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: A286 corrosion resistant steel, heat treated.
FINISH: Silver plated per AMS2410.
PROCUREMENT SPEC: NASM25027.
TEMPERATURE: 900°F.
APPLICATION: For use with materials such as aluminium alloys, brass and copper.
INSTALLATION DATA: Use Kaylock tool number KT7201 or KT7203.
K7200 Stake Nut
Unit of Measure
1 

Item #

A - MAX

B - MAX

C - MIN

H - MAX

J - MIN

N - REF

T - REF

W - MAX

Recommended Installation Hole Dia.
+.004
-.001

Approx. Weight (LBS/100)

Thread

K7231-04 N/A 0.035 N/A 0.200 N/A 0.112 N/A 0.124 N/A 0.035 N/A 0.135 N/A 0.030 N/A 0.275 N/A 0.201 N/A 0.070 N/A 0.1120-40 UNJC-3B
K7231-06 N/A 0.035 N/A 0.227 N/A 0.138 N/A 0.141 N/A 0.035 N/A 0.161 N/A 0.030 N/A 0.305 N/A 0.228 N/A 0.080 N/A 0.1380-32 UNJC-3B
K7231-08 N/A 0.040 N/A 0.280 N/A 0.164 N/A 0.160 N/A 0.040 N/A 0.200 N/A 0.030 N/A 0.365 N/A 0.281 N/A 0.130 N/A 0.1640-32 UNJC-3B
K7231-3 N/A 0.040 N/A 0.280 N/A 0.190 N/A 0.160 N/A 0.040 N/A 0.225 N/A 0.030 N/A 0.365 N/A 0.281 N/A 0.140 N/A 0.1900-32 UNJF-3B
K7231-1024 N/A 0.040 N/A 0.280 N/A 0.190 N/A 0.160 N/A 0.040 N/A 0.225 N/A 0.030 N/A 0.365 N/A 0.281 N/A 0.140 N/A 0.1900-24 UNJC-3B
K7231-4 N/A 0.074 N/A 0.374 N/A 0.250 N/A 0.210 N/A 0.050 N/A 0.296 N/A 0.036 N/A 0.465 N/A 0.375 N/A 0.250 N/A 0.2500-28 UNJF-3B
K7231-420 N/A 0.074 N/A 0.374 N/A 0.250 N/A 0.210 N/A 0.050 N/A 0.296 N/A 0.036 N/A 0.465 N/A 0.375 N/A 0.250 N/A 0.2500-20 UNJC-3B
Unit of Measure
1