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DH Anco Pin-Lock Nut, Galvanized

Anco lock nuts are manufactured from heavy hex ASTM A563 Grade DH nuts that have an added stainless steel ratchet pin. The ratchet pin slides along the threads as the nut is threaded onto the bolt, which prevents the nut from backing off. The Anco style lock nut has an added feature in that the ratchet pin can be bent so that the nut can be removed, if needed. Dimensional specifications are governed by ASME B18.2.2. Available in hot dipped galvanized finish for corrosion resistance.

Products
Governing Standards
Mechanical Properties
Chemical Properties
Dimensional Specifications

Mechanical Properties

Mechanical PropertiesGrade DH

Carbon & Alloy Steel		Per ASTM A563-2015
Diameter	Proof Load Stress (1)		Core Hardness
	ksi		Rockwell
	Non Zinc- Coated (2)	Zinc- Coated (2)	Min	Max
1/4" thru 4" (3)	175	150	C24	C38

1. To determine nut proof load in pounds, multiply the appropriate nut proof load stress by the tensile stress area of the thread.
2. Non-zinc-coated nuts are nuts intended for use with externally threaded fasteners which have a plain (nonplated or noncoated) finish or have a plating or coating of insufficient thickness to necessitate overtapping the nut thread to provide assemblability. Zinc-coated nuts are nuts intended for use with externally threaded fasteners which are hot-dip zinc-coated, mechanically zinc-coated, or have a plating or coating of sufficient thickness to necessitate overtapping the nut thread to provide assemblability.
3. Nuts made in accordance with the requirements of Specification A194/A194M, Grade 2H, and marked with its grade symbol are an acceptable equivalent for Grade DH nuts. When A194 zinc-coated inch series nuts are supplied, the zinc coating, overtapping, lubrication and rotational capacity testing shall be in accordance with Specification A563.

Dimensional Specifications

Dimensional SpecificationsGrade DH

Per ASME B18.2.2-2015
Nominal Diameter		UNC	F			G		H
			Width Across Flats			Width Across Corners		Thickness
			Basic	Max	Min	Max	Min	Basic	Max	Min
1/4	0.250	20	1/2	0.500	0.488	0.577	0.556	15/64	0.250	0.218
5/16	0.313	18	9/16	0.562	0.546	0.650	0.220	19/64	0.314	0.280
3/8	0.375	16	11/16	0.688	0.669	0.794	0.763	23/64	0.377	0.341
7/16	0.438	14	3/4	0.750	0.728	0.866	0.830	27/64	0.441	0.403
1/2	0.500	13	7/8	0.875	0.850	1.010	0.990	31/64	0.504	0.464
9/16	0.563	12	15/16	0.938	0.909	1.083	1.037	35/64	0.568	0.526
5/8	0.625	11	1 1/16	1.062	1.031	1.227	1.175	39/64	0.631	0.587
3/4	0.750	10	1 1/4	0.250	1.212	1.443	1.382	47/64	0.758	0.710
7/8	0.875	9	1 7/16	1.438	1.394	1.660	1.589	55/64	0.885	0.833
1	1.000	8	1 5/8	1.625	1.575	1.876	1.796	63/64	1.012	0.956
1 1/8	1.125	7	1 13/16	1.812	1.756	2.093	2.002	1 7/64	1.139	1.079
1 1/4	1.250	7	2	2.000	1.380	2.309	2.209	1 7/32	1.251	1.187
1 3/8	1.375	6	2 3/16	2.188	2.119	2.526	2.416	1 11/32	1.378	1.310
1 1/2	1.500	6	2 3/8	2.375	2.300	2.742	2.622	1 15/32	1.505	1.433
1 5/8	1.625	5 1/2	2 9/16	2.562	2.481	2.959	2.828	1 19/32	1.632	1.556
1 3/4	1.750	5	2 3/4	2.750	2.662	3.175	3.035	1 23/32	1.759	1.679
1 7/8	1.875	5	2 15/16	2.938	2.844	3.392	3.242	1 27/32	1.886	1.802
2	2.000	4 1/2	3 1/8	3.125	3.025	3.608	3.449	1 31/32	2.013	1.925
2 1/4	2.250	4 1/2	3 1/2	3.500	3.388	4.041	3.862	2 13/64	2.251	2.155
2 1/2	2.500	4	3 7/8	3.875	3.750	4.474	4.275	2 29/64	2.505	2.401
2 3/4	2.750	4	4 1/4	4.250	4.112	4.907	4.688	2 45/64	2.759	2.647
3	3.000	4	4 5/8	4.625	4.475	5.340	5.102	2 61/64	3.013	2.893
3 1/4	3.250	4	5	5.000	4.838	5.774	5.515	3 3/16	3.252	3.124
3 1/2	3.500	4	5 3/8	5.375	5.200	6.207	5.928	3 7/16	3.506	3.370
3 3/4	3.750	4	5 3/4	5.750	5.562	5.562	6.341	3 11/16	3.670	3.616
4	4.000	4	6 1/8	6.125	5.925	5.925	6.755	3 15/16	4.014	3.862

All dimensions are in inches.

DH Anco Pin-Lock Nut, Galvanized

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ASTM A563	Covers the chemical and mechanical requirements for eight grades of carbon and alloy steel nuts for general structural and mechanical uses on bolts, studs, and other externally threaded parts.
ASME B18.2.2	Covers the complete general and dimensional data for the various types of inch series square and hex nuts, including machine screw nuts and coupling nuts.
ASME B1.1 UNC & UNF Class 2B	Specifies the thread form, series, class, allowance, tolerance, and designation for unified screw threads.

Per ASTM A563-2015
Grade	Material	Carbon	Manganese	Phosphorus	Sulfur
Grade	Material	% by weight	% by weight	% by weight	% by weight
DH (1)	Carbon & Alloy Steel	0.20-0.55	0.60	0.04	0.05

DH Anco Pin-Lock Nut, Galvanized

Technical Data

Governing Standards

Governing StandardsGrade DH

Mechanical Properties

Mechanical PropertiesGrade DH

Chemical Properties

Chemical PropertiesGrade DH

Dimensional Specifications

Dimensional SpecificationsGrade DH

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1/4-20 A563 DH ANCO PIN-LOCK NUT, GALVANIZED

1/2-13 A563 DH ANCO PIN-LOCK NUT, GALVANIZED