3D CAD Models available. Contact a PENCOM Account Representative to request.

Part Description Example

  • NASeries
  • SSMaterial
  • 440Thread
    Code
  • .060Shank
  • ZFinish
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*Contact a PENCOM Account Representative for the part number based on the description.

Features

  • Internal floating nut feature allows up to .030” (0.76mm) lateral adjustment to compensate for misalignment with mating fastener.
  • Permanent installationinaluminum,carbon steel and stainless steel sheets.
  • Self-locking version provides uniformity of locking torque equivalent to NASM25027 specifications. See the Pencom website technical reference Locking Fastener Conformance to NASM25027 for complete information.
  • Choice ofRoHS–compliant materials and finishes.
nal-features
nal-example
Thread1Thread
Code
SheetA
Shank Length Max.
C
Max.
D
Max.
E
±.015
T1 Max.T2 Max.
Minimum ThicknessHole Size
+.003
-.000
Minimum
Distance Hole
Center to Edge
2-562256.038.290.30.038.289.290.360.130.190
.054.054
4-40440.038.290.30.038.289.290.360.130.190
.054.054
6-32632.038.328.32.038.327.335.390.130.200
.054.054
8-32832.038.368.34.038.367.365.440.130.210
.054.054
10-241024.038.406.36.038.405.405.470.170.270
.054.054
10-321032.038.406.36.038.405.405.470.170.270
.054.054
1/4-202520.054.515.42.054.514.510.600.210.310
1/4-282528.054.515.42.054.514.510.600.210.310
(1) NA and NAL-series internal threads comply with ANSI B1.1 2B and 3B thread specifications, respectively.
(2) NAL not available with 2-56 threads.
Thread1Thread
Code
SheetA
Shank Length Max.
C
Max.
D
Max.
E
±0.38
T1
Max.
T2
Max.
Minimum ThicknessHole Size
+0.08
-0.00
Minimum
Distance Hole
Center to Edge
M2 x 0.42M20.977.377.620.977.357.379.143.314.83
1.381.38
M2.5 x 0.452M2.50.977.377.620.977.357.379.143.314.83
1.381.38
M3 x 0.5M30.977.377.620.977.357.379.143.314.83
1.381.38
M3.5 x 0.6M3.50.978.338.130.978.318.519.913.315.10
1.381.38
M4 x 0.7M40.979.358.640.979.339.2811.183.315.34
1.381.38
M5 x 0.8M50.9710.319.140.9710.2910.2911.944.326.86
1.381.38
M6 x 1.0M61.3813.0810.671.3813.0612.9615.245.347.88
(1) NA and NAL-series internal threads comply with ASME B1.13M,6H thread specifications.
(2) NAL not available with M2 or M2.5 threads.
Material
Code
Finish
Code
RetainerNutFor use in
Sheet Hardness
Material
Description
Finish
Description
Material
Description
Finish
Description
HRB 70
Max.
HRB 88
Max.
NA Non-Locking
STZHeat-treated
Carbon Steel
Zinc (SC1) with Type III Clear Chromate per ASTM B 633Carbon SteelZinc (SC1) with Type III Clear Chromate per ASTM B 633
SSP300-Series
Stainless Steel
Passivate and/or test per ASTM A 967300-Series
Stainless Steel
Passivate and/or test per ASTM A 967
S41P400-Series
Stainless Steel
Passivate and/or test per ASTM A 967300-Series
Stainless Steel
Passivate and/or test per ASTM A 967
NAL Locking
STDFHeat-treated
Carbon Steel
Zinc (SC1) with Type III Clear Chromate per ASTM B 633300-Series
Stainless Steel
Black Dry-film Lubricant
SSDF300-Series
Stainless Steel
Passivate and/or test per ASTM A 967300-Series
Stainless Steel
Black Dry-film Lubricant
S41DF400-Series
Stainless Steel
Passivate and/or test per ASTM A 967300-Series
Stainless Steel
Black Dry-film Lubricant
(1) Not available in 2-56, 4-40, 6-32, 8-32, 10-24 and 10-32 thread sizes with .054” shank length; M2, M2.5, M3, M4 and M5 thread sizes with 1.38mm shank length; and 1/4-20, 1/4-28 and M6 thread sizes.

