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MS51971 Nut, Plain, Hexagon-Steel, Corrosion Resisting, 300 Series, Passivated, Unc-2B

Pages 1 - 2 - 3 - 4

MS51971D

TABLE I. Dash numbers and dimensions

NOMINAL SIZE OR

BASIC MAJOR DIAMETER OF THREAD

1/4

.2500

5/16

.3125

3/8

.3750

7/16

.4375

1/2

.5000

9/16

.5625

5/8

.6250

3/4

.7500

7/8

.8750

1.0000

THREADS PER INCH

WIDTH

ACROSS

FLATS WIDTH ACROSS

CORNERS

THICKNESS

MATERIAL

NOM.

MAX. MIN.

7/16

.4375

.4280

1/2

.5000

.4890

9/16

.5625

.5510

11/16

.6875

.6750

3/4

.7500

.7360

7/8

.8750

.8610

15/16

.9375

.9220

1-1/8

1.1250

1.0880

1-5/16

1.3125

1.2690

1-1/2

1.5000

1.4500

MAX. MIN.

.5050

.4880

.5770

.5570

.6500

.6280

.7940

.7680

.8660

.8400

1.0100

.9820

1.0830

1.0510

1.2990

1.2400

1.5160

1.4470

1.7320

1.6530

NOM.

MAX. MIN.

7/32

.2260

.2120

17/64

.2730

.2580

21/64

.3370

.3200

3/8

.3850

.3650

7/16

.4480

.4270

31/64

.4960

.4730

35/64

.5590

.5350

41/64

.6650

.6170

3/4

.7760

.7240

55/64

.8870

.8310

DASH NO.

STEEL, CORROSION RESISTING

NOMINAL SIZE OR

BASIC MAJOR DIAMETER OF THREAD

1-1/8

1.1250

1-1/4

1.2500

1-3/8

1.3750

1-1/2

1.5000

1-3/4

1.7500

2.0000

2-1/4

2.2500

2-1/2

2.5000

2.3/4

2.7500

3.0000

THREADS PER INCH

4-1/2

WIDTH

ACROSS

FLATS

WIDTH ACROSS

CORNERS

THICKNESS

MATERIAL

NOM.

MAX. MIN.

1-11/16

1.6875

1.6310

1-7/8

1.8750

1.8120

2-1/16

2.0625

1.9940

2-1/4

2.2500

2.1750

2-5/8

2.6250

2.5380

3.0000

2.9000

3-3/8

3.3750

3.2620

3-3/4

3.7500

3.6250

4-1/8

4.1250

3.9880

4-1/2

4.5000

4.3500

MAX. MIN.

1.9490

1.8590

2.1650

2.0660

2.3820

2.2730

2.5980

2.4800

3.0310

2.8930

3.4040

3.3060

3.8970

3.7190

4.3300

4.1330

4.7630

4.5460

5.1960

4.9590

NOM.

MAX. MIN.

31/32

.9990

.9390

1-1/16

1.0940

1.0300

1-11/64

1.2060

1.1380

1-9/32

1.3170

1.2450

1-1/2

1.5400

1.4600

1-23/32

1.7630

1.6750

1-59/64

1.9700

1.8740

2-9/64

2.1930

2.0890

2-23/64

2.4150

2.3030

2-37/64

2.6380

2.5180

DASH NO.

STEEL, CORROSION RESISTING

Requirements:

1. Material: Steel, corrosion resisting, 300 series in accordance with FF-N-836.

2. Protective coating: Passivate in accordance with SAE-AMS 2700, Method 1, Class 4.

3. Magnetic permeability: These fasteners have a magnetic permeability of 2.0 maximum (air - 1.0) for a field strength of H = 200 Oersteds using a magnetic indicator in accordance with ASTM-A-342/A342M, Test Method 1.

4. Threads: Threads shall be in accordance with FED-STD-H28/2.

5. Part number: The MS part number consists of the MS number, plus the dash number.

Example: MS51971-1

Notes:

1. Unless otherwise specified, all dimensions in inches.

2. In the event of a conflict between the text of this standard and the references cited herein, the text of this