Alma Bolt Company & Prime Fasteners 1-800-526-2200

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Hex Tap Bolts

Hex Tap Bolts

Also known as fully-threaded Hex Cap Screws, these bolts have a variety of uses for construction, agriculture and automotive applications. We carry a complete line of grade 2, 5 and 8, coarse thread Tap Bolts. Fine thread available on request. Available in plain and zinc finishes. Stocked in diameters from 1/4" to 2" and a full range of lengths.

Group codes represented: FTTB, FTTB5, FTTB8
Part# examples: 50U250FTTB5, 62U350FTTB8

Nominal or Basic Product Diameter
F
G
H
WIDTH ACROSS FLATS
WIDTH ACROSS CORNERS
HEAD HEIGHT
BASIC
MAX
MIN
MAX
MIN
BASIC
MAX
MIN
1/4
7/16
0.438
0.428
0.505
0.488
5/32
0.163
0.15
5/16
1/2
0.5
0.489
0.577
0.557
13/64
0.211
0.195
3/8
9/16
0.562
0.551
0.65
0.628
15/64
0.243
0.226
7/16
8-May
0.625
0.612
0.722
0.698
9/32
0.291
0.272
1/2
3/4
0.75
0.736
0.866
0.84
5/16
0.323
0.302
5/8
15/16
0.938
0.922
1.083
1.051
25/64
0.403
0.378
3/4
1-1/8
1.125
1.1
1.299
1.254
15/32
0.483
0.455
Tolerance on Length
Nominal Screw Size
Nominal Size
Up to 1in., incl.
Over 1 in. to 2-2 1/2 in., incl.
Over 2-1/2 in. to 4 in., incl.
Over 4 in. to 6 in., incl.
1/4 to 3/8
-0.03
-0.04
-0.06
-0.1
7/16 and 1/2
-0.03
-0.06
-0.08
-0.1
9/16 to 3/4
-0.03
-0.08
-0.1
-0.1
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