Delron Inserts 400 HF Series – Floating Nut
Style Selection
All styles feature a .031 inch minimum radial float.
Table 1
| Size | Thread Size Per MIL-S-8879 | A Head Dia. | B Flange Dia. | C Hole Dia. |
| 440 | .1120-40 UNJC-3B | .499 | .489 | .323 |
| 632 | .1380-32 UNJC-3B | .499 | .489 | .323 |
| 832 | .1640-32 UNJC-3B | .561 | .551 | .323 |
| 1032 | .1900-32 UNJF-3B | .561 | .551 | .323 |
| 428 | .2500-28 UNJF-3B | .686 | .676 | .437 |
| 524 | .3125-24 UNJF-3B | .811 | .801 | .437 |
| 624 | .3750-24 UNJF-3B | .936 | .926 | .515 |
Part Number Selection
Consult Rosán for availability of optional materials, finishes and sizes.
Example:
Materials and Finishes:
Body: 2024-T4 or T351 Aluminum Alloy per QQ-A-225/6; Alodine per MIL-C-5541.
Cap: Brass, Cadmium plated, or Aluminum, Anodized at manufacturer’s option.
T-Nut: Options listed in Part Number Selection.
Notes:
- Burrs permissible at 0knurled areas and underside of head around potting
- Adhesive backed installation tabs are furnished with each slotted part. See Table
- Tolerances, unless otherwise specified: .xxx ± .010; Angles ± 2°.
Typical Assembly
Typical Series 400 HF, Floating Nut Insert; installed in honeycomb sandwich panel. Insert is held in place by a cured
epoxy compound.
Note: For installation and tooling information, see pages 44 and 45.
Length Dash Number Selection
Select Length Dash Number from Table 2 based on the minimum full thread length required by the application. Insert
length “L” must be a minimum of .040″ less than depth of panel core (See Fig. 1).
Examples:
1. Requirements: 428 Size Normal Thread, Carbon Steel Nut, MoS2 Lubricant, with a Minimum Full Thread Length of .400,
and an overall panel thickness of .520. From table select:-08 P/N = 493HF 428M08
2. Requirements: 1032 Size Crimp Lock Thread, CRES STeel Nut, No Slots, a Minimum Full Thread Length of .380, and an
overall panel thickness of .880. From table select: -14 P/N = 465HF 1032-14NS
Fig. 1
Minimum clearance is required between bottom of insert and inside panel skin for proper epoxy bonding around bottom of
insert.
Table 2
| Length Dash Number | L | Thread Size | ||||||
| 440 | 632 | 832 | 1032 | 428 | 524 | 624 | ||
| -06 | .335 | .224 | .276 | .292 | .292 | — | — | — |
| -07 | .395 | .224 | .276 | .328 | .350 | .350 | .350 | .350 |
| -08 | .455 | .224 | .276 | .328 | .380 | .410 | .410 | .410 |
| -10 | .565 | .224 | .276 | .328 | .380 | .500 | .520 | .520 |
| -12 | .690 | .224 | .276 | .328 | .380 | .500 | .625 | .645 |
| -14 | .815 | .224 | .276 | .328 | .380 | .500 | .625 | .750 |
| -16 | .935 | .224 | .276 | .328 | .380 | .500 | .625 | .750 |
Installation Tabs
Adhesive backed installation tabs are supplied with all 400 HF Series Inserts, unless otherwise specified. The tabs are
coded by insert thread size as listed in Table 3.
Table 3
| Thread Size | Installation Tab Number |
| 440 | T13 |
| 632 | T13 |
| 832 | T6 |
| 1032 | T6 |
| 428 | T9 |
| 524 | T11 |
| 624 | T27 |
