PATCH FOR LOCKING & SEALING –
PRE- APPLIED TO SEELSKREW ? & SEELBOLT ?
SELF-SEALING FASTENERS
VIBRATION-DAMPENING ACTION ON
THE THREAD SURFACE is achieved
while still allowing repeated
adjustment & reuse.
The APM Patch dry coating process is fused to the thread surface
and delivered ready to be installed without the need for curing or any
other special preparation. When assembled with a mating part the
resilient engineered polymer (normally Nylon) Patch is compressed
providing a locking action in the thread instead of at the bearing
surface due to its vibration dampening characteristics. The resilience
of the APM Patch holds the fastener in place without adhesives or
thread distortion. Generally the Patch coating is applied 120° to 4-6
threads, starting 1-3 threads back form the end. Modi?ed Patch
location and coating length can be speci?ed for speci?c applications.
FEATURES
? Patch provides excellent locking performance as well
as increased sealing ability by completely ?lling the
thread root with an elastic nylon dam.
? APM Patch process involves no drilling or milling,
so there is no loss of the fastener’s strength or
hardness and no troublesome burrs or chips.
? Saves money by eliminating the need for costly
lock washers, cotter pins, or castellated nuts. You
get a close ?t without the costs involved in obtaining
close tolerances. And, applying the Patch is less
expensive than applying bottled threadlocking
compounds at the point of assembly.
? Resists heat and cold, and meets or exceeds
IFI Speci?cations 124 & 524, as well as Military
Speci?cation MIL-DTL-18240F, Type P, for
temperatures up to +250°F (up to +121°C).
? APM Patch will not dry, shrink, or lose resiliency
when exposed to commercial solvents, alcohol,
gasoline, oil, caustic soda, jet fuel, etc.
? The addition of the Patch greatly reduces the need
for retightening. It can be reused repeatedly without
damage to threads, and is particularly resistant to
deformation.
800.498.9034
SPECIFICATIONS
Primary Useage: Lock and Seal
Reusability: Up to 15 on-off cycles
Material: Nylon 11
Color: Yellow (other colors available upon request*)
Hardness: Shore D (ASTM D2240) 70-80 Durometer
Salt Spray Resistance: (ASTM B117) 1000+ hours (X
scribe)
Taber Abrasion: (ASTM D4060) 10-18 mg loss CS-10
wheel, 1000 g load, 1000 cycles (varies with color)
Dielectric Strength: (ASTM D149) 800-1200 volts/mil
@10.0 mils (varies with color)
Direct Impact resistance: (MPTM 0002) 160 in. lbs.
(@10.0 mils)
Shelf Life: The on part shelf life is at least one year
under ideal storage conditions (+4°C to +32°C, or
+40°F to +90°F).
*QPL-18240 & MIL-DTL-18240F require yellow Nylon
HOW TO ORDER
Ordering Code: TP
Example: To order a slotted pan head SEELCKREW,
with a 8-32 thread, 1 inch long, with a
silicone o-ring, black oxide ?nish, and with a
Nylon patch order...
S8-32X1-2701-BLKOX-TP
See inside front cover How To Order information for
additional assistance.
www.apmselfsealingfasteners.com
10
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