ASTM F1554 Steel Anchor Bolts

ASTM F1554 Specification for Steel Anchor Bolts, 36, 55, and 105-ksi Yield Strength

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Axial Tensile Properties for Full-Size Anchor Bolts

Nominal Size, in.	Threads/ in.	Stress Area, ^A in.²	Anchor Bolt Grade
			36		55		105
			Tensile Strength, ^B klbf	Yield Strength,^BC min, klbf	Tensile Strength, ^B klbf	Yield Strength,^BC min, klbf	Tensile Strength, ^B klbf	Yield Strength,^BC min, klbf
Unified Coarse Thread Series (UNC)
1⁄4	20 UNC	0.0318	1.89–2.54	1.15	2.4–3.0	1.75	3.98–4.27	3.34
3⁄8	16 UNC	0.0775	4.5–6.2	2.8	5.8–7.36	4.26	9.7–11.6	8.14
1⁄2	13 UNC	0.1419	8.2–11.4	5.1	10.6–13.5	7.8	17.7–21.3	14.9
5⁄8	11 UNC	0.226	13.1–18.1	8.1	17.0–21.5	12.4	28.2–33.9	23.7
3⁄4	10 UNC	0.334	19.4–26.7	12.0	25.0–31.7	18.4	41.8–50.1	35.1
7⁄8	9 UNC	0.462	26.8–37.0	16.6	34.6–43.9	25.4	57.8–69.3	48.5
1	8 UNC	0.606	35.2–48.5	21.8	45.4–57.6	33.3	75.8–90.9	63.6
1-1⁄8	7 UNC	0.763	44.3–61.0	27.5	57.2–72.5	42.0	95.4–114.4	80.1
1-1⁄4	7 UNC	0.969	56.2–77.5	34.9	72.7–92.1	53.3	121–145	102
1-1⁄2	6 UNC	1.405	81.5–112.4	50.6	105.0–133.0	77.3	176–216	148
1-3⁄4	5 UNC	1.90	110–152	68.4	142–180	104.5	238–285	200
2	41⁄2 UNC	2.50	145–200	90.0	188–238	138	312–375	262
2-1⁄4	41⁄2 UNC	3.25	188–260	117	244–309	179	406–488	341
2-1⁄2	4 UNC	4.0	232–320	144	300–380	220	500–600	420
2-3⁄4	4 UNC	4.93	286–394	177	370–468	271	616–740	518
3	4 UNC	5.97	346–478	215	448–567	328	746–896	627
3-1⁄4	4 UNC	7.100	412–568	256	532–674	390	. . .	. . .
3-1⁄2	4 UNC	8.33	483–666	300	625–791	458	. . .	. . .
3-3⁄4	4 UNC	9.66	560–773	348	724–918	531	. . .	. . .
4	4 UNC	11.08	643–886	399	831–1053	609	. . .	. . .
8 Thread Series (8 UN)
1-1⁄8	8 UN	0.790	45.8–63.2	28.4	59.2–75.0	43.4	98.8–118.5	83.0
1-1⁄4	8 UN	1.000	58.0–80.0	36.0	75.0–95.0	55.0	125–150	105
1-1⁄2	8 UN	1.492	86.5–119.4	53.7	112–142	82.1	186–224	157
1-3⁄4	8 UN	2.08	121–166	74.9	156–198	114	260–312	218
2	8 UN	2.77	161–222	99.7	208–263	152	346–416	291
2-1⁄4	8 UN	3.56	206–285	128	267–338	196	445–534	374
2-1⁄2	8 UN	4.44	258–355	160	333–422	244	555–666	466
2-3⁄4	8 UN	5.43	315–434	195	407–516	299	679–815	570
3	8 UN	6.51	378–521	234	488–618	358	814–976	684
3-1⁄4	8 UN	7.69	446–615	277	577–731	423	. . .	. . .
3-1⁄2	8 UN	8.96	520–717	323	672–851	493	. . .	. . .
3-3⁄4	8 UN	10.34	600–827	372	776–982	569	. . .	. . .
4	8 UN	11.81	685–945	425	886–1122	650	. . .	. . .
^A Stress areas extracted from ANSI/ASME B 1.1. ^BTensile properties calculated from the tensile requirements. ^C Yield strength measured at 0.2 % offset.

Minimum Body Diameter

Nominal Size, in.	Threads/ in.	Body Diameter, min, in.
		Rolled Threads A		Cut Threads B Classes 1A and 2A
		Class 1A	Class 2A	Cut Threads B Classes 1A and 2A
1⁄4	20 UNC	0.2108	0.2127	0.2367
3⁄8	16 UNC	0.3266	0.3287	0.3595
1⁄2	13 UNC	0.4411	0.4435	0.4822
5⁄8	11 UNC	0.5561	0.5589	0.6052
3⁄4	10 UNC	0.6744	0.6773	0.7288
7⁄8	9 UNC	0.7914	0.7946	0.8523
1	8 UNC	0.9067	0.9100	0.9755
1-1⁄8	7 UNC	1.0191	1.0228	1.0982
1-1⁄4	7 UNC	1.1439	1.1476	1.2232
1-1⁄2	6 UNC	1.3772	1.3812	1.4703
1-3⁄4	5 UNC	1.6040	1.6085	1.7165
2	41⁄2 UNC	1.8385	1.8433	1.9641
2-1⁄4	41⁄2 UNC	2.0882	2.0931	2.2141
2-1⁄2	4 UNC	2.3190	2.3241	2.4612
2-3⁄4	4 UNC	2.5686	2.5739	2.7111
3	4 UNC	2.8183	2.8237	2.9611
3-1⁄4	4 UNC	3.0680	3.0734	3.2110
3-1⁄2	4 UNC	3.3177	3.3233	3.4610
3-3⁄4	4 UNC	3.5674	3.5730	3.7109
4	4 UNC	3.8172	3.8229	3.9609
8 Thread Series (8UN)
1-1⁄8	8 UN	. . .	1.0348	1.1004
1-1⁄4	8 UN	. . .	1.1597	1.2254
1-1⁄2	8 UN	. . .	1.4093	1.4753
1-3⁄4	8 UN	. . .	1.6590	1.7252
2	8 UN	. . .	1.9087	1.9752
2-1⁄4	8 UN	. . .	2.1584	2.2251
2-1⁄2	8 UN	. . .	2.4082	2.4751
2-3⁄4	8 UN	. . .	2.6580	2.7250
3	8 UN	. . .	2.9077	2.9749
3-1⁄4	8 UN	. . .	3.1575	3.2249
3-1⁄2	8 UN	. . .	3.4074	3.4749
3-3⁄4	8 UN	. . .	3.6571	3.7248
4	8 UN	. . .	3.9070	3.9748
^A Minimum body diameter is the same as minimum pitch diameter. Extracted from ANSI/ASME B 1.1. ^B Minimum body diameter is the same as minimum major diameter. Extracted from ANSI/ASME B 1.1 for Class 1A.

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