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ACCU-LOK® IIA blind fastener for composite application 100° flush sealing head fuel sealing, titanium.
Unit of Measure

Dash Number (Grip)

N/A 900

Grip Range - Min. Grip

N/A 0.850 in

Grip Range - Max. Grip

N/A 0.900 in

Grip Range

N/A 0.850-0.900 in

A Theo. Dia

N/A 0.635 in

B Dia Min

N/A 0.577 in

C "O" Ring X-Section

N/A 0.037 in

D Dia

N/A 0.312 in

E Dia Max

N/A 0.311 in

F Wrench Flats

N/A 0.152 in

G Ref.

N/A 0.070 in

H Ref.

N/A 0.090 in

L Ref.

N/A 0.892 in

M Across Recess

N/A 0.437 in

R Rad Max

N/A 0.040 in

Minimum available grip length

N/A -250

Recommended Hole Size

N/A 0.312-0.315

J Dia Min

N/A 0.455 in

K Max

N/A 0.550 in

Break off Limits <7>

N/A 0.015-0.103

Tensile Structural Failure (Min)

N/A 3600 lb

Double Shear Min

N/A 11350 lb

Locking Torque Min

N/A 3.500 lb-in0.400 N-m

S Max

N/A 0.026 in

T Across Hex. Ref.

N/A 0.500 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.
Corebolt: 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.
"O" Ring: BUNA-N per MIL-R-6855, Grade 60, Class I & Class II.

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: None
Dryvcap

Lubricants

N/A Screw & Sleeve: T-10-Lube 460 or KAL-GARD FA (AS5272, Type I) as required for performance.
Nut: Bare (Nut nose only may have dry film lubricant if required for performance)
"O" Ring: None

Applicable Specification

N/A Procurement specification: FCBF200 <4>
Special lube and finish codes: FCBF202

Material Type

N/A Titanium

Rated Shear Strength

N/A 75 KSI

Headstyle

N/A 100° Flush

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> These fastener are intended for installation in fuel sealing areas. Immediately prior to installation brush or swab sealant per MIL-S-8802 Type II (BMS 5-26) to the exposed screw threads between the nut body and the sleeve. Also apply sealant to the exterior serfaces of the nut body, the sleeve and the screw head.
<4> These fastener are not subject to the tension fatique requirements of FCBF200.
5. "O" Ring part number: 20113-(DIA)
<6> Distortion shall not prevent insertion of the fastener into a ring gauge of length to one diameter and hole diameter equal to minimum recommended hole. Insertion force shall not exceed 5.0 lbs.