A-A-1963
March 17, 1983
COMMERCIAL ITEM DESCRIPTION
NAIL (BOX, CEMENT COATED)
The General Services Administration has authorized the use of this commercial item description in preference to type II, style 4B of Federal Specification FF-N-105.
This description covers industrial quality cement coated box nails suitable for lightwood construction where extra holding power is required.
Salient characteristics:
Design. Box nails shall have flat heads, round smooth shanks and diamond points.
Material. Steel wire shall be of good commercial quality, entirely suitable for the purpose and sufficiently ductile to insure that the finished product shall withstand, without fractures, cold bending through 180 degrees over a diameter not greater than the diameter of the wire.
Dimensions. The dimensions of box nails shall be as specified in table I.
TABLE I
|
Size |
L |
D |
H |
NO./LB |
Size |
L |
D |
H |
NO./LB |
|
2d |
1 |
.058 |
.172 |
1,252 |
7d |
2-1/8 |
.086 |
.250 |
280 |
|
3d |
1-1/8 |
.062 |
.188 |
978 |
8d |
2-3/8 |
.099 |
.266 |
190 |
|
4d |
1-3/8 |
.067 |
.203 |
680 |
9d |
2-5/8 |
.099 |
.266 |
172 |
|
5d |
1-5/8 |
.072 |
.219 |
510 |
10d |
2-7/8 |
.113 |
.297 |
119 |
|
6d |
1-7/8 |
.086 |
.250 |
315 |
|
|
|
|
|
Tolerances:
Shank diameters (D) of .076 or less shall have tolerances of + 0.002 inch. Shank diameters greater than 0.076 shall have tolerances of + 0.004 inch.
Head diameters (H) shall be + 10 percent of the specified H for hand-driven nails and as per the manufacturers’ specification for machine-driven.
Length (L) for nails 2-1/2inches or less the tolerances shall be + 1/16 inch. For nails greater than 2-1/2 inches in length the tolerances shall be + 3/32 inch.
Cement coating. Cement coating shall be applied by tumbling, mechanical dispensing device or immersion in resin, shellac or other similar material and shall not be tacky or gummy.
Holding power. Cement coated nails having nominal diameters of 0.135 inch (10 gauge, or less shall produce a minimum increase in immediate holding power, above that of an identical bright nail before cleaning, of not less than 50 percent.
Mechanical Driven Nails. Cement coatings on mechanically driven nails shall be uniform and may be applied before, during or after the fasteners are cohered into strips, clips or coils.
Cement coating (holding power). Samples shall be tested for holding power of cement coating in accordance with ASTM D 1761 (Nail Withdrawal Test), except as modified herein. The nails shall be driven, perpendicular to the grain, into sound, dry western yellow pine, hemlock, fir or larch. Evidence of less than a 50 percent average increase in holding power, above that of an identical bright nail before cleaning, shall be cause for failure of the test. Nails shall be tested within 24 hours after driving.
Workmanship. Items covered by this specification shall be true to shape, well finished, reasonably free from imperfections, clean and free of corrosion. Mechanically driven cohered items shall be uniform and properly aligned in their assembled form.
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