ASTM F3125-A325TC - Precision Bolts

PLEASE NOTE:

The new F3125 specification is a consolidation and replacement of six ASTM standards, including; A325, A325M, A490, A490M, F1852 (A325 TC), and F2280 (A490 TC). Until the F3125 specification is more widely used and until the A325 and A490 specifications have been eliminated by ASTM, we will continue to manufacture and sell A325 and A490 heavy hex structural bolts under their existing specification requirements, unless F3125 is referenced in the inquiry and/or purchase order.

ASTM F3125 Grade F1852 (A325 TC)

Structural bolts, steel, heat treated, 120 ksi minimum tensile strength.

The ASTM F3125 Grade F1852, (Also known as A325 TC bolts) specification cover heat treated, steel, tension control bolt-nut-washer assemblies, also referred to as “sets.” These assemblies are capable of developing a minimum predetermined tension when installed by applying torque to the nut, while at the same time applying a counter torque to separate the spline end from the body of the bolt using an appropriate spline drive installation tool.

Formerly under the jurisdiction of Committee F16 on Fasteners, the F1852 specification was withdrawn in May 2016 and replaced by Specification F3125 for High Strength Structural Bolts, Steel and Alloy Steel, Heat Treated, 120 ksi Minimum Tensile Strength, Inch and Metric Dimensions.

Specifications

Types of F1852 Bolts

Dimensions & Markings

Bolt Diam.	E	F	H		T	S
	Body Diam.	Head Diam.	Height		Thread Length	With Across Spline
	Max	Max	Max	Min	Basic	Basic
5/8-11	0.642	1.313	0.403	0.378	1.25	0.43
3/4-10	0.768	1.580	0.483	0.455	1.38	0.53
7/8-9	0.895	1.880	0.563	0.531	1.50	0.61
1-8	1.022	2.158	0.627	0.591	1.75	0.70
1 1/8-7	1.149	2.375	0.718	0.658	2.00	0.80
1 1/4-7	1.277	2.760	0.813	0.749	2.00	0.40
1 3/8-6	1.404	2.910	0.878	0.810	2.25	1.00
1 1/2-6	1.531	3.160	0.974	0.902	2.25	1.10

This table is inspired by Table 7 from ASME B18.2.6 standard.

F3125 Grade F1852 Dimensions, Threads & Grade Marking
	Type 1	Type 3
Style Heavy Hex Bolts
Dimensions, ASME^B	B18,2,6	B18,2,6
Thread Fit, ASME^B	B1.1 UNC 2A	B1.1 UNC 2A
Grade Marking^{A, D}	A325TC	A325TC

^A A325 and A325M bolts lengths up to 4D which are fully threaded but which are not required to be fully threaded by the relevant ASME standard shall be marked with a “T”, see Supplementary Requirement S1. Bolts with any other non-standard dimensions, including thread length, shall be marked with an “S”, see Supplementary Requirement S2.
^B Manufactured to the latest revision at the time of manufacture, UNC for inch series and Metric Coarse (MC) for Metric Series.

^C Previously used markings may be sold and used indefinitely, bolts must be manufactured to current marking requirements upon initial publication of this standard.
^D Other distinguishing markings for type 3 are permitted at the manufacturers option.

Source: The table above is inspired by Table 1 from the ASTM F3125 Standard that you can purchase on the ASTM Website

F3125 Grade F1852-1 Chemical Properties

Chemical Requirements^C For ASTM F3125 Grade A325-1 & F1852-1 Bolts
Element	Carbon or Alloy^D with or Without Boron
Carbon	0.30 - 0.52
Manganese, min	0.60 min
Phosphorus Max	0.035
Sulfur Max	0.040
Silicon	0.15 - 0.30
Boron	0.003 max
Copper	^B
Nickel	^B
Chromium	^B
Vanadium	^B
Molybdenum	^B
Titanium	^B

