NA / NAL

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Features

  • Internal floating nut feature allows up to .030” (0.76mm) lateral adjustment to compensate for misalignment with mating fastener.
  • Permanent installation in aluminum, 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.


When second sourcing PENCOM’s products, PENCOM recommends that the part is tested in the application to ensure that it will meet all performance requirements.

Dimensions

Thread1 Thread
Code
Sheet A
Shank Length Max.
C
Max.
D
Max.
E
±0.38
T1
Max.
T2
Max.
Minimum Thickness Hole Size
+0.08
-0.00
Minimum
Distance Hole
Center to Edge
M2 x 0.42 M2 0.97 7.37 7.62 0.97 7.35 7.37 9.14 3.31 4.83
1.38 1.38
M2.5 x 0.452 M2.5 0.97 7.37 7.62 0.97 7.35 7.37 9.14 3.31 4.83
1.38 1.38
M3 x 0.5 M3 0.97 7.37 7.62 0.97 7.35 7.37 9.14 3.31 4.83
1.38 1.38
M3.5 x 0.6 M3.5 0.97 8.33 8.13 0.97 8.31 8.51 9.91 3.31 5.10
1.38 1.38
M4 x 0.7 M4 0.97 9.35 8.64 0.97 9.33 9.28 11.18 3.31 5.34
1.38 1.38
M5 x 0.8 M5 0.97 10.31 9.14 0.97 10.29 10.29 11.94 4.32 6.86
1.38 1.38
M6 x 1.0 M6 1.38 13.08 10.67 1.38 13.06 12.96 15.24 5.34 7.88

Material & Finish

Material
Code
Finish
Code
Retainer Nut For use in
Sheet Hardness
Material
Description
Finish
Description
Material
Description
Finish
Description
HRB 70
Max.
HRB 88
Max.
NA Non-Locking
ST Z Heat-treated
Carbon Steel
Zinc (SC1) with Type III Clear Chromate per ASTM B 633 Carbon Steel Zinc (SC1) with Type III Clear Chromate per ASTM B 633
SS P 300-Series
Stainless Steel
Passivate and/or test per ASTM A 967 300-Series
Stainless Steel
Passivate and/or test per ASTM A 967
S41 P 400-Series
Stainless Steel
Passivate and/or test per ASTM A 967 300-Series
Stainless Steel
Passivate and/or test per ASTM A 967
NAL Locking
ST DF Heat-treated
Carbon Steel
Zinc (SC1) with Type III Clear Chromate per ASTM B 633 300-Series
Stainless Steel
Black Dry-film Lubricant
SS DF 300-Series
Stainless Steel
Passivate and/or test per ASTM A 967 300-Series
Stainless Steel
Black Dry-film Lubricant
S41 DF 400-Series
Stainless Steel
Passivate and/or test per ASTM A 967 300-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.
Anvil Dimensions
Thread
Code
M
+0.13
+0.05
N
+0.13
+0.05
M2, M2.5, M3 7.37 9.52
M3.5 8.51 10.29
M4 9.28 11.56
M5 10.29 12.32
M6 12.96 15.62

Performance

Series types NASS, NAST, NALSS and NALST

Thread
Code
Retainer
Shank
Lenght
Sheet Material
2024-T3 Aluminum 5052-H34 Aluminum Cold-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
0.97 13.3 978 7.3 6.7 956 7.3 13.3 1334 9.6
1.38 13.3 1000 16.9 8.9 1000 9.0 13.3 1334 16.9
M3.5 0.97 13.3 1045 12.4 8.9 1067 15.8 13.3 1334 16.9
1.38 13.3 1223 16.9 8.9 1112 16.9 13.3 1334 19.7
M4 0.97 13.3 1067 12.4 8.9 1112 15.8 13.3 1334 16.9
1.38 15.6 1334 16.9 8.9 1178 16.9 13.3 1779 22.6
M5 0.97 15.6 1334 16.9 8.9 1334 16.9 15.6 1779 16.9
1.38 16.6 1334 22.6 8.9 1556 19.7 15.6 2001 22.6
M6 1.38 22.2 1334 36.7 13.3 1779 36.7 22.2 2224 36.7
Thread
Code
Sheet Material
300-Series Stainless Steel
Installation
(kN)
Retainer
Push-out
(N)
Retainer
Torque-out
(N-m)
M2, M2.5, M3 40 890 9.6
M3.5 45 890 9.6
M4 53 890 9.6
M5 57 1100 14.1

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.