Howmet Fastening Systems
Howmet Fastening Systems
Phone: Sales +1 800 992 4444
Technical Support +1 310 784 6409
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Website: www.hfs.howmet.com
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MATERIAL: Non magnetic, heat and corrosion resistant steel ( A286.) per AMS-5525, 5735 or 5737

FINISH : Dry film lubricant.

PERFORMANCE : Torque per NASM 25027.

THREADS: In accordance with AS-8879 before lubrication.

MARKING: Only ø - 3 and - 4 : SD + letter C on the area indicated on the drawing.

APPLICATION : Type DA, DB and DC parts are particularly suited for use in applications involving installations in thin Aluminum or soft steel sheets or plates having small mounting areas making the use of a miniature fixed type nut desireable. The adaptability of two shaft lengths to many sheet thicknesses is worth of note since it minimizes nut stocking requirements for numerous applications.

MOUNTING RECOMMENDATIONS
  • Respect carefully the installation hole diameter tolerance.
  • The nut and installation hole diameter axis must be perpendicular to the sheet surface.
Nut- Clinch Flush Mounting , Miniature , 450°F
Unit of Measure
1 

Item #

A ±0,10

C ±.002

D - MAX

D - MIN

F ±.003

G - REF

H - MAX

M - REF

Thread

DA 502M N/A 0.156 Inch N/A 0.129 Inch N/A 0.101 Inch N/A 0.096 Inch N/A 0.040 Inch N/A 0.109 Inch N/A 0.095 Inch N/A 0.040 Inch N/A 0.0860-56 UNJC-3B
DB 502M N/A 0.156 Inch N/A 0.129 Inch N/A 0.101 Inch N/A 0.096 Inch N/A 0.060 Inch N/A 0.109 Inch N/A 0.095 Inch N/A 0.060 Inch N/A 0.0860-56 UNJC-3B
DC 502M N/A 0.156 Inch N/A 0.129 Inch N/A 0.101 Inch N/A 0.096 Inch N/A 0.090 Inch N/A 0.109 Inch N/A 0.095 Inch N/A 0.090 Inch N/A 0.0860-56 UNJC-3B
DA 504M N/A 0.203 Inch N/A 0.160 Inch N/A 0.133 Inch N/A 0.128 Inch N/A 0.040 Inch N/A 0.143 Inch N/A 0.122 Inch N/A 0.040 Inch N/A 0.1120-40 UNJC-3B
DB 504M N/A 0.203 Inch N/A 0.160 Inch N/A 0.133 Inch N/A 0.128 Inch N/A 0.060 Inch N/A 0.143 Inch N/A 0.122 Inch N/A 0.060 Inch N/A 0.1120-40 UNJC-3B
DC 504M N/A 0.203 Inch N/A 0.160 Inch N/A 0.133 Inch N/A 0.128 Inch N/A 0.090 Inch N/A 0.143 Inch N/A 0.122 Inch N/A 0.090 Inch N/A 0.1120-40 UNJC-3B
DA 506M N/A 0.234 Inch N/A 0.192 Inch N/A 0.157 Inch N/A 0.152 Inch N/A 0.040 Inch N/A 0.173 Inch N/A 0.130 Inch N/A 0.040 Inch N/A 0.1380-32 UNJC-3B
DB 506M N/A 0.234 Inch N/A 0.192 Inch N/A 0.157 Inch N/A 0.152 Inch N/A 0.060 Inch N/A 0.173 Inch N/A 0.130 Inch N/A 0.060 Inch N/A 0.1380-32 UNJC-3B
DC 506M N/A 0.234 Inch N/A 0.192 Inch N/A 0.157 Inch N/A 0.152 Inch N/A 0.090 Inch N/A 0.173 Inch N/A 0.130 Inch N/A 0.090 Inch N/A 0.1380-32 UNJC-3B
DA 508M N/A 0.281 Inch N/A 0.223 Inch N/A 0.183 Inch N/A 0.178 Inch N/A 0.040 Inch N/A 0.198 Inch N/A 0.130 Inch N/A 0.040 Inch N/A 0.1640-32 UNJC-3B
DB 508M N/A 0.281 Inch N/A 0.223 Inch N/A 0.183 Inch N/A 0.178 Inch N/A 0.060 Inch N/A 0.198 Inch N/A 0.130 Inch N/A 0.060 Inch N/A 0.1640-32 UNJC-3B
DC 508M N/A 0.281 Inch N/A 0.223 Inch N/A 0.183 Inch N/A 0.178 Inch N/A 0.090 Inch N/A 0.198 Inch N/A 0.130 Inch N/A 0.090 Inch N/A 0.1640-32 UNJC-3B
DA 53M N/A 0.328 Inch N/A 0.254 Inch N/A 0.215 Inch N/A 0.210 Inch N/A 0.040 Inch N/A 0.222 Inch N/A 0.130 Inch N/A 0.040 Inch N/A 0.1900-32 UNJF-3B
DB 53M N/A 0.328 Inch N/A 0.254 Inch N/A 0.215 Inch N/A 0.210 Inch N/A 0.060 Inch N/A 0.222 Inch N/A 0.130 Inch N/A 0.060 Inch N/A 0.1900-32 UNJF-3B
DC 53M N/A 0.328 Inch N/A 0.254 Inch N/A 0.215 Inch N/A 0.210 Inch N/A 0.090 Inch N/A 0.222 Inch N/A 0.130 Inch N/A 0.090 Inch N/A 0.1900-32 UNJF-3B
DA 54M N/A 0.391 Inch N/A 0.316 Inch N/A 0.260 Inch N/A 0.255 Inch N/A 0.040 Inch N/A 0.297 Inch N/A 0.224 Inch N/A 0.040 Inch N/A 0.2500-28 UNJF-3B
DB 54M N/A 0.391 Inch N/A 0.316 Inch N/A 0.260 Inch N/A 0.255 Inch N/A 0.060 Inch N/A 0.297 Inch N/A 0.224 Inch N/A 0.060 Inch N/A 0.2500-28 UNJF-3B
DC 54M N/A 0.391 Inch N/A 0.316 Inch N/A 0.260 Inch N/A 0.255 Inch N/A 0.090 Inch N/A 0.297 Inch N/A 0.224 Inch N/A 0.090 Inch N/A 0.2500-28 UNJF-3B
Unit of Measure
1