Howmet Fastening Systems
Howmet Fastening Systems
Phone: Sales +1 800 992 4444
Technical Support +1 310 784 6409
Email: HFSTechSupport@howmet.com
Website: www.hfs.howmet.com
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THREAD: AS8879
MATERIAL:
  • Nut - 4037 alloy steel per AMS 6300 (UNS G40370) or C1050 carbon steel per AMS 5085 (UNS G10500).
  • Washer - C1050 carbon steel per AMS 5085 (UNS G10500).
FINISH:
  • Nut - Cadmium plate per AMS-QQ-P-416 Type II, Class 2 and Kaylube molybdenum disulfide dry lubricant per AS5272, Type I.
  • Washer - Cadmium plate per AMS-QQ-P-416, Type II, Class 3.
PERFORMANCE: NASM25027 except as follows:
  • Axial tensile strength as tabulated based on 160 KSI.
HW19373 Wrenchable Hex Nut - Captive Washer
Unit of Measure
1 

Item #

A - MAX

B - MIN

H - MAX

P - REF

W

Axial Tensile Strength (LBS. MIN)

Approx. Weight (LBS/100)

Thread

Part Family

HW19373-08 N/A 0.395 N/A 0.335 N/A 0.194 N/A 0.174 N/A 0.189 in0.189-0.181 N/A 2490 N/A 0.160 N/A 0.1640-32 UNJC-3B N/A HW19373
HW19373-3 N/A 0.458 N/A 0.398 N/A 0.224 N/A 0.203 N/A 0.251 in0.251-0.243 N/A 3470 N/A 0.230 N/A 0.1900-32 UNJF-3B N/A HW19373
HW19373-4 N/A 0.520 N/A 0.460 N/A 0.245 N/A 0.265 N/A 0.313 in0.313-0.305 N/A 6200 N/A 0.500 N/A 0.2500-28 UNJF-3B N/A HW19373
HW19373-5 N/A 0.582 N/A 0.522 N/A 0.292 N/A 0.328 N/A 0.376 in0.376-0.367 N/A 9820 N/A 0.750 N/A 0.3125-24 UNJF-3B N/A HW19373
Unit of Measure
1