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Locknuts<br />

Écrous indesserrables<br />

®˜<br />

Inch<br />

Pouces<br />

C<br />

IDENTIFICATION˜<br />

GRADE C<br />

45°<br />

LOCKING˜<br />

FEATURE<br />

H<br />

F<br />

COARSE and FINE<br />

THREAD<br />

CROWNLOCK NUTS GRADE C<br />

The Gripco Grade C Crownlock Nuts are manufactured from<br />

medium carbon steel, and heat treated to meet Grade 8<br />

performance specifications. These prevailing torque nuts are<br />

designed for high-strength applications, for use with Grade 8<br />

bolts.<br />

● Six dots at 60 o intervals on the crown of the nut identify this<br />

product as a Grade C prevailing torque nut.<br />

● Cadmium and Wax Finish is being replaced by Zinc<br />

Dichromate (Gold). Cadmium will be supplied until stock<br />

is depleted.<br />

● Gripco Crownlock Nuts meet or exceed all current I.F.I.<br />

specifications.<br />

SPAENAUR No's. listed below can usually be shipped immediately from stock.<br />

Other sizes listed are available on request. Delivery 8-10 weeks. Price on request.<br />

See Price List for<br />

Unit Package Quantities.<br />

Coarse Fine Dimensions in Inches<br />

Thread SPAENAUR Thread SPAENAUR (F) WIDTH ACROSS FLATS (H) THICKNESS<br />

Size No. Size No. MAX. MIN. MAX. MIN.<br />

1/4"-20 165-318 1/4"-28 165-324 .438 .428 .226 .212<br />

5/16"-18 165-319 5/16"-24 165-325 .500 .489 .273 .258<br />

3/8"-16 165-320 3/8"-24 165-326 .562 .551 .337 .320<br />

7/16"-14 165-321 7/16"-20 165-327 .688 .675 .385 .365<br />

1/2"-13 165-322 1/2"-20 165-328 .750 .736 .448 .427<br />

9/16"-12 165-323 9/16"-18 165-329 .875 .861 .496 .473<br />

5/8"-11 165-383 5/8"-18 165-330 .938 .922 .559 .535<br />

3/4"-10 165-363▲ 3/4"-16 165-331 1.125 1.088 .665 .617<br />

7/8"-9 — 7/8"-14 — 1.312 1.269 .776 .724<br />

1"-8 165-365 1"-14 165-369 1.500 1.450 .887 .831<br />

1-1/8"-7 165-366▲ 1-1/8"-12 165-370 1.688 1.631 .999 .939<br />

1-1/4"-7 165-367▲ 1-1/4"-12 — 1.875 1.812 1.094 1.030<br />

1-1/2"-6 — 1-1/2"-12 — 2.250 2.175 1.317 1.245<br />

▲Not Gripco<br />

IDENTIFICATION˜<br />

GRADE G<br />

40°˜<br />

45°<br />

15°˜<br />

30°<br />

B<br />

LOCKING˜<br />

FEATURE<br />

● Cadmium and Wax Finish is being replaced by<br />

Zinc Dichromate (Gold). Cadmium will be<br />

supplied until stock is depleted.<br />

F<br />

H<br />

Unit Pkg. Qty.<br />

50<br />

CROWNLOCK FLANGE NUTS<br />

GRADE G<br />

The Gripco Grade G Crownlock Flange Nuts are<br />

manufactured from medium carbon steel, and heat<br />

treated to meet Grade G performance specifications.<br />

Greater height and the added hoop strength<br />

of the flange provide 30% more strength than a<br />

standard nut. These prevailing torque nuts are<br />

designed for high-strength applications, for use with<br />

Grade 8 bolts.<br />

●<br />

Six dots at 60° intervals on the top of the flange<br />

identify this product as a Grade G prevailing<br />

torque flange nut.<br />

●<br />

Gripco Crownlock Flange Nuts meet or exceed all<br />

current I.F.I. specifications.<br />

Fine<br />

Dimensions in Inches<br />

Thread SPAENAUR (F) WIDTH ACROSS FLATS (H) THICKNESS (B) FLANGE DIAMETER<br />

Size No. MAX. MIN. MAX. MIN. MAX. MIN.<br />

1/2-20 165-380* .752 .736 .550 .469 1.070 1.026<br />

1/2-20 165-381▲ .752 .736 .550 .469 1.070 1.026<br />

*Phosphate and Oil Finish<br />

▲Not Gripco<br />

CATALOG 13<br />

C44<br />

06 Feb 04<br />

See pages B155-B160 for<br />

Weld Screws and Pins.

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