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 and basket - A286 corrosion resistant steel, heat treated.
FINISH:
  • Nut - Silver plated per AMS241.
  • Basket - Passivated per AMS2700.
FLOATABILITY: .015 radially from center min.
PROCUREMENT SPEC: NASM25027.
TEMPERATURE: to 900°F.
APPLICATION: For use with materials such as aluminium alloys, brass and copper.
AVAILABILITY: Tooled.
INSTALLATION DATA: Use Kaylock tool number KT7202 or KT7204.
MF7231 Stake Nut, Miniature, Floating, 900°F
Unit of Measure
1 

Item #

A - MAX

B - MAX

C - MIN

E REF

H - MAX

J - MIN

N - REF

W

Approx. Weight (LBS/100)

Recommended Installation Hole Dia.
+.004
-.001

Thread

MF7231-04 N/A 0.040 N/A 0.249 N/A 0.168 N/A 0.125 N/A 0.195 N/A 0.037 N/A 0.135 N/A 0.312 N/A 0.190 N/A 0.250 N/A 4-40 UNC-3B
MF7231-06 N/A 0.040 N/A 0.249 N/A 0.168 N/A 0.125 N/A 0.195 N/A 0.037 N/A 0.161 N/A 0.312 N/A 0.200 N/A 0.250 N/A 6-32 UNC-3B
MF7231-08 N/A 0.040 N/A 0.311 N/A 0.220 N/A 0.125 N/A 0.250 N/A 0.037 N/A 0.200 N/A 0.375 N/A 0.300 N/A 0.312 N/A 8-32 UNC-3B
MF7231-3 N/A 0.040 N/A 0.311 N/A 0.220 N/A 0.125 N/A 0.250 N/A 0.037 N/A 0.225 N/A 0.375 N/A 0.310 N/A 0.312 N/A 10-32 UNF-3B
MF7231-1024 N/A 0.040 N/A 0.311 N/A 0.220 N/A 0.125 N/A 0.250 N/A 0.037 N/A 0.225 N/A 0.375 N/A 0.310 N/A 0.312 N/A 10-24 UNC-3B
MF7231-4 N/A 0.090 N/A 0.374 N/A 0.280 N/A 0.160 N/A 0.279 N/A 0.047 N/A 0.296 N/A 0.437 N/A 0.560 N/A 0.375 N/A 1/4-28 UNF-3B
Unit of Measure
1