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606 Series Threaded

Delron Inserts 606 Series Threaded with Self-Locking Helical Coil Insert

Style Selection

Table 1

Size Thread Per MIL-S-8879 A Head Dia. B Sleeve Dia. C Dia.
1 .1380-32 UNJC-3B .500 .312 .24
2 .1640-32 UNJC-3B .562 .375 .27
3 .1900-32 UNJF-3B .625 .437 .33
4 .2500-28 UNJF-3B .687 .500 .40
5 .3125-24 UNJF-3B .750 .562 .46
6 .3750-24 UNJF-3B .875 .625 .49

Part Number Selection
Consult Rosán for availability of optional materials, finishes and sizes.

Example:

Note:

  1. Tolerances, unless otherwise specified: .xxx ± .010; Angles ± 2°.

Typical Assembly

Typical Series 606, Threaded with Self-Locking Helical Coil Insert; Body and Sleeve assembly installed in honeycomb
sandwich panel. Panel skin is gripped between body and flared sleeve of insert for outstanding structural strength.

Note: For installation and
tooling information, see pages 56 and 57.

Body and Sleeve Dash Number Selection

Sleeve Dash Number
Round down to the nearest hundredth of an inch of the panel core thickness (See Figs. 1).

Example: .489 Core Thickness, drop last digit to read -48.

D – Flush Head F – Non-Flush Head
Note: For inspection, the actual sleeve length will be .010 to .015 shorter than the dash number
called out.

Example: -48 = .480, Actual

Length = .465 to .470.

Note: For inspection, the actual sleeve length will be .020 longer than the dash number called
out.

Example: -48 = .480, Actual

Length = .500.

Body Dash Number

  1. Determine the Maximum Body Length (See Figs. 2) using the appropriate formula, below, based on Head Style.
D – Flush Head F – Non-Flush Head
Overall Panel Thickness minus Bottom Skin Thickness minus .010 Springback Factor.

Example: .750 – Overall Panel Thickness – .020 /.730 – Bottom Skin Thickness – .010/.720 
Springback Factor = – Maximum Body Length

Core Thickness plus Top Skin Thickness minus .010 Springback Factor.

Example: .690 – Core Thickness +.040/.730 – Top Skin Thickness – .010/.720 
Springback Factor = – Maximum Body Length

2. Select Body Dash Number from the table below based on Maximum Body Length determined in Step 1; round down to next
lowest value.

Example: .720 Maximum Body Length = -70 Body Dash Number.

Body Dash Number Maximum Body Length Thread Size
1 2 3 4 5 6
D HEAD F HEAD D HEAD F HEAD
-30 .335 N.A. N.A.
-40 .350
-50 .450 .276 .246 .285 .250
-60 .550 .276 .328 .380 .250 .312 .312
-70 .650 .276 .328 .380 .500 .312 .312 .375
-80 .750 .276 .328 .380 .500 .468 .468 .375 .375
-90 .850 .276 .328 .380 .500 .468 .625 .562 .562
-100 .950 .276 .328 .380 .500 .625 .625 .562 .750
-110 1.050 .276 .328 .380 .500 .625 .625 .750 .750
-120 1.150 .276 .328 .380 .500 .625 .625 .750 .750
-130 1.250 .276 .328 .380 .500 .625 .625 .750 .750
-140 1.350 .276 .328 .380 .500 .625 .625 .750 .750
-150 1.450 .276 .328 .380 .500 .625 .625 .750 .750

Fig. 1

Fig. 2

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