KFN600

K-FAST® SYSTEMS

ENGINEERING COMMITTEE

K-FAST IS A REGISTERED TRADE MARK OF KAYNAR, A MICRODOT COMPANY

LICENSEES:

DEUTSCH FASTENER CORPORATION

VIO-SHAN / A DIVISION OF VSI CORP.

SPS TECHNOLOGIES INCORPORATED

MATERIAL: 7075 ALUMINUM ALLOY PER QQ-A-225/9 OR 7175 ALUMINUM ALLOY PER QQ-A-430. HEAT TREATED –
T73 CONDITION. FINISH: KFN600 -(*) — ANODIZED PER MIL-A-8625, DYE RED COLOR, AND CETYL ALCOHOL LUBRICANT.

KFN600B(*) — ANODIZED PER MIL-A-8625, DYE BLUE COLOR, AND CETYL ALCOHOL. (FOR OVERSIZE PINS).

KFN600D(*) — ANODIZED PER MIL-A-8625, DYE BROWN COLOR, AND CETYL ALCOHOL. (FOR ALUMINUM PINS).
KFN600F(*) — ANODIZED PER MIL-A-8625, AND SOLID FILM LUBRICANT PER MIL-L-8937.

KFN600N(*) — ANODIZED PER MIL-A-8625, AND SOLID FILM LUBRICANT PER LUBECO 905.

21 PERFORMANCE: MIL-N-25027, EXCEPT AS NOTED. MAXIMUM LOCKING AND MINIMUM BREAKAWAY TESTS SHALL BE
LIMITED TO THREE SEATED INSTALLATION AND REMOVAL CYCLES, USING CADMIUM PLATED ALLOY STEEL BOLTS WITH

THREADS CONFORMING TO BPS-F-67 AND BACB30FM.

BREAKAWAY TORQUE TEST TO BE PERFORMED AFTER THE NUT HAS BEEN INSTALLED TO INSTALLATION

TORQUE (SEATING TORQUE) BY THE NORMAL FACTORY INSTALLATION METHOD AND THE PRELOAD REMOVED FROM THE
NUT WITHOUT NUT ROTATION. THREAD PROTRUSION DURING THE BREAKAWAY TORQUE TEST

SHALL BE A MINIMUM OF ONE THREAD. THE NUT SHALL BE SEATED TO INSTALLATION TORQUE ON ALL THREE
CYCLES.

APPLICATION: FOR USE ON STANDARD TO. 032 OVERSIZE SHANK BOLTS. PACKAGING: PARTS ARE NORMALLY
SUPPLIED IN BULK PACKAGING.

ADD “S” AFTER DASH NUMBER FOR SPINDLE PACKAGED NUTS FOR USE WITH K-FAST AUTOMATIC TOOLS. EXAMPLE:
KFN600 – 35.

NOTES: ▲ 1. “D” DIAMETER
CONCENTRIC TO THREAD PITCH DIAMETER WITHIN .005 TIR FOR -5 AND SMALLER SIZES, AND .006 TIR FOR LARGER SIZES.

2. H600 AND KFN600 ARE DIMENSIONALLY AND FUNCTIONALLY INTERCHANGEABLE.

K.E.C.

K-FAST® ENGINEERING COMMITTEE

TITLE

PART NUMBER

800 SOUTH STATE COLLEGE BLVD.

NUT – K-FAST, 6 POINT, SHEAR PIN

KFN600 – (*)

FULLERTON, CALIFORNIA 92631

PART NO.

THREADS PER MIL-S-8879

A

B

MIN

C

MIN

D

H

MAX

M

S

MIN

W

AXIAL TENSILE STRENGTH LBS MIN

REC’M SEATING TORQUE IN-LBS

MAX LOCKING TORQUE IN-LBS

APPROX WEIGHT LBS/100

08

.1640-32UNJC-3B

.292

.288

.273

.242

.202

.198

.270

.112

.102

.060

.220

.212

1,400

15-25

7

.07

3

.1900-32UNJF-3B

.322

.318

.295

.277

.228

.224

.280

.112

.102

.070

.251

.243

1,600

25-35

12

.09

KFN600-

4

.2500-28UNJF-3B

.422

.418

.398

.348

.288

.284

.340

.117

.107

.090

.313

.305

3,000

60,80

17

.18

5

.3125-24UNJF-3B

.538

.532

.497

.419

.350

.346

.430

.127

.117

.160

.376

.367

5,000

130-160

35

.33

6

.3750-24UNJF-3B

.649

.642

.577

.491

.413

.409

.470

.127

.117

.180

.439

.430

7,000

200-240

40

.55

7

.4375-20UNJF-3B

.740

.730

.677

.561

.476

.472

.565

.142

.132

.220

.502

.492

9,500

270-330

60

.75

8

.5000-20UNJF-3B

.860

.850

.777

.631

.538

.534

.615

.142

.132

.260

.564

.553

12,500

370-430

85

1.05

PART NO.

THREADS PER MIL-S-8879

A

B

MIN

C

MIN

D

H

MAX

M

S

MIN

W

AXIAL TENSILE STRENGTH LBS MIN

REC’M SEATING TORQUE IN-LBS

MAX LOCKING TORQUE IN-LBS

APPROX WEIGHT LBS/100

08

.1640-32UNJC-3B

.292

.288

.273

.242

.202

.198

.270

.112

.102

.060

.220

.212

1,400

15-25

7

.07

3

.1900-32UNJF-3B

.322

.318

.295

.277

.228

.224

.280

.112

.102

.070

.251

.243

1,600

25-35

12

.09

KFN600-

4

.2500-28UNJF-3B

.422

.418

.398

.348

.288

.284

.340

.117

.107

.090

.313

.305

3,000

60,80

17

.18

5

.3125-24UNJF-3B

.538

.532

.497

.419

.350

.346

.430

.127

.117

.160

.376

.367

5,000

130-160

35

.33

6

.3750-24UNJF-3B

.649

.642

.577

.491

.413

.409

.470

.127

.117

.180

.439

.430

7,000

200-240

40

.55

7

.4375-20UNJF-3B

.740

.730

.677

.561

.476

.472

.565

.142

.132

.220

.502

.492

9,500

270-330

60

.75

8

.5000-20UNJF-3B

.860

.850

.777

.631

.538

.534

.615

.142

.132

.260

.564

.553

12,500

370-430

85

1.05