128156-1

1281561 Plain Round Nut

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Datasheet. 128156-1 specification

Thread Pitch Diameters
The minimum and maximum pitch diameter limits of a straight screw thread.

+2.6500/+2.6773in.

Thread Direction
The direction of the thread when viewed axially. a right-hand thread winds in a clockwise direction while a left-hand thread winds in a counterclockwise direction.

RIGHT-Hand

Drive Point Depth

0.125in.

Nut Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the nut.

round

Nut Diameter

3.745in. and 3.750in.

Nut Thickness
A measurement between the opposite flat surfaces of the nut,in distinction from length or width.

4.030in.

Drive Point Width

0.250 mils and 0.252 centimeters

Drive Point Quantity

2

Thread Series
A designation indicating the diameter-pitch combination and the number of threads per measurement scale applied to a series of diameters.

acme

Thread Quantity Per Inch
The number of threads on the item per linear inch measured on a line parallel to the thread axis.

2

Nominal Thread Size
A designation that is used for the purpose of general identification of the thread.

2.750in. ⁓2-3/4"

Answers.

What is the thread quantity per inch?

2

What is the thread direction?

Right-hand

What is the NSN for 128156-1?

5310-01-048-0556

What's the federal classification of 128156-1?

FSC 5310 ⁓ Nuts and washers

Note-nuts and washers, including specially designed, are to be classified in this fsc. a. nuts are a small metal block made in a variety of shapes such as square and hexagonal which is drilled and internally threaded. b. washers are a perforated piece of metal, leather, or other materials of various shapes or forms. they are used primarily as a seat for a bolt, nut, screw, rivet or nail to distribute pressure and prevent endwise motion over an area and/or to prevent movement between two parts by means of restraining features created by the shape of its edges.

Excluding bearing thrust washers (fsc 3120); shims (fsc 5365); ring spacers (fsc 5365); plate spacers (fsc 5365); lock rings (fsc 5365).

NSN 5310-01-048-0556 NUT,PLAIN,ROUND

2 thread quantity per inch right-hand

NIIN
010480556
NIIN Date
09/18/77
Schedule B
 
Name Code
15887
FIIG
A021A0
DEMIL / ITAR
Uncontrolled item (Code A)
Hazmat
No hazard information available from HMIRS.
MSDS
N/A
Precious Metals
Metal content unknown
Enviromental
N/A
Electrostatic ESD & EMI
No ESD or EMI sensitivity

Major End Users Countries and entities

  • - Germany 

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128156-1 / Nut,plain,roundWhat is the formal definition of this item?

A nut, circular in shape, which may have wrenching facilities such as flats, holes, protrusions, slots or splines in or on the periphery or in the face opposite the bearing surface. for items having a thickness (or height) exceeding two times the outside diameter, use post, electrical-mechanical equipment. see also nut (1), plain, knurled. (when height or thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)