Table 411. Oversize Data (Unified Coarse 1-1/2 Diameter)
Nominal Thread Size Heli-Coil P/N Effect. Correc. to Oversize Hole
4-40 3885-04CN 168 .0034
6-32 3885-06CN 207 .0040
8-32 3885-2CN 246 .0040
10-24 3885-3CN 285 .0050
1/4-20 3885-4CN 375 .0060
5/16-18 3885-5CN 469 .0060
3/8-16 3885-6CN 562 .0066
7/16-14 3885-7CN 656 .0074
1/2-13 3885-8CN 750 .0056
UNIFIED FINE 1-1/2 DIAMETER
4-48 3891-04CN 168 .0030
6-40 3891-06CN 207 .0034
10-32 3891-3CN 285 .0040
1/4-28 3891-4CN 375 .0042
5/16-24 3891-5CN 469 .0050
3/8-24 3891-6CN 562 .0050
7/16-14 3891-7CN 656 .0060
1/2-20 3891-8CN 750 .0060
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Repair
20-00-02/70-00-01
Table 412. Oversize Data (Unified Coarse 2 Diameter)
Nominal Thread Size Heli-Coil P/N Effect. Correc. to Oversize Hole
4-40 3885-04CN 224 .0034
6-32 3885-06CN 276 .0040
8-32 3885-2CN 328 .0040
10-24 3885-3CN 380 .0050
1/4-20 3885-4CN 500 .0060
5/16-18 3885-5CN 625 .0060
3/8-16 3885-6CN 750 .0066
7/16-14 3885-7CN 875 .0074
1/2-13 3885-8CN 1000 .0056
UNIFIED FINE 2 DIAMETER
4-48 3891-04CN 224 .0030
6-40 3891-06CB 276 .0034
10-32 3891-3CN 380 .0040
1/4-28 3891-4CN 500 .0042
5/16-24 3891-5CN 625 .0050
3/8-24 3891-6CN 750 .0050
7/16-20 3891-7CN 875 .0060
1/2-20 3891-8CN 1000 .0060
Table 413. Oversize Data (Unified Coarse 2-1/2 Diameter)
Nominal Thread Size Heli-Coil P/N Effect. Correc. to Oversize Hole
4-40 3885-04CN 280 .0034
6-32 3885-06CN 345 .0040
8-32 3885-2CN 410 .0040
10-24 3885-3CN 475 .0050
1/4-20 3885-4CN 625 .0060
5/16-18 3885-5CN 781 .0060
3/8-16 3885-6CN 938 .0066
7/16-14 3885-7CN 1094 .0074
1/2-13 3885-8CN 1250 .0056
UNIFIED FINE 2-1/2 DIAMETER
6-40 3891-06CN 345 .0034
10-32 3891-3CN 475 .0040
1/4-28 3891-4CN 625 .0042
5/16-24 3891-5CN 781 .0050
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