ZLoc® Panel Fasteners

Skybolt ZLoc® Stainless Series Fasteners

Skybolt manufactures studs and buttons similar to existing designs.

Dzus is a registered trademark of the Dzus Fastener Co. Skybolt has

no affiliation with Dzus Fasteners.

Design Selection Procedure:

1. From the information in the following table, consider a Stud type.

2. Select type of retainer (grommet or GP type retainer).

3. From charts, select Stud and S Spring combination for the application.

Standard Line

Fastener Size

Performance

Locked Serive

Tension (LBS)

Max. Tension W/O

Distortion (LBS)

110

125

Rated Shear (LBS)

100

150

200

300

350

Wear Life (Uses)

25M

40M

Max. sheet separation at 150% of locked service

tension = 3/64".

STUDS - Hardened Carbon Steel - Cadmium Plated per QQ-P-416, Type II, Class 2.

and 300 Series Stainless (Skybolt Stainless ZLoc® Series Fasteners are TSO-C148 )

Note: SKYBOLT manufactures and stocks stainless ZLoc® Series studs.

WING HEAD STUD

Type AW,AJW,FW,FAW,FJW

Note: AJ, FJ, AJW, and FJW studs have a long undercut and are a direct replacement for A and F studs. FA studs (common to WWII aircraft)

available in 303 Stainless.

STUD RETAINERS

Type GA and GF Grommets are aluminum.

Type GP Retainer is Nylon

Type GA Full Grommet

Type GF Full Grommet

Type GP Half Grommet

For use with all Studs

For use with Flush

For use with all Studs

except Flush Head

Head Studs (FJ Studs)

RECEPTACLE - S SPRING

Cadmium plated music wire.

Type SA Spring

PG 32

Skybolt Aircraft ZLoc®

Studs

Drill

Head

Outer

Support

Rivet

Typical

Size

Panel

Spacing

Size

Stud Size

A max

3-25

0.325

0.250

5/16

7/32

3/8

5/8

3/32

3-30

0.375

0.300

4-30

0.400

0.300

7/16

5/16

3/4

3/32

4-35

0.450

0.350

4-40

0.500

0.400

5-35

0.475

0.350

9/16

3/8

5/8

1/8

5-40

0.525

0.400

5-45

0.575

0.450

5-50

0.625

0.500

5-55

0.675

0.550

6-40

0.550

0.400

5/8

7/16

1-3/8

1/8

6-45

0.600

0.450

6-50

0.650

0.500

6-55

0.700

0.550

6.5-40

0.570

0.400

11/16

1/2

1-3/8

1/8

6.5-45

0.620

0.450

6.5-50

0.670

0.500

6.5-55

0.720

0.550

7-40

0.575

0.400

3/4

17/32

1-1/16

1-7/16

1/8

7-50

0.675

0.500

7-60

0.775

0.600

Note: B* is oversize to allow relief for grommet/retainer or dimpled panels.

S SPRING

Stud Grommet/Retainers

RECEPTACLES

GA and GF Full Grommet/Retainer

GP Plastic Retainer

S Spring

Stud

Panel (P)

Type

Part#

Size

Thickness

Size

S3-150

.015-.025

GA3-175

7/32

0.015

GP3B

5/16

.035

S3-175

.026-.050

GA3-200

Size

S4-200

.051-.094

GA3-250

S4-225

.015-.025

GA4-225

GF4-125

5/16

0.025

GP4B

7/16

.035

Size

S5A-200

.026-.050

GA4-250

GF4-150

S5A-225

.051-.075

GA4-275

GF4-175

S5A-250

.076-.100

GA4-300

GF4-200

S5A-275

.031-.062

GA5-312

GF5-175

3/8

0.028

GP5B

9/16

.035

S5A-300

.063-.094

GA5-350

GF5-225

S5A-325

.095-.125

GA5-375

GF5-250

Size

S6A-225

.040-.065

GA6-350

GF6-218

7/16

0.028

GP6B

5/8

.045

6 & 6.5

S6A-250

.066-.100

GA6-375

GF6-250

S6A-275

.101-.135

GA6-425

GF6-300

S6A-300

6.5

Max .062

GF6.5-218

1/2

0.035

GP6B

5/8

.045

S6A-400

.063-.093

GA6.5-375

GF6.5-250

S6A-425

.094-.200

GA6.5-500

Size

S7A-225

.050-.095

GA7-375

GF7-250

17/32

0.040

S7A-250

.096-.156

GA7-475

GF7-325

S7A-275

.157-.218

GA7-525

GF7-400

S7A-300

Total Thickness Charts

Choose correct chart for Stud Size. Enter Total Thickness column and select Stud/Spring combination

