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NASM25027 Datasheet Preview

NASM25027 Datasheet

Thin Height Heavy Duty Hex

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Standards & Specifications
NASM25027 except as noted
www.DataSheet4U.com
FLEXLOC® Thin Height
Heavy Duty Hex
HH
W SS
C
Markings: "S" or "SPS" on .190
and larger. "C" designates cres material.
Countersink, counterbore or radius to threads
Style A
Style B
Either style to be supplied at manufacturer's option.
Dash
Type* No
Threads
See Note 5
C H S WW
Ref Max Min Max Min
FKC 420
FK 518
.250-20 UNC-2B
.312-18 UNC-2B
.552 .219 .053 .502 .492
.622 .266 .087 .564 .553
FK 616
FK 714
.375-16 UNC-2B
.437-14 UNC-2B
.696 .282 .085 .627 .616
.837 .328 .101 .752 .741
FK 813
FKC 912
.500-13 UNC-2B
.562-12 UNC-2B
.907 .328 .101 .814 .803
1.051 .368 .104 .940 .928
FK 1011
FK 1210
.625-11 UNC-2B
.750-10 UNC-2B
1.119 .399 .116 1.002 .990
1.260 .415 .121 1.127 1.115
FK 1409
.875-9 UNC-2B
FK 1608 1.000-8 UNC-2B
1.470 .477 .163 1.314 1.301
1.682 .571 .207 1.502 1.489
FK 1807 1.125-7 UNC-2B
FK 2007 1.250-7 UNC-2B
2.038 .634 .202 1.814 1.801
2.250 .759 .287 2.002 1.988
FK 2206 1.375-6 UNC-2B
FK 2406 1.500-6 UNC-2B
2.484 .818 .300 2.190 2.176
2.697 .884 .326 2.377 2.363
Dimensions are in inches. Dimensions are prior to lubrication on dry film lubricated nuts.
Axial Strength Lbs Min
Steel
& Cres Aluminum Brass
4,450
4,980
2,290
3,030
1,960
2,590
7,360
10,100
3,890
5,290
3,330
4,530
11,400 6,480
14,600 10,060
5,550
8,620
18,100 10,700 9,170
26,800 13,100 11,200
36,940 20,400 17,500
48,500 26,800 22,970
61,100 27,100 23,200
77,600 34,500 29,600
79,700 35,400 30,300
96,900 43,000 36,800
*Type
FK = FLEXLOC nut, thin height, coarse thread.
FKC = FLEXLOC nut, thin height, coarse thread, heavy hex.
Aerospace Fasteners Group
Page
No. 14




SPS

NASM25027 Datasheet Preview

NASM25027 Datasheet

Thin Height Heavy Duty Hex

No Preview Available !

Standards & Specifications
NASM25027 except as noted
www.DataSheet4U.com
FLEXLOC® Thin Height
Heavy Duty Hex
1. Material
Steel, Carbon
Steel, Corrosion resistant austenitic
Brass, Naval half hard
Aluminum, 2024-T4 or 2024-T351
2. Finish
Cadmium plate per QQ P-416, Type I, Class 2
Cadmium plate per QQ-P-416, Type II, Class 2
Silver plate per AMS 2410
Zinc plate per ASTM B633, Type II
Anodize per MIL-A-8625
3. Lubricant
Unless otherwise specified, parts shall be supplied with a non-dry lubricant (wax type) soluble in
the cleaner specified in NASM25027. Dry film lubricant per NASM25027 when specified.
4. Locking torque per NASM25027 as applicable. Reusability for unplated corrosion resistant nuts not
required per NASM25027.
5. Threads Class 2B are per NASM25027 prior to lubrication per MIL-S-7742.
6. Surface Texture USAS B46.1 unless otherwise specified, the surface texture shall not exceed 125 microinches.
7. Part Numbers
SPS part numbers consist of the following, plus the "type", plus applicable dash number.
20-Steel, sizes 1/4 thru 7/16
30-Steel, sizes 1/2 thru 1-1/2
21-Steel, cadmium plated, Type I, sizes 1/4 thru 7/16
31-Steel, cadmium plated, Type I, sizes 1/2 thru 1-1/2
23-Steel, zinc plated, sizes 1/4 thru 7/16
33-Steel, zinc plated, sizes 1/2 thru 1-1/2
27-Steel, cadmium plated, Type II, sizes 1/4 thru 7/16
37-Steel, cadmium plated, Type II, sizes 1/2 thru 1-1/2
28-Steel, cadmium plated, Type I, plus molybdenum disulfide dry film
lubricant, sizes 1/4 thru 7/16
38-Steel, cadmium plated, Type I, plus molybdenum disulfide dry film
lubricant, sizes 1/2 thru 1-1/2
50-Steel, corrosion resistant, passivated
59-Steel, corrosion resistant, silver plated
60-Brass
62-Brass, cadmium plated, Type I
70-Aluminum
75-Aluminum, anodized
Examples: 31 FK-1210 = .7500-10 UNC-2B, Type I, cadmium plated steel nut
8. Part numbers other than listed on this drawing shall not be used.
*Type
FK = FLEXLOC nut, thin height, coarse thread.
FKC = FLEXLOC nut, thin height, coarse thread, heavy hex.
Aerospace Fasteners Group
Page
No. 15


Part Number NASM25027
Description Thin Height Heavy Duty Hex
Maker SPS
Total Page 2 Pages
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