Compression-nut and

Gland-nut Assembly

Main Body

Assembly

Loosen with 7/64” Hex-Wrench

to Reposition Angle

O-ring

(If Applicable)

Insert-retainer

(If Applicable)

Braid/Kevlar® Folded

Back Flat Over Cable

Tape

Contacts/OFC's

Fig. 1

Pre termination distance between

conical end and cable jacket

3/8" ±1/8" (Electrical)

1/2" ±1/8" (Fiber-optic)

Calculate Length for

Contact Termination to

Rear of Connector Shell

Connector Coupling Nut

Engagement Length

Main Body Assembly

Overall Length

Eective Main Body

Assembly Length

Connector

Length

Cable Jacket

Strip-length

Mark

Fig. 2

Assembly Overview

Fig. 3

SERIES 390

BacNav™ OFS

Assembly Instructions

The following suggested procedure serves as a guide

for proper assembly and termination of Glenair P/N’s

390A084, 390G084, 390G084(-761) and 390H084

Step 1.

Cut cable to desired length, making sure to include

contact termination length and desired service loop

length (Note: service loop not applicable for ber

termination).

Step 2.

Slide BacNav OFS backshell, compression-nut and

gland-nut assembly rst, onto cable-end being

terminated. Slide insert-retainer and o-ring or adapter

(as applicable) onto cable following the backshell,

(Note: Adapter may be coupled to backshell). Unscrew

and separate intermediate compression nut and gland

assembly from main body assembly (See gure 1).

Step 3.

Determine cable jacket strip length. For precise

determination, it is recommended to terminate a

connector using a minimum strip length, then mark

the cable jacket at the required distance behind the

main body assembly. Length will include contact

termination length, desired service loop length (not

applicable for ber) and eective main body assembly

length–includes installed adapter length if present

(See gure 2).

Remove outer cable jacket exposing cable-shield

(braid) or Kevlar strength members (ber-optic

applications).

Shielded cable applications: Remove any water-

block material from cable-shield. Trim cable shield to

3-4 inch length (optional) then fold back at over outer

cable jacket and tape down (See gure 3).

Fiber-optic applications: Leave Kevlar® strength

members long, fold back over outer cable jacket and

tape down (See gure 3).

Step 4.

Prepare conductor/bers and terminate contacts/OFCs

according to specic connector requirements.

Step 5.

Insert contacts/OFCs into connector according to

specic connector requirements.

Step 6.

Move backshell main body assembly (with adapter

if present, or insert-retainer/o-ring if present)

towards cable end to mate with connector. Position

insert-retainer and o-ring if applicable, then thread

backshell/adapter-to-connector coupling nut onto

connector ensuring proper alignment/orientation

with respect to connector master-key, and verifying

proper engagement of teeth/splines to determine the

rotational orientation of the backshell as the coupling

nut is hand tightened (See Figure 4).

Step 7.

Verify cable jacket strip length, and terminate cable-

shield/Kevlar® strength members according to

following instructions. (See banding tool instructions

for banding termination process)

Braid/Kevlar® Folded Back

Flat Over Cable

Insert Retainer

(Fiber-optic)

O-ring

(Fiber-optic and

MIL-DTL-��)

Shielded cable applications: End of cable jacket

should measure 3/8” ±1/8” from conical end of main

backshell body assembly to cable jacket with service

loop length contained inside backshell. Un-tape cable-

shield and fold forward over conical end and banding

platform, ensuring even 360° distribution. Prepare

termination-band and installation tool, positioning

over center of banding platform (See gure 5).

Complete band termination (See gure 6), ensuring

cable jacket end remains ” ± �� from conical end of

main backshell body (See Figure 2).

Fiber-optic applications: Prior to banding, end of

cable jacket should measure ½” ± ” with ber-optic

conductors pulled taught (See gure 7). Un-tape

Kevlar® strength members and fold forward over

conical end and banding platform, ensuring even

360º distribution. Prepare termination-band and

installation tool, positioning over cable jacket.

Ensuring bers are pulled taught, remove all slack

from Kevlar® strength members as they are dressed

forward over the main backshell body intermediate

compression-nut threads. Holding Kevlar® strength

members tightly around the main backshell body

intermediate compression-nut threads, move band

and tool into position over banding platform (See

gure 7). Tighten termination band allowing the

Kevlar® to pull the cable jacket end towards the conical

end of main backshell body a minimum of ¼” when

the band is fully tightened (See gure 8).

IMPORTANT! This procedure ensures the Kevlar®

strength member is pre-loaded and adequate ber

slack is provided inside the backshell.

Step 8.

Trim cable-shield or Kevlar® strength members to the

end of the intermediate compression-nut threads.

Note: If desired, some extra length of cable-shield or

strength members may be tucked away in the pocket

behind banding platform under the intermediate

compression-nut threads (See gure 8).

Step 9

Move intermediate compression nut and gland

assembly into place and thread onto main body

assembly. Finish assembly by tightening all threaded

couplings including connector to adapter/backshell

coupling nut (if applicable), torque intermediate

compression-nut, gland nut and cable clamps (if

applicable) to appropriate torque values, refer to SAE

AIR6151 for appropriate values (See gure 9).

BacNav OFS is now assembled.

Fig. 8 Fig. 9

Fig. 6Fig. 5

Fig. 7

Fig. 4

*IMPORTANT: Do not pull F/O conductors

beyond taught causing preload on F.O.C.

Spring component

Fiber-optic

Conductors

Pulled Taught

(No Slack)*

Kevlar Strength

Members

Pulled Taught

(No Slack)

Hold Kevlar Firmly In

This Area

Band In Ready

Position

1/2"±1/8"

Before

Tightening

Band

Remaining Kevlar

Trimmed and

Tucked In This Area

Completed

Band

Termination

1/4"±1/8" After

Tightening Band

Proper Termination

Will Leave Approx 1/4"

Slack In Fiber-optic

Conductors

Kevlar Strength Members

Must Remain Taught

(No Slack)