Size 3 Stud, SK3 Spring

Size 4 Stud, SK4 Spring

Size 5 Stud, SK5 Spring

Size 6 & 7 Stud, SK6 & 7 Spring

Use

Total

Stud

Spring

Total

Stud

Spring

Total

Stud

Spring

Total

Stud

Spring

Thickness

Dim L

Dim H

Thickness

Dim L

Dim H

Thickness

Dim L

Dim H

Thickness

Dim L

Dim H

.045-.069

-20

-175

.100-.124

-30

-225

.055-.079

-30

-275

.140-.164

-40

-300

.070-.094

-20

-150

.125-.149

-30

-200

.080-.104

-30

-250

.165-.189

-40

-275

.095-.119

-25

-175

.150-.174

-35

-225

.105-.129

-30

-225

.190-.214

-40

-250

.120-.144

-25

-150

.175-.199

-35

-200

.130-.154

-30

-200

.215-.239

-40

-225

.145-.169

-30

-175

.200-.224

-40

-225

.155-.179

-40

-275

.240-.264

-50

-300

.170-.194

-30

-150

.225-.249

-40

-200

.180-.204

-40

-250

.265-.289

-50

-275

.205-.229

-40

-225

.290-.314

-50

-250

Determine Total Thickness by adding:

.230-.254

-40

-200

.315-.339

-50

-225

1) Outside Panel Thickness (P)

.255-.279

-50

-275

.340-.364

-60

-300

2) Inside (Support) Panel Thickness (Q)

3) Grommet Thickness (T) if GA or GF grommet used.

4) Allow for gasket material or paint build-up. Allow for panel face misalignment.

PG 33

ZLoc® Fastener Principles and Design Options

Skybolt SK EHF Ejector Series

Skybolt SK EJ Ejector Series

SKEHF5 and SKEHF6 Self Ejecting Fasteners provide

SKEJ Series Ejecting Fasteners utilize a threaded

ZLoc® 1/4-turn action with studs that eject from

backing collar to secure fastener to outer panel.

the receptacle when opened. Ejected studs won't

Made from exclusive Skytanium®, the fastener has the

hang up when sliding or curved panels are removed

same strength rating as the SKEHF5 Series, is 30% lighter,

and give visual sign of unlocked fastener. The

with superior finish.

Stud assembly is riveted to the panel with 1/8"

No more ugly rivets!

rivets or screws.

Head

Total*

Head

Total*

SKEHF

Diameter

Thickness

SKEJ

Diameter

Thickness

SKEHF5-40

5/8

.40

.075-.125

SKEJ-40A

3/4

.50

.075-.125

SKEHF5-50

5/8

.50

.150-.225

SKEJ-50A

3/4

.60

.150-.225

SKEHF5-50

5/8

.50

.150-.225

SKEJ-50AW

3/4

.60

.150-.225

SKEHF5-55

5/8

.55

.225-.275

SKEJ-55A

3/4

.65

.225-.275

SKEHF5-60

5/8

.60

.275-.325

SKEJ-60A

3/4

.70

.275-.325

SKEHF5-65

5/8

.65

325-.425

SKEJ-65A

3/4

.75

325-.425

SKEHF6-40*

3/4

.40

.050-.100

SK-BN1

Standard Collar .125 Panel

SKEHF6-50*

3/4

.50

.100-.175

SK-BN2

Optional Collar .187 Panel

SKEHF6-55

3/4

.55

.200-.250

SK-BN3

Optional Collar .250 Panel

SKEHF6-60

3/4

.60

.250-.300

Use LockTite to retain threaded BN collar

SKEHF6-65

3/4

.65

.300-.350

*Note: Total Thickness figures are for most applications using either the SK5-325 height springs or SK6-375 height springs.


