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ACCU-LOK® IIA blind fastener for composite application low profile protruding head titanium.
Unit of Measure

Dash Number (Grip)

N/A 550

Grip Range - Min. Grip

N/A 0.500 in

Grip Range - Max. Grip

N/A 0.550 in

Grip Range

N/A 0.500-0.550 in

A Dia

N/A 0.635 in

D Dia

N/A 0.344 in

E Dia Max

N/A 0.343 in

F Wrench Flats

N/A 0.185 in

G Ref

N/A 0.078 in

H

N/A 0.105 in

L Ref

N/A 1.000 in

R Rad

N/A 0.040 in

T Across Hex Ref

N/A 0.500 in

Z Max

N/A 0.045 in

Minimum available grip length

N/A -150

Recommended Hole Size

N/A 0.344-0.347

J Dia Min

N/A 0.525 in

K Max

N/A 0.670 in

Break off Limits <5>

N/A 0.000-0.103

Tensile Structural Failure (Min)

N/A 4400 lb

Double Shear Min

N/A 13850 lb

Locking Torque Min

N/A 4.000 lb-in0.452 N-m

P Max

N/A 1.150 in

Material and Heat Treat

N/A Nut: 6AL-4V titanium per AMS 4928 or AMS 4967. Heat treated per MIL-H-81200 to 95 ksi shear strength minimum, maximum hydrogen 125 ppm.
Screw: A-286 per AMS 5731, AMS 5732 or AMS 5737; Heat treated to 175 ksi tensil min.
Sleeve: 304 stainless steel per AMS 5639, heat treated as required for performance.
Insert: Acetal per ASTM D4181
DryvcapTM: Mild steel.

Finish

N/A (-) Nut: KAL-GARD ANN-RO #1012 conversion coating or phosphate flouride per AMS 2486 may be used at manufacturer´s option.
Sleeve & Screw: Passivate per AMS-QQ-P-35. KAL-GARD ANN-RO #1013 conversion coating optional.
Insert: Acetal per ASTM D4181

Lubricants

N/A The following lubricants may be applied to any or all components in any combination as required for performance unless otherwise specified: Dry film lube per AS5272, Type I, everlube #812, paraffin wax, or cetyl alcohol per MIL-L-87132.

Applicable Specification

N/A Procurement specification: FCBF208
Special lube and finish: FCBF202

Material Type

N/A Titanium

Rated Shear Strength

N/A 75 KSI

Headstyle

N/A Protruding

Notes

N/A 2.Locking feature consists of three (3) indentations located 120° apart on the periphery of the nut component and approximately .040" above intersection of the nut nose angle and O.D.
3.Composite blind fastener with selected combinations of the above lubrications and finishes are specially coded and may be substituted for equivalent non-coded parts at manufacture´s option. Contact Fairchild Engineering.
4. These parts are similar to FCBF2110 except as follows:
A. Improved out-of-grip flagging capacity (screw B/O)
B. Increased blind side protrusion before and after upset
C. Increased installed weight
<5> An "L" in place of the dash (-) between the diameter dash number and the grip dash number designates modified break-off limits +.053/-.050. "EX: FCBF3003( )-6L200".
<6>Distortion shall not prevent insertion of the fastener into a ring gauge of length equal to one diameter and hole diameter equal to a minimum recommended hole size. Insertion force shall not exceed 5.0 lbs.