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Unit of Measure

Specifications

Head Style

N/A Protruding Tension

Type

N/A Tension

Material

N/A Nickel base alloy per AMS 5662

Finish and Lubricant

N/A Dry film lube per AS5272, Type 1 (Head & Shank only, overspray permitted) & cetyl alcohol lube per AS87132.

Nominal Diameter

N/A 1/4 in

Thread Size

N/A 0.2500-28 UNJF-3A

External Thread - Major Diameter

N/A 0.2410-0.2440 in

External Thread - Pitch Diameter

N/A 0.223 in

A

N/A 0.415-0.440 in

D - Before Finish - Aluminum Coat MIN

N/A 0.279 in

D - After Finish - All MAX

N/A 0.281 in

D - After Finish - Aluminum Coat MIN

N/A 0.280 in

D - After Finish - None MIN

N/A 0.280 in

F

N/A 0.045 in

G

N/A 0.005 in

H

N/A 0.080-0.090 in

R

N/A 0.015-0.025 in

Chamfer

N/A 1/32" x 45°

Y

N/A 0.160 in

T

N/A 0.080 in

J - MAX

N/A 0.160 in

Minimum Double Shear, pounds

N/A 15600.000 lb

Tension Pounds Minimum

N/A 7750.000 lb

Second Dash Number

N/A 2.000 in

Notes

Notes

N/A 1. Dimensions in inches & to be met after finish.
2. Surface texture per ASME B46.1.
3. "A" Concentric to "D" within 0.010 TIR. Runout of "D" to "Pitch" within "G" FIM when held on the "Pitch" of the complete threads nearest the shank and checked on the shank within one diameter of the thread runout.
4. Flute location ("K" Dimension) and geometry are inspected per HFS Specification E106.
5. Threads must accept a AS8879 "GO" ring gage to assure free running nut capability. AS8879 limits do not apply to threads in the fluted portion of the threads. The minor and pitch diameters may be up to 0.004 below AS8879 minimum values and major diameter may be up to 0.002 below sheet 1 values for a distance equal to the flute length plus 1.5P max.
6. Blended radius transition permits use in interference fit application.
7. See Table III.
8. Identify with brown paint or repackaged in clear sealed plastic bags. Each bag shall be marked with purchaser´s and manufacturer´s complete part number, manufacturer´s lot number, manufacturer´s or distributor´s name and the pack date.
10. Various nut materials and configurations available request.
11. Parts (-10 Diameter) manufactured to previous revisions with "T" Depth Min. of 0.090 are acceptable for use & may be used unti depletion of inventories.
12. Parts with a manufacture date on or after April 7, 2011; shall have the SPLINE-LOK™ recess petals removed in accordance with E121. The requirements of E121 are not applicable to parts with a manufacture date prior to April 7, 2011; These parts are acceptable for use until inventories are depleted.
13. For dimensions not shown, see Sheets 1 and 2.
14. For Material, Finish at Lube information, see Sheets 1 and 2.