		Skybolt ZLoc® Series Fasteners - Racing

PG 34

Steel and Skytanium®

Skytanium Strength Ratings Equivalent to Alloy Steel

1/3 the Weight of Steel Buttons

Skybolt Oval Head Buttons

Skybolt Flat Head Buttons

#5 Series 9/16 Head Diameter Torque 40 in-lb

Steel

Skytanium®

Total*

Steel

Skytanium®

Total*

Part#

Load

Total Lgth

Thickness

Part#

Load

Total Lgth

Thickness

SKAO5-50

ZGO5-50

800 lb

.720

.100-.175

SKFO5-50

800 lb

.640

.100-.175

#6 Series 11/16 Head Diameter Torque 60 in-lb

Steel

Skytanium®

Total*

Steel

Skytanium®

Total*

Part#

Load

Total Lgth

Thickness

Part#

Load

Total Lgth

Thickness

SKAO65-40

ZGO65-40

1000 lb

.675

.100-.175

SKFO65-40

ZGF65-40

1000 lb

.570

.100-.175

SKAO65-50

ZGO65-50

1000 lb

775

.175-.250

SKFO65-50

ZGF65-50

1000 lb

.670

.175-.250

SKAO65-55

ZGO65-55

1000 lb

.825

.250-.300

SKFO65-55

ZGF65-55

1000 lb

.720

.250-.300

SKAO65-60

ZGO65-60

1000 lb

.875

.300-.450

SKFO65-60

ZGF65-60

1000 lb

.770

.300-.450

SKAO65-65

ZGO65-65

1000 lb

.925

.450-.500

SKFO65-65

ZGF65-65

1000 lb

.820

.450-.500

*Note: Total Thickness figures are for most applications using either SK5-325 height springs or SK6-375 height springs.

Skyb

Tabs are welded to frame to serve as a spring mount

Use SSP43 1/8 Steel Pop Rivets.

SK944

SK945EHF

Use SK4-225 Spring

Use SK5-325 Spring

Use for all #4 Buttons

Use for all #5 Buttons & EHF/EJ Studs

.750 Rivet Spacing

1.000 Rivet Spacing

.100 Thick (Including Spring Dimple)

Weight = .0115 lbs

Weight = .0220 lbs

SK945 and SK946

SK945CL

Use SK5-325 or SK6-375 Spring

Use SK5-325 Spring

Use for all #5 or #6 Buttons & EHF

Use CLoc SK214-16A, 244-16, SK245 Series

1.000 Rivet Spacing (SK945)

1.000 Rivet Spacing

or 1.375 Rivet Spacing (SK946)

.100 Thick (Including Spring Dimple)

Weight = .0165 lbs

Weight = .0260 lbs

Weight = .0165 lbs

ZLoc® SPRINGS (Most Common)

SK4-225 #4 Spring

3/4" Rivet Spacing

SK5-325 #5 Spring

1" Rivet Spacing

SK6-325 #6 Spring

1-3/8 Rivet Spacing

SK6-375 #6 Spring

1-3/8" Rivet Spacing

SK-DP1

This aluminum D

Flush Head ZLoc

PG 35

Skybolt ZLoc® and Aloc Series Fasteners - Tools

SK-DT1 Panel Dimpling T

Simply tighten die set to dimple panels when using #6 SKFO65

Flush Head ZLoc® Studs.

ZLoc® - Driver

An economical tool for all #5 and #6 Series Studs.

GROMMET TOOLING - ZLoc® Aircraft Series

ZLoc® - Grommet Setting Tools

Ideal for common replacement of ZLoc® studs with

grommets. These tools will not set winged studs.

Tool

Set

SK-A3

3 Tools

SK-A4

3 Tools

SK-F4

2 Tools

SK-A5*

4 Tools

SK-F5

2 Tools

SK-F5A*

6 Tools

SK-F6.5

2 Tools

*Note: The SK-A5 tool is designed to replace grommets on Beech Bonanza cowlings without

removing brackets from cowling. SK-F5A is a complete installation set for FJ5 stud installation.

ZLoc® Spring Adjusting Tool SK-7301

Skybolt developed this handy spring adjusting tool to effectively adjust spring depth. The SK7301 Tool eliminates the need for various length buttons (ZLoc® studs).

Think about it, one stud size fits all hole applications! And, with properly adjusted springs, you eliminate troublesome fasteners that are either too tight or too loose.

The Skybolt SK7301 tool can adjust springs outward without removing the outside panel; will not bend or even mar the thinnest panel or the finest paint. To tighten

springs, the SK7301 tool is designed to pull against the spring legs, even with rivets in place. The SK7301 tool is designed for not only the chassis fabricator, it is

designed for the car owner or aircraft owner as well. The SK7301 fits both #5 and #6 springs. It works great!

To Loosen Spring (Pull Outward) ….Insert SK7301 and tighten nut 2-3 turns To Tighten Spring (Pull Inward) - Install legs and place

or as necessary over rivets, tighten 2-3 turns or as necessary.

GROMMET TOOLING - ALoc™ Series

A must to replace any ALoc Grommet.

Tool

Type Head

29693/29695

#2 Flush

9529/29667

#5 Flush

9529/29770

#5 Round

PG 36