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Datasheet. AS21937 specification
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
3b
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.
0.250in. ⁓1/4"
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.
0.406in. ⁓13/32"
Designates the thread diameter and number of threads per specific measurement scale.
7/16IN-20
0.156in.
0.562in.
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.
unf
The shortest straight line between flats,perpendicular to the height.
1.000in. ⁓1/64"
Indicates the location of the screw thread.
internal
0.344in.
0.687in.
The element,compound,or mixture of which an item is fabricated,excluding any surface treatment.
aluminum alloy, QQ-A-225/9, alloy 7075
The chemical compound or mechanical mixture properties of which the item is fabricated.
aluminum alloy 7075
The style designation indicating the configuration that most nearly corresponds to the appearance of the item.
hexagon, internal thread, shouldered
The document designator of the specification or standard which established the item of supply.
81343-sae AS21937 manufacturers standard
Answers.
Hexagon, internal thread, shouldered
Aluminum alloy 7075
0.250 inches
Right-hand
3b
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 4730-00-821-0189 PACKING NUT
hexagon, internal thread, shouldered 0.406" overall length 0.250" thread length right-hand 3b thread class
- NIIN
- 008210189
- NIIN Date
- 01/01/62
- Schedule B
- Name Code
- 18028
- FIIG
- T385-E
- Item Weight
- 0.100lbs
- Item Dimensions
- --
- QUP
- Historical Price
- $2.43 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. | AS18280 | Cage 81343 |
| 2. | MS21937-4L | Cage 03647 |
| 3. | MS21937-4L | Cage 14397 |
| 4. | MS21937-4L | Cage 01276 |
| 5. | MS21937W4L | Cage 81343 |
| 6. | MS21937-4L | Cage 00624 |
| 7. | MS21937-4L | Cage 45681 |
| 8. | MS21937-4L | Cage 50948 |
| 9. | MS21937-4L | Cage R1120 |
| 10. | MS21937-4L | Cage 17439 |
| 11. | MS21937-4L | Cage 96906 |
| 12. | 105-01495 | Cage 79470 |
| 13. | MS21937-4L | Cage 71563 |
Major End Users Countries and entities
- - Department of The Navy
- - Department of The Army
- - Department of The Air Force
- - Bulgaria
- - Brazil
- - Spain
- - Israel
- - Malaysia
- - Canada
- - New Zealand
- - France
- - Germany
- - Republic of Korea
- - Italy
- - Greece
- - Turkey
Availability for AS21937 A member of our team will provide you with a price and availability quote
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- Special Handling
- Other or no special handling required (sh)
- LTL (less than a truck load rating)
- 70.0
- LCL (less than a car load rating)
- Unknown
- Special Cargo
- No special type of cargo code applicable
- Air Freight (Minimum cargo door size required)
- Shipment is not a consolidation and does not exceed 84 inches in any dimension.
- Customs Requirement Classification
- Construction materials: includes paint and related materials, prefabricated building, wood products, metal and composition mater
- Commodity (for shipments via water)
- Bolts or nuts (iron or steel),(less than 35 feet)
- NMFC (national motor freight code)
- 093470 BOLTS/NUTS I/S
- UFC (universal freight code)
- 48940
Similar by Design Other packing nuts with similar characteristics
Nothing similar to this part number was found in our inventory
AS21937 / 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.
