ADJUSTABLE LOCKING PELLETS FOR
SEELSKREW ? , SEELBOLT ? & SEELNUT ?
SELF-SEALING FASTENERS
FULLY ADJUSTABLE & REUSABLE PER
IFI 124, IFI 524 & MIL-DTL-18240F,
NASM25027
When assembled with a mating part the resilient engineered polymer
pellet (normally Nylon) is compressed, and a locking action is established.
APM Pellet Locking action takes place inside the threads due to its
vibration dampening characteristics, as opposed to at the bearing surface.
The resilience of the pellet holds the fastener in place without adhesives
or thread distortion. The pellet’s resiliency also contributes to its superior
degree of adjustability and repeated reusability. See pages 4, 5 & 6 of
this catalog for complete list of fastener sizes to apply.
Self-Sealing screws, bolts and nuts that have pellets installed can
operate and deliver outstanding performance in both high and low
temperature extremes without degradation. Under most operating conditions, these pellets are unaffected by vibration of
reversal of stress. Installed in a drilled hole (just below the depth of the thread), APM pellets are typically positioned one
to three threads back from the end of the fastener to assure ease of starting. Hole positioning can be modi?ed to meet
speci?c applications – contact Technical Sales for assistance.
FEATURES
? Resistant to vibration and reversal of stress, APM
pellets lock whether fasteners are seated or
unseated.
? Saves money by eliminating the need for costly lock
washers, cotter pins or castellated nuts. You get a
close ?t without expensive close tolerances. APM
pellets are less expensive than applying bottled
thread locking compounds at the point of assembly.
? APM pellets are virtually impervious to a wide range
of chemicals, water and motor ?uids. They won’t dry,
shrink or lose resiliency when exposed to commer-
cial solvents, alcohol, gasoline, oil, caustic soda, and
many other chemicals.
SPECIFICATIONS
HOW TO ORDER
Specify the head type, thread size, length, followed by
the Ordering Code.
Example: To order a slotted pan head SEELSKREW,
with a 8-32 thread, 1 inch long, with
standard silicone o-ring, black oxide ?nish
and Nylon pellet order...
S8-32X1-2701-BLKOX-NY
See inside front cover How To Order information for
additional assistance.
Material
Nylon
Reusability
Up to 15 on/off cycles
Effective Temperature Range
-65°F to +250°F (-54°C to +121°C)
Ordering Code
NY
KEL-F*
0
(one installation and one removal)
-320°F to +390°F (-196°C to +198°C)
NB
Vespel**
Up to 5 on/off cycles
-450°F to +500°F (-268°C to +260°C)
NBR
* KEL-F is a registered trademark of Minnesota Mining and Manufacturing Co.
** Vespel and Te?on are registered trademarks of EI. Dupont De Nemours & Co.
800.498.9034
8
www.apmselfsealingfasteners.com
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