Installation

  1. Punch or drill hole in sheet. Do not deburr edges.
  2. Insert fastener in recessed anvil and locate sheet hole over the retainer shank.
  3. Squeeze the fastener and sheet between parallel punch and anvil surfaces. Use only enough pressure to seat the retainer shoulder flush with the sheet. Punch and anvil should be made from hardened steel.

nal-install

Anvil Dimensions

Thread
Code
M
+.005
+.002
N
+.005
+.002
256, 440.290.375
632.335.405
832.365.455
1024, 1032.405.485
2520, 2528.510.615
Thread
Code
M
+0.13
+0.05
N
+0.13
+0.05
M2, M2.5, M37.379.52
M3.58.5110.29
M49.2811.56
M510.2912.32
M612.9615.62

Performance1

Series types NASS, NAST, NALSS and NALST

Inch

Thread
Code
Retainer
Shank
Length
Sheet material
2024-T3 Aluminum5052-H34 AluminumCold-Rolled Steel
Installation
(lbs)
Retainer
Push-out
(lbs)
Retainer
Torque-out
(in-lbs)
Installation
(lbs)
Retainer
Push-out
(lbs)
Retainer
Torque-out
(in-lbs)
Installation
(lbs)
Retainer
Push-out
(lbs)
Retainer
Torque-out
(in-lbs)
256
440
.038300022065150021565300030085
.054225150200022580150
632.038300023511020002401403000300150
.054275150250150175
832.038300024011020002501403000300150
.054300150265150400200
1024
1032
.038350030015020003001503500400150
.054200350175450200
2520
2528
.054500030032530004003255000500325

Metric

Series types NASS, NAST, NALSS and NALST

Thread
Code
Retainer
Shank
Lenght
Sheet Material
2024-T3 Aluminum5052-H34 AluminumCold-Rolled Steel
installation
(kN)
retainer Push-out (N)retainer torque-out (N-m)installation
(kN)
retainer Push-out (N)retainer torque-out (N-m)installation
(kN)
retainer Push-out (N)retainer torque-out (N-m)
M2, M2.5
M3
0.9713.39787.36.79567.313.313349.6
1.3813.3100016.98.910009.013.3133416.9
M3.50.9713.3104512.48.9106715.813.3133416.9
1.3813.3122316.98.9111216.913.3133419.7
M40.9713.3106712.48.9111215.813.3133416.9
1.3815.6133416.98.9117816.913.3177922.6
M50.9715.6133416.98.9133416.915.6177916.9
1.3816.6133422.68.9155619.715.6200122.6
M61.3822.2133436.713.3177936.722.2222436.7

Thread
Code
Sheet Material
300-Series Stainless Steel
Installation
(lbs)
Retainer
Push-out
(lbs)
Retainer
Torque-out
(in-lbs)
256, 440900020085
6321000020085
8321200020085
1024, 103213000250125
(1) Performance data represents reference averages based on commonly reported industry values when all installation specifications and procedures are followed. Variations such as sheet material type, hardness and thickness; hole diameter; method of hole manufacture; size and location of hole burr if any; and amount of installation load will affect the data. PENCOM highly recommends testing in each application to determine actual loads.
Thread
Code
Sheet Material
300-Series Stainless Steel
Installation
(kN)
Retainer
Push-out
(N)
Retainer
Torque-out
(N-m)
M2, M2.5, M3408909.6
M3.5458909.6
M4538909.6
M557110014.1
(1) Performance data represents reference averages based on commonly reported industry values when all installation specifications and procedures are followed. Variations such as sheet material type, hardness and thickness; hole diameter; method of hole manufacture; size and location of hole burr if any; and amount of installation load will affect the data. PENCOM highly recommends testing in each application to determine actual loads.