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  • Nut – A286-Reduced Hex, Thin, Light Weight 450 °F & 800 °F
MATERIAL: Non magnetic, heat and corrosion resistant steel. A 286 per AMS5525, AMS5735 or AMS5737.

FINISH:
  • PLH5xxx : Silver plate AMS2410.
  • PLH5xxxM : Dry film lubricant in accordance with NASM25027.
THREADS: AS8879 before lubrification.

CLASSIFICATION:
  • PLH5xxx: 800 °F.
  • PLH5xxxM: 450° F.
MARKING:
  • PLH5xxx: SD + C + N. No identification is required on.1640 size and smaller.
  • PLH5xxxM: SD + C. No identification is required on.1900 size and smaller.
PROCUREMENT SPECIFICATION: NASM25027 except tensile strength.

BEARING SURFACE: Shall be square with pitch diameter within X when measured in accordance with NASM25027.

Contact Howmet for the diameter/type in manufacturing
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A - MAX

B - MIN

C - MIN

D - MAX

D - MIN

H - MAX

H - MIN

Thread

PLH 502 N/A 0.167 Inch N/A 0.137 Inch N/A 0.138 Inch N/A 0.106 Inch N/A 0.086 Inch N/A 0.100 Inch N/A 0.080 Inch N/A 0.0860-56 UNJC-3B
PLH 504 N/A 0.206 Inch N/A 0.176 Inch N/A 0.171 Inch N/A 0.142 Inch N/A 0.112 Inch N/A 0.125 Inch N/A 0.103 Inch N/A 0.1120-40 UNJC-3B
PLH 506 N/A 0.244 Inch N/A 0.214 Inch N/A 0.207 Inch N/A 0.168 Inch N/A 0.138 Inch N/A 0.141 Inch N/A 0.115 Inch N/A 0.1380-32 UNJC-3B
PLH 508 N/A 0.290 Inch N/A 0.260 Inch N/A 0.244 Inch N/A 0.194 Inch N/A 0.164 Inch N/A 0.188 Inch N/A 0.125 Inch N/A 0.1640-32 UNJC-3B
PLH 53 N/A 0.330 Inch N/A 0.290 Inch N/A 0.277 Inch N/A 0.220 Inch N/A 0.190 Inch N/A 0.188 Inch N/A 0.154 Inch N/A 0.1900-32 UNJF-3B
PLH 54 N/A 0.420 Inch N/A 0.386 Inch N/A 0.347 Inch N/A 0.280 Inch N/A 0.250 Inch N/A 0.219 Inch N/A 0.204 Inch N/A 0.2500-28 UNJF-3B
PHL 55 N/A 0.520 Inch N/A 0.482 Inch N/A 0.419 Inch N/A 0.342 Inch N/A 0.312 Inch N/A 0.266 Inch N/A 0.251 Inch N/A 0.3125-24 UNJF-3B
PLH 56 N/A 0.620 Inch N/A 0.575 Inch N/A 0.491 Inch N/A 0.405 Inch N/A 0.375 Inch N/A 0.282 Inch N/A 0.267 Inch N/A 0.3750-24 UNJF-3B
PLH 57 N/A 0.708 Inch N/A 0.680 Inch N/A 0.562 Inch N/A 0.467 Inch N/A 0.437 Inch N/A 0.328 Inch N/A 0.313 Inch N/A 0.4375-20 UNJF-3B
PLH 58 N/A 0.814 Inch N/A 0.786 Inch N/A 0.633 Inch N/A 0.530 Inch N/A 0.500 Inch N/A 0.410 Inch N/A 0.350 Inch N/A 0.5000-20 UNJF-3B
PLH 59 N/A 0.912 Inch N/A 0.874 Inch N/A 0.775 Inch N/A 0.592 Inch N/A 0.562 Inch N/A 0.480 Inch N/A 0.420 Inch N/A 0.5625-18 UNJF-3B
PLH 510 N/A 1.014 Inch N/A 0.976 Inch N/A 0.846 Inch N/A 0.655 Inch N/A 0.625 Inch N/A 0.550 Inch N/A 0.490 Inch N/A 0.6250-18 UNJF-3B
PLH 502M N/A 0.167 Inch N/A 0.137 Inch N/A 0.138 Inch N/A 0.106 Inch N/A 0.086 Inch N/A 0.100 Inch N/A 0.080 Inch N/A 0.0860-56 UNJC-3B
PLH 504M N/A 0.206 Inch N/A 0.176 Inch N/A 0.171 Inch N/A 0.142 Inch N/A 0.112 Inch N/A 0.125 Inch N/A 0.103 Inch N/A 0.1120-40 UNJC-3B
PLH 506M N/A 0.244 Inch N/A 0.214 Inch N/A 0.207 Inch N/A 0.168 Inch N/A 0.138 Inch N/A 0.141 Inch N/A 0.115 Inch N/A 0.1380-32 UNJC-3B
PLH 508M N/A 0.290 Inch N/A 0.260 Inch N/A 0.244 Inch N/A 0.194 Inch N/A 0.164 Inch N/A 0.188 Inch N/A 0.125 Inch N/A 0.1640-32 UNJC-3B
PLH 53M N/A 0.330 Inch N/A 0.290 Inch N/A 0.277 Inch N/A 0.220 Inch N/A 0.190 Inch N/A 0.188 Inch N/A 0.154 Inch N/A 0.1900-32 UNJF-3B
PLH 54M N/A 0.420 Inch N/A 0.386 Inch N/A 0.347 Inch N/A 0.280 Inch N/A 0.250 Inch N/A 0.219 Inch N/A 0.204 Inch N/A 0.2500-28 UNJF-3B
PHL 55M N/A 0.520 Inch N/A 0.482 Inch N/A 0.419 Inch N/A 0.342 Inch N/A 0.312 Inch N/A 0.266 Inch N/A 0.251 Inch N/A 0.3125-24 UNJF-3B
PLH 56M N/A 0.620 Inch N/A 0.575 Inch N/A 0.491 Inch N/A 0.405 Inch N/A 0.375 Inch N/A 0.282 Inch N/A 0.267 Inch N/A 0.3750-24 UNJF-3B
PLH 57M N/A 0.708 Inch N/A 0.680 Inch N/A 0.562 Inch N/A 0.467 Inch N/A 0.437 Inch N/A 0.328 Inch N/A 0.313 Inch N/A 0.4375-20 UNJF-3B
PLH 58M N/A 0.814 Inch N/A 0.786 Inch N/A 0.633 Inch N/A 0.530 Inch N/A 0.500 Inch N/A 0.410 Inch N/A 0.350 Inch N/A 0.5000-20 UNJF-3B
PLH 59M N/A 0.912 Inch N/A 0.874 Inch N/A 0.775 Inch N/A 0.592 Inch N/A 0.562 Inch N/A 0.480 Inch N/A 0.420 Inch N/A 0.5625-18 UNJF-3B
PLH 510M N/A 1.014 Inch N/A 0.976 Inch N/A 0.846 Inch N/A 0.655 Inch N/A 0.625 Inch N/A 0.550 Inch N/A 0.490 Inch N/A 0.6250-18 UNJF-3B
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