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PDF NAS1581 Data sheet ( Hoja de datos )
| Número de pieza | NAS1581 | |
| Descripción | Countersunk Screw | |
| Fabricantes | Genuine Aircraft Hardware | |
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All original Text, Tables, and
Drawings are Copyright 1994-2006
reproduction by permission only.
Genuine Aircraft Hardware Co.
NAS1581
High Strength, Close Tolerance, Reduced (Shear) Head, Countersunk Screw
Important Note! this type of fastener uses the next smaller size driver than the dia. IE: for -3 dia use TS212-8 or similar.
Kits Available
Item Number Details
NAS1581(material)(diameter)(drive style)(grip length)(option)
MATERIALS
(A)* or (F) = Alloy Steel, 4140,4340 or 8740, Heat treated to 160-180ksi. Cad 2 plated
(C) = Corrosion Resistant (A286) Steel, Heat treated to160-190ksi. Cad 2 (optional)
(V)* = Titanium (6al-4v) Heat treated to 160-180ksi. No finish
* Material Code (A) has been superseded by Code (F), Material Code (V) has been cancelled Dec.1991
Details Relating to DIAMETER
Dia. Thread Shank Dia Shank Dia Head Dia Head Dia
# Size (min) (max) (min) (max) T length
3 10-32 .1885
4 1/4-28 .2485
5 5/16-24 .3110
6 3/8-24 .3735
.1895
.2495
.3120
.3745
.2578
.3504
.4289
.5149
.3047
.3988
.4787
.5662
7 thru 10
Information Available, 7/16 thru 5/8 diameter.
.363
.403
.501
.594
DRIVE STYLE’s
(R)*= Offset Cruciform
(Torq-set)R
applicable dia.’s 3,4 & 5.
(T) = Offset Cruciform
(Torq-set)R
applicable dia.’s 6 and up.
(H) = Dovetail Slot
* With dia.’s -3, -4 and -5 the drive styles R or T are functionally interchangeable even though R is listed as preferred on the print
GRIP LENGTH
The Grip length for Countersunk Head Fasteners,
includes the head and extends to the full cylindrical
portion of the shank. The Grip Length for this
series is measured in 1/16ths of an inch. + or - .010
OPTION’s
The options are after the Grip Length. If more than
one option is used they are to be placed in order, if
one is not used, maintain the order and skip the
unused option.
IE: a grip of -4 = .240 to .260 or 1/4”
or a grip of -12 = .740 to .760 or 3/4”
Option 1, (P) = Cad 2 plating (valid with C material only)
Option 2, (X) = .0156 1st Oversize shank for repairs.
Option 3, (Y) = .0312 2nd Oversize shank for repairs.
Examples of Part Numbers
NAS1581F3R4 = Alloy Steel,Cad 2 plated,3/16 dia.(#10), 32 threads per inch, Offset Cruciform (Torq-set)R drive, 1/4” grip.
NAS1581C6T12X = Corrosion Res.(A286),3/8 dia, 24 threads per inch,Offset Cruciform (Torq-set)R drive, 3/4” grip, 1st Oversize.
R Torq-Set is a registered Trademark of Phillips Screw Company.
Documents in this book for REFERENCE ONLY, not intended for design. Not guaranteed for accuracy.
43
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