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Datasheet. 20488A specification
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
2a
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
A measurement of the extent of threads,including incomplete threads,along a line parallel to the longitudinal axis.
0.312in. ⁓5/16"
Indicates whether or not a ferrous alloy object has been subjected to a process whereby the outer portion is made substantially harder than the inner portion or core.
not casehardened
The dimension measured along the longitudinal axis with terminated points at the extreme ends of the item.
0.687in. ⁓11/16"
Designates the thread diameter and number of threads per specific measurement scale.
0.375-16
The angle of the end surface upon which the mated surface seats,expressed in degrees.
45.0
A designation distinguishing one group of screw thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.
unc
The shortest straight line between flats,perpendicular to the height.
0.750in. ⁓3/4"
Indicates the location of the screw thread.
external
The smallest length of a straight line which passes through the center of the two surfaces of a circular item,and terminates at the inside circumference.
0.078in.
The element,compound,or mixture of which an item is fabricated,excluding any surface treatment.
steel, fed std 66, comp 303
The chemical compound or mechanical mixture properties of which the item is fabricated.
steel comp 303
The style designation indicating the configuration that most nearly corresponds to the appearance of the item.
hexagon, external thread, inverted flare
Answers.
1EA
Hexagon, external thread, inverted flare
Steel comp 303
0.312 inches
Right-hand
2a
FSC 4730 ⁓ Hose, pipe, tube, lubrication, and railing fittings
Excluding air conditioning-heating fittings (fsc 4520); bituminized fiber and concrete fittings (fsc 5630); conduit boxes and fittings (fsc 5975); downspout fittings (fsc 5670); medical and surgical fittings (fsc 6515); laboratory fittings (fsc 6640); post caps and rail ends (fsc 5660); machine thread bushings and plugs (fsc 5365).
NSN 4730-01-063-3694 PACKING NUT
hexagon, external thread, inverted flare 0.687" overall length 0.312" err default right-hand 2a thread class
- NIIN
- 010633694
- NIIN Date
- 08/04/78
- Schedule B
- Name Code
- 18028
- FIIG
- T385-E
- QUP
- 1
- Historical Price
- $9.05 EA
- 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
Other Part Numbers Parts with same form, fit, and function by other manufacturers
| 1. | A3-PS-000121 | Cage U4484 |
| 2. | A3-PS-000121/2 | Cage U4484 |
Major End Users Countries and entities
- - United Kingdom
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20488A / Packing nutWhat is the formal definition of this item?
An item having internal and/or external machine thread(s) (threads other than pipe or hose series), specifically designed to retain, by means or groove(s), shoulder(s), and the like, packing and/or a packing gland within a stuffing box. see also bushing, machine thread; inverted nut, tube coupling; and nut, tube coupling. excludes packing nut, stuffing tube; and use with electrical cable, and locknut, pipe.