^B Not Specified.
^C Product analysis that is outside the specified range is permitted provided it is within 10% of the value required of the heat analysis. For example Heat analysis C 0.30-0.52 = Product analysis C 0.27-0.57 or Phosphorus max Heat analysis 0.040 = Product analysis 0.044.
^D Steel, as defined by the American Iron and Steel Institute, shall be considered to be alloy when the maximum of the range given for the content of alloying elements exceeds one or more of the following limits: Manganese, 1.65 %; silicon, 0.60 %; copper, 0.60 % or in which a definite range or a definite minimum quantity of any of the following elements is specified or required within the limits of the recognized field of constructional alloy steels: aluminum, chromium up to 3.99 %, cobalt, columbium, molybdenum, nickel, titanium, tungsten, vanadium, zirconium, or any other alloying elements added to obtain a desired alloying effect.

Source: The table above is inspired by Table 2 from the ASTM F3125 Standard that you can purchase on the ASTM Website

F3125 Grade F1852-3 Chemical Properties

Chemical Requirements^C For ASTM F3125 Grade A325-3 & F1852-3 Bolts
Element	Composition A	Composition B	Based on Corrosion Index^E
Carbon	0.33 - 0.40	0.38 - 0.48	0.30 - 0.52 max
Manganese	0.90 - 1.20	0.70 - 0.90	0.60 min
Phosphorus Max	0.035	0.035	0.035
Sulfur Max	0.040	0.040	0.040
Silicon	0.15 - 0.30	0.30 - 0.50	^B
Boron	^B	^B	^B
Copper	0.25 - 0.45	0.20 - 0.40	0.20 - 0.60B
Nickel	0.25 - 0.45	0.50 - 0.80	0.20B, C min
Chromium	0.45 - 0.65	0.50 - 0.75	0.45B min
Vanadium	^B	^B	^B
Molybdenum	^B	0.06 max	0.10B, C min
Titanium	^B	^B	^B

^B Not Specified.
^C Product analysis that is outside the specified range is permitted provided it is within 10% of the value required of the heat analysis. For example Heat analysis C 0.30-0.52 = Product analysis C 0.27-0.57 or Phosphorus max Heat analysis 0.040 = Product analysis 0.044.
^E Type 3 bolts conforming to Table 2, or Type 3 bolts which have a copper minimum Heat Analysis of 0.20% and a Corrosion Index of 6 or higher as calculated from the Heat Analysis as described in Guide G101 Predictive method based on the data of Larabee and and Coburn shall be accepted: I = 26.01 (% Cu) + 3.88 (% Ni) + 1.20 (% Cr) + 1.49 (% Si) + 17.28 (% P) – 7.29 (% Cu) (% Ni) – 9.10 (%Ni) (% P) – 33.39 (% Cu)2

Source: The table above is inspired by Table 2 from the ASTM F3125 Standard that you can purchase on the ASTM Website

Permitted Coating

PERMITTED COATING^H
	B695^A	F2329^A	F1136^E,G	F2833^F,G
Bolt	Mechanically Deposited Zinc	Hot-Dip Galvanized	Zinc/Aluminum	Zinc/Aluminum
F1852	Class 55	Not Approved	Not Approved	Not Approved
DIMENSIONAL LIMITS	BOLT PITCH DIAM.	BOLT PITCH DIAM.	BOLT PITCH DIAM.	BOLT PITCH DIAM.
	OS AFTER COATING^C	OS AFTER COATING^C,D	OS AFTER COATING^C	OS AFTER COATING^C
	IN.	IN.	IN.	IN.
1/2-13 UNC	0.018	Not Approved	Not Approved	Not Approved
5/8-11 UNC	0.020	Not Approved	Not Approved	Not Approved
3/4-10 UNC	0.020	Not Approved	Not Approved	Not Approved
7/8-9 UNC	0.022	Not Approved	Not Approved	Not Approved
1-8 UNC	0.024	Not Approved	Not Approved	Not Approved
1 1/8-7 UNC	0.024	Not Approved	Not Approved	Not Approved
1 1/4-7 UNC	0.024	Not Approved	Not Approved	Not Approved
1 3/8-6 UNC	0.027	Not Approved	Not Approved	Not Approved
1 1/2-6 UNC	0.027	Not Approved	Not Approved	Not Approved

