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SJ3252

P1-P3P4-P6P7-P9P10-P10
3M
™
Dual Lock
™
Reclosable Fasteners for Transportation Industry
Selection Guide
- 4 -
General Physical
Properties
Material Polyolefin
(3M™ Dual Lock™ Pressure-Sensitive Reclosable Fasteners
utilize polyolefin liner.)
Color Black or Clear
Environmental Excellent moisture resistance.
Stability Recommended temperature range:
-20°F to 220°F (-12°C to 104°C).
Shelf Life Product should be used within 2 years from date of manufacture
when stored in original package at 72°F (22°C) and 50% R.H.
Flammability Dual Lock reclosable fasteners should be tested as a composite with
the component it is attached to for FMVSS 302 certification.
Also see the Flame Resistant Products data page (70-0707-3992-8).
Thickness
Because of the wide variety of backing options it is suggested you consult specific data page
for products that may be of interest to your application.
Engaged Thickness
in. (mm)
Engaged Plain Pressure- Rigid Pop-In***
to Back Sensitive* Back**
Plain Back 0.15 0.19 0.24 0.23
(3.81) (4.82) (6.09) (5.84)
Pressure 0.22 0.27 0.27
Sensitive* (5.59) (6.86) (6.86)
Rigid Back** 0.35 0.35
(8.89) (8.89
Pop-In 0.35
Stem*** (8.89)
Tolerance on Engaged Thicknesses is ± 20%.
*Using 0.143 in. (3.63 mm) thick material, does not include the liner
**Using 0.190 in. (4.83 mm) thick material
***Does not include pop-in stem
3M
™
Dual Lock
™
Reclosable Fasteners for Transportation Industry
Selection Guide
Performance
Properties
Typical system performance properties of 3M™ Dual Lock™ Reclosable Fasteners at 72°F ± 5°F
(22°C ± 3°C) and 50% ± 10% R.H. attached to aluminum panels.
Note: Attachment method or use of other fasteners may affect system dynamic performance
listed below.
- 5 -
Test Test Condition Dual Lock Dual Lock
170/250 250/400
SJ3752/SJ3781 SJ3781/SJ3751
Static Tensile 1,000 g @ 120°F 10,000 mins. 10,000 mins.
@ 158°F 10,000 mins. 10,000 mins.
@ 200°F 10,000 mins. 10,000 mins.
@ 220°F 10,000 mins. 10,000 mins.
Static Shear 1,000 g @ 120°F 10,000 mins. 10,000 mins.
@ 158°F 10,000 mins. 10,000 mins.
@ 200°F 10,000 mins. 10,000 mins.
@ 220°F 10,000 mins. 10,000 mins.
System Dynamic Tests Dual Lock Reclosable Fasteners
SJ3752 SJ3781 SJ3752 SJ3781 SJ3781
to to to to to
SJ3781 SJ3781 SJ3751 SJ3751 SJ3571
170 to 250 250 to 250* 170 to 400 250 to 400 250 to Loop
Initial Engagement
lbs
F
/sq in 19 29 29 40 < 1
(131) (200) (200) (276) (< 6.9)
Initial Disengagement
lbs
F
/sq in
2
22 44 50 57 37
(152) (303) (346) (393) (255)
*Widths less than 3/4" should not be self mated for type 250. If widths less than 3/4" are desired a
170 to 400 combination is suggested.
Temperature Variation Chart
All Dual Lock reclosable fastener combinations will support static tensile or shear loads up to
2.2 lbs/sq in (1.0 kg/6.45 cm
2
) across a temperature range of -20°F to 220°F (-12°C to 104°C).
Different attachment methods may change performance.
Specifications
Conformance
Conformance to the following automotive specifications is certified on an annual basis:
General Motors: GM 2743M, GM 3618M
Ford: WSB M15P35 A
Chrysler: PF 8543
PF 8858
(k Newton)
m
2
(
)
(k Newton)
m
2
(
)
3M
™
Dual Lock
™
Reclosable Fasteners for Transportation Industry
Selection Guide
- 6 -
Rigid Backed Products – Color-Black
Product # Selection Guide Description Size Stem Density
SJ3227 Slide-In rectangle Black, 16mm x 25.4mm x 5.08mm (Thick). 250
SJ3228 Slide-In square Black, 20mm x 20mm x 5.08mm (Thick). 400
SJ3229 Slide-In square Black, 25.4mm x 25.4mm x 5.08mm (Thick). 250
SJ3231 Rigid backed rectangle with one hole Black, 20mm x 30mm x 6.35mm (Thick), 400
with one 3.2mm hole and a 7.54mm CB.
SJ3232 Rigid backed rectangle with one hole Black, 20mm x 30mm x 5.08mm (Thick), with 400
one C Bored 3.2mm hole and a 7.54mm CB.
SJ3234 Rigid backed circle with one hole Black, 9/16" (14.3mm) diameter washer, with 400
one 9.2mm diameter C Bore, on a 4.1mm hole.
5.1mm tall.
SJ3235 Rigid backed circle with one hole Black, 20.6mm (13/16") diameter circle. 5.1mm 400
(Thick), with one 9.0mm diameter C Bore, on
a 4.1mm hole.
SJ3236 Rigid backed circle with no hole Black, 28.5mm diameter and 5.08mm (Thick), 400
with no hole.
SJ3237 Slide-In rectangle no holes Black, 32mm x 50mm x 4.7mm (Thick). 400
SJ3238 Rigid backed circle no holes Black, 28.6mm diameter, 5.96mm (Thick). 250
SJ3251 Rigid backed circle with one hole Black, 28.5mm (1
1
/8") diameter circle. 5.96mm 250
thick with one 4.93mm diameter hole and
a 9.53mm diameter centered counterbore.
SJ3252 Rigid backed square with 2 holes
Black, (38.1mm x 38.1mm) with 2 counterbored
400
8.33mm (0.327") x 4.22mm (0.166") holes.
SJ3261 Rigid backed square with 2 holes Black, Rigid Backed Type 400 Square, 1.5" x 400
1.5" x 0.200", with two C Bored, 3.6mm holes,
25mm apart.
SJ3263 Rigid backed circle with one hole Black, 13/16" (20.6mm) round, 5.1mm (Thick), 250
with one 7.9mm C Bore on a 4.1mm hole.
SJ3463 Rigid backed circle with one hole Same as SJ3763. 400
SJ3465 Rigid backed circle one hole Black, 14.29mm (9/16") diameter circle. 5.1mm 400
(Thick), with one 4.1mm diameter hole and
a 7.9mm diameter centered counterbore.
SJ3481 Rigid backed strips Black, Rigid Backed Type 400 DL 400
• 1" x 48", 40 pcs/box
• 2" x 48", 20 pcs/box
SJ3712 Rigid backed circle with one hole Black, 28.5mm (1
1
/8") diameter circle. 5.1mm 170
(Thick) with one 4.1mm diameter hole and
a 7.9mm diameter centered counterbore.
SJ3717 Slide-In rectangle no holes Black, 1" (L) x 1.22" (W) x 5.1mm (Thick). 400
P1-P3P4-P6P7-P9P10-P10

SJ3252

Mfr. #:
Buy SJ3252
Manufacturer:
3M
Description:
DUAL LOCK FASTENER 38.1MM SQ
Lifecycle:
New from this manufacturer.
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