USB518K

UNC5/16-18

.437

.433

.709

.571

.059

0.04~0.16

USB616/USB616K

UNC3/8-16

.516

.512

.850

.630

.063

0.04~0.16