^A Supplementary nut lubrication to A563 S1 is required for hot dip and mechanically deposited zinc coatings.
^C Bolt pitch oversize limit in case of dispute. Material within the plain gauge limits which meets the coating thickness requirements and assembles freely need not be
measured to this tolerance.
^D Hot-Dip galvanized is typically tapped after coating. Others coatings are typically applied after nut tapping.
^E Grade 5 of this coating meets the supplementary lubrication requirements of A563 S1.
^F Grade 1 of this coating meets the supplementary lubrication requirements of A563 S1.
^G Nuts overtapped for coating for use with 150 ksi/1040 MPa minimum tensile strength fasteners shall be proof load tested to a minimum of 175,000 psi after overtapping.
^H Other metallic and non-metallic coatings may be used on 120 ksi/830 MPa minimum tensile fasteners upon agreement between the purchaser and user. Performance
requirements shall be specified by the purchaser and agreed to in writing. Coatings for 150 ksi/1040 MPa bolts must be qualified.
OS = over-size
Source: The table above is inspired by Table A1.1 from the ASTM F3125 Standard that you can purchase on the ASTM Website

Tensile Strength Requirements

F3125 Grade A325 & F1852 TENSILE STRENGHT REQUIREMENTS FOR BOLTS TESTED FULL SIZE
	Stress Area^A	Tensile Min.	Proof Load^C Min.	Proof Load^D Min.
in.	in².	ft-lb	ft-lb	ft-lb
1/2-13	0.142 in².	17 050 ft-lb	12 050 ft-lb	13 050 ft-lb
5/8-11	0.226 in².	27 100 ft-lb	19 200 ft-lb	20 800 ft-lb
3/4-10	0.334 in².	40 100 ft-lb	28 400 ft-lb	30 700 ft-lb
7/8-9	0.462 in².	55 450 ft-lb	39 250 ft-lb	42 500 ft-lb
1-8	0.606 in².	72 700 ft-lb	51 500 ft-lb	55 750 ft-lb
1 1/8-7	0.763 in².	91 600 ft-lb^B	64 900 ft-lb^B	70 250 ft-lb^B
1 1/4-7	0.969 in².	116 300 ft-lb^B	82 400 ft-lb^B	89 200 ft-lb^B
1 3/8-6	1.155 in².	138 600 ft-lb^B	98 200 ft-lb^B	106 300 ft-lb^B
1 1/2-6	1.405 in².	168 600 ft-lb^B	119 500 ft-lb^B	129 300 ft-lb^B
Above Values Based On	*	120 000 psi	85 000 psi	92 000 psi

^A The stress area is calculated as follows for inch: AS = 0.7854 [D – (0.9743/P)]2; for Metric: AS = 0.7854 (D – 0.9382P)2; where AS = Stress Area, D = Nominal Bolt Size, and P = thread pitch.
^B Previous versions of A325 and F1852 required tensile testing based on 105 ksi min. tensile strength for larger diameters, and proof load testing of 74 ksi (length measurement method) and 81 ksi (yield strength method). This specification was changed to align with AISC/RCSC design and installation values and metric equivalent strength levels.
^C Proof load length measurement.
^D Alternative Proof load Yield Strength Method.

Source: The table above is inspired by Table 4 from the ASTM F3125 Standard that you can purchase on the ASTM Website

TENSILE STRENGHT REQUIREMENTS FOR SPECIMENS MACHINED BOLTS
F3125 Grade A325 & F1852	Tensile, min.	Tensile, max.	Yeld min,	Elong. in 4D, min. %	Red. of Area min. %
F3125 Grade A325 & F1852	120 000 Psi	*	92 000 Psi	14	35

When the length of the bolt makes full-size testing impractical, machined specimens shall be tested and shall conform to the requirements specified in Table 5.

