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Serving our customers with quality and safety first.
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Datasheet. 28988-4 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.
0.500in. ⁓1/2"
The dimension,measured along a line parallel to the longitudinal axis,from the largest bearing surface of the fastener head to the extreme opposite end,or as specifically designated for other type fasteners.
0.500in. ⁓1/2"
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
hexagon
A measurement from the bottom to the top of the head,in distinction from depth.
0.150in. and 0.163in. ⁓11/64"
0.428in. and 0.438in.
The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.
0.250in. ⁓1/4"
The number of threads on the item per linear inch measured on a line parallel to the thread axis.
20
The maximum rated load in tension applied in a longitudinal direction,per unit of cross-sectional area,that the material can withstand without rupture.
120000 pounds per square inch
A numeric value that reflects the hardness of an item when used in conjunction with a hardness rating scale.
23.0 rockwell c and 32.0 rockwell c
The stress at which a material exhibits a specified limiting deviation from the proportionality of stress or strain.
85000 pounds per square inch
The chemical compound or mechanical mixture properties of which the item is fabricated.
steel
The specification,standard,or manufacturers reference,and the classification designation,such as class,condition,temper,and the like,that identifies the material.
sae gr 5 assn std single material response
The metallic,nonmetallic,and/or chemical properties with which the item is plated,dipped,and/or coated.the treatment is designed to protect the surface(s) and cannot be wiped off.
cadmium and chromate
The specification,standard,or manufacturers reference,and the classification designation,such as type,class,grade,and the like,that identifies the surface treatment material.
sae/ams QQ-P-416 TY2CL3 fed spec single treatment response
A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.
unc
Answers.
Unc
Steel
20
Hexagon
0.500 inches maximum
Right-hand
2a
Schedule B number: 7318152000
nmfc 093486
Bolts and bolts and their nuts or washers exported in the same shipment
FSC 5305 ⁓ Screws
NSN 5305-00-068-0500 SCREW,CAP,HEXAGON HEAD
unc thread series cadmium surface treated 20 thread quantity per inch hexagon head style 0.500" thread length right-hand 2a thread class
- NIIN
- 000680500
- NIIN Date
- 01/01/63
- Schedule B
- 7318152000
- Name Code
- 18257
- FIIG
- A003B0
- QUP
- Historical Price
- $16.93 HD
- DEMIL / ITAR
- Uncontrolled item (Code A)
- Hazmat
- No hazard information available from HMIRS.
- MSDS
- N/A
- Precious Metals
- No precious metals
- 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. | 7-112-140450 | Cage 12361 |
| 2. | ASME B18.2.1 | Cage 05047 |
| 3. | 318.2 | Cage 80204 |
| 4. | MS90725-3 | Cage 96906 |
| 5. | SK-6001-6 | Cage 0EAK3 |
| 6. | D-21496-1 | Cage 90598 |
| 7. | 62500-7 | Cage 90598 |
| 8. | 95423653 | Cage 57498 |
| 9. | 015587T | Cage 59556 |
| 10. | 95053070 | Cage 51436 |
| 11. | 132848 | Cage 89646 |
| 12. | 402352308 | Cage S5686 |
| 13. | 0702060 | Cage S3002 |
| 14. | 8U56702-112 | Cage 07703 |
| 15. | B18.2.1 | Cage 80204 |
| 16. | 0251512 | Cage H0001 |
| 17. | 02200 | Cage 96046 |
| 18. | TG201271 PC6 | Cage 28839 |
| 19. | 70009-3 | Cage 95097 |
| 20. | MS35291-3 | Cage 96906 |
| 21. | MS35297-3 | Cage 96906 |
| 22. | AN65-4-4 | Cage 88044 |
| 23. | CSA46563 | Cage 82254 |
| 24. | 5305-068-0500 | Cage SCY13 |
| 25. | 5305000680500 | Cage SCY13 |
| 26. | 16257 | Cage 19422 |
| 27. | 012354-2 | Cage 1FP59 |
| 28. | AF65-4-4 | Cage 82395 |
| 29. | 402352308 | Cage 1919A |
| 30. | D-21496-1 | Cage 5RQL2 |
| 31. | 62500-7 | Cage 5RQL2 |
| 32. | 10386407 | Cage A486G |
Major End Users Countries and entities
- - Department of The Army
- - National Aeronautics And Space Administration
- - National Aeronautics And Space Administration
- - National Aeronautics And Space Administration
- - Department of The Navy
- - U.s. Marine Corps
- - Department of The Air Force
- - U.s. Coast Guard
- - General Services Administration
- - Austria
- - Finland
- - Lithuania
- - Poland
- - Brazil
- - Spain
- - Singapore
- - Kuwait
- - Morocco
- - Malaysia
- - Thailand
- - Australia
- - Belgium
- - Canada
- - New Zealand
- - France
- - Germany
- - Republic of Korea
- - United Kingdom
- - Philippines
- - Netherlands
- - Portugal
- - Italy
- - Denmark
- - Norway
- - Greece
- - Turkey
- - Nato Maintenance And Supply Agency
Availability for 28988-4 A member of our team will provide you with a price and availability quote
Request a Quote »Shipping Information
- Special Handling
- Other or no special handling required (sh)
- LTL (less than a truck load rating)
- Rating variable
- 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)
- Metal hardware
- NMFC (national motor freight code)
- 093486 BOLTS,NUTS OR SCREWS, NOI (SUB 3)
- UFC (universal freight code)
- 48950
Similar by Design Other screws with similar characteristics
Nothing similar to this part number was found in our inventory
28988-4 / Screw,cap,hexagon headWhat is the formal definition of this item?
An externally threaded fastener designed for insertion into holes in assembled parts, for mating with a preformed internal thread and for tightening or releasing by torquing the head. the threaded and unthreaded portions are both of the same nominal diameter of 0.190 inch (5 mm) or larger. head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. the thread length being the controlled dimension, the grip length is not specified. a locking feature may be incorporated in the design of the head or threads. the head is not designed to be held or driven with an inserted driver or by the thumb and fingers. excludes bolt,machine; bolt,externally relieved body; bolt,internal wrenching; and screw,cap,socket head.