The table above is inspired by Table 5 from the ASTM F3125 Standard that you can purchase on the ASTM Website

Connection Types

Matching Components

F3125 Grade A325, A490, F1852 & F2280 Matching Components
	Type 1	Type 3
Recommended Nut and Washer
Plain Nut	A563 DH	A563 DH3
Suitable Alternative^E	DH3, D, C, C3	C3
Coated Nut	A563 DH	A563 DH3
Flat, Bevel or Thick washer if used	F436-1	F436-3

^E ASTM A194/A194M 2H heavy hex nuts may be used in place of A563 DH nuts on type 1 A325, A490, F1852 and F2280 bolts. When coated, the same requirements of A563 and this specification, and Annex A1, including overtap, coating, rotational capacity and proof load testing apply.

Source: The table above is inspired by Table 1 from the ASTM F3125 Standard that you can purchase on the ASTM Website

Hardness Requirements

HARDNESS REQUIREMENTS FOR F3125 GRADE A325 & F1852 BOLTS
		Brinell HB		Rockwell HRC
		Min	Max	Min	Max
Up to 1" INCLUSIVE	Less than 2D	253	319	25	34
Up to 1" INCLUSIVE	2D and longer	---	319	---	34
Over 1"	Less than 3D	253	319	25	34
Over 1"	3D and longer	---	319	---	34

10.2 Hardness:
10.2.1 Bolts shall conform to the hardness in Table 6. For
lots on which both hardness and tension tests are performed,
acceptance based on tensile requirements shall take precedence
in the event of low hardness readings.

Source: The table above is inspired by Table 6 from the ASTM F3125 Standard that you can purchase on the ASTM Website

Kegs & Skids Quantities

Diam. 3/4'' Keg Qty

DIAM: 3/4	FULL KEG		MINI KEG
LENGTH	BOLTS/KEG	LBS/KEG	BOLTS/MINI KEG	LBS/MINI KEG	BOLTS/SKID	LBS/SKID
1 3/4	N/A	N/A	95	34.68	2565	936.23
2	280	190.40	90	61.20	2430	1698.30
2 1/4	270	191.70	85	60.35	2295	1629.45
2 1/2	250	185	80	59.20	2160	1598.40
2 3/4	250	192.50	80	61.60	2160	1663.20
3	220	176	75	60	2025	1620
3 1/4	210	174.30	75	62.25	2025	1680.75
3 1/2	200	172	70	60.20	1890	1625.40
3 3/4	190	169.10	70	62.30	1890	1682.10
4	170	156.40	70	64.40	1890	1738.8
4 1/4	170	161.50	N/A	N/A	N/A	N/A
4 1/2	170	166.60	70	68.60	1890	1852.20
4 3/4	160	163.20	70	71.40	1890	1927.80
5	150	157.50	N/A	N/A	N/A	N/A
5 1/2	140	155.40	N/A	N/A	N/A	N/A
6	130	152.10	50	58.50	1350	1579.50

Precision Bolts provide structural TC Bolts in both Mini and Full kegs sizes.
Kegs and skids weight is an approximation. The real weight may slightly differ from what is shown here.
Other Lengths could be available upon request

Diam. 7/8'' Keg Qty

DIAM: 7/8	FULL KEG		MINI KEG
LENGTH	BOLTS/KEG	LBS/KEG	BOLTS/MINI KEG	LBS/MINI KEG	BOLTS/SKID	LBS/SKID
2	200	208	N/A	N/A	N/A	N/A
2 1/4	190	207.10	N/A	N/A	N/A	N/A
2 1/2	180	204.30	N/A	N/AE	N/A	N/A
2 3/4	160	188	N/A	N/A	N/A	N/A
3	155	188.33	N/A	N/A	N/A	N/A
3 1/4	150	188.25	N/A	N/A	N/A	N/A
3 1/2	140	181.30	N/A	N/A	N/A	N/A
3 3/4	140	186.90	N/A	N/A	N/A	N/A
4	130	179.40	N/A	N/A	N/A	N/A
4 1/4	130	184.60	N/A	N/A	N/A	N/A
4 1/2	120	175.80	N/A	N/A	N/A	N/A
4 3/4	110	165.55	N/A	N/A	N/A	N/A
5	110	169.95	N/A	N/A	N/A	N/A
5 1/2	100	162.50	N/A	N/A	N/A	N/A
6	100	171.50	N/A	N/A	N/A	N/A
6 1/2	80	144.40	N/A	N/A	N/A	N/A
7	70	132.65	N/A	N/A	N/A	N/A
7 1/2	60	119.10	N/A	N/A	N/A	N/A
8	N/A	N/A	N/A	N/A	N/A	N/A

Diam. 1'' Keg Qty

DIAM: 1''	FULL KEG		MINI KEG
LENGTH	BOLTS/KEG	LBS/KEG	BOLTS/MINI KEG	LBS/MINI KEG	BOLTS/SKID	LBS/SKID
2 1/4	130	178.10	N/A	N/A	N/A	N/A
2 1/2	120	171.60	N/A	N/A	N/A	N/A
2 3/4	120	178.20	N/A	N/A	N/A	N/A
3	110	169.40	N/A	N/A	N/A	N/A
3 1/4	110	176	N/A	N/A	N/A	N/A
3 1/2	100	165	N/A	N/A	N/A	N/A
3 3/4	100	171	N/A	N/A	N/A	N/A
4	90	158.40	N/A	N/A	N/A	N/A
4 1/4	90	163.80	N/A	N/A	N/A	N/A
4 1/2	80	150.40	N/A	N/A	N/A	N/A
4 3/4	80	155.20	N/A	N/A	N/A	N/A
5	80	158.40	N/A	N/A	N/A	N/A
5 1/2	70	146.30	N/A	N/A	N/A	N/A
6	60	132.60	N/A	N/A	N/A	N/A
6 1/2	50	116.50	N/A	N/A	N/A	N/A
7	40	98	N/A	N/A	N/A	N/A
7 1/2	30	77.10	N/A	N/A	N/A	N/A
8	N/A	N/A	N/A	N/A	N/A	N/A

Diam. 1-1/8'' Keg Qty

DIAM: 1 1/8''	FULL KEG*		MINI KEG		PER SKID INFOS
LENGTH	BOLTS/KEG	LBS/KEG	BOLTS/MINI KEG	LBS/MINI KEG	BOLTS/SKID	LBS/SKID
2 3/4	80	97.60	N/A	N/A	N/A	N/A
3	80	102.40	N/A	N/A	N/A	N/A
3 1/4	70	93.80	N/A	N/A	N/A	N/A
3 1/2	70	98.70	N/A	N/A	N/A	N/A
3 3/4	70	103.60	N/A	N/A	N/A	N/A
4	70	108.50	N/A	N/A	N/A	N/A
4 1/4	60	97.20	N/A	N/A	N/A	N/A
4 1/2	60	100.80	N/A	N/A	N/A	N/A
4 3/4	50	87.50	N/A	N/A	N/A	N/A
5	50	91	N/A	N/A	N/A	N/A
5 1/2	50	98	N/A	N/A	N/A	N/A
6	50	104.50	N/A	N/A	N/A	N/A
6 1/2	50	111	N/A	N/A	N/A	N/A
7	40	94	N/A	N/A	N/A	N/A
7 1/2	40	99.20	N/A	N/A	N/A	N/A
8	40	104.40	N/A	N/A	N/A	N/A

Quantity

Other Sizes are available upon request. We can manufacture custom length and thread as long as it respect the F1852 standards. Contact us to get a quotation.

Buy the ASTM F3125 Standard

TYPES OF F3125 GRADE F1852 BOLTS
TYPE 1	Carbon or Alloy with or without Boron (STANDARD)
TYPE 3	Weathering steel.
M	Metric F1852.

CONNECTION TYPES
SC	Slip critical connection.
N	Bearing type connection with threads included in the shear plane.
X	Bearing-type connection with threads excluded from the shear plane.