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Datasheet. 6640B 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.
0.250in. ⁓1/4"
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.
0.250in. ⁓1/4"
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
binding
The length of a straight line which passes through the center of a circular head,and terminates at the circumference.
0.171in. and 0.181in.
A measurement from the bottom to the top of the head,in distinction from depth.
0.046in. ⁓3/64"
The style designation indicating the configuration that most nearly corresponds to the appearance of the internal drive.
slot
The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.
0.086in. (UTS #2)
The number of threads on the item per linear inch measured on a line parallel to the thread axis.
56
The chemical compound or mechanical mixture properties of which the screw is fabricated.
plastic polyamide
The specification,standard,or manufacturers reference,and the classification designation,such as class,condition,temper,and the like,that identifies the screw material.
MIL-P-17091, ty 1 mil spec single material 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.
1EA
Unc
56
Binding
0.250 inches minimum
Right-hand
2a
Schedule B number: 3926909987
nmfc 096640
Articles of plastics & articles of other materials of heading 3901 to 3914
FSC 5305 ⁓ Screws
NSN 5305-00-687-6885 SCREW,MACHINE
unc thread series 56 thread quantity per inch binding head style 0.250" thread length right-hand 2a thread class
- NIIN
- 006876885
- NIIN Date
- 01/01/63
- Schedule B
- 3926909987
- Name Code
- 06657
- FIIG
- A500D0
- Item Weight
- 2.000lbs
- Item Dimensions
- --
- QUP
- 1
- Historical Price
- $4.90 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. | 18-71-2-4 | Cage 57472 |
| 2. | C320010007 | Cage 88818 |
| 3. | 290-005-0204 | Cage 95542 |
| 4. | 100C0210-2 | Cage 13136 |
| 5. | 23-00692-004 | Cage 00724 |
| 6. | 26C808-002 | Cage 04660 |
| 7. | 330-2347-00 | Cage 95105 |
| 8. | 330-2347-000 | Cage 95105 |
| 9. | 330-2347-000 | Cage 57472 |
| 10. | 330-2347-00 | Cage 13499 |
| 11. | 101-2-56X1-4BH | Cage 02751 |
| 12. | N4-256-4 | Cage 02751 |
| 13. | 330-2347-000 | Cage 77250 |
Major End Users Countries and entities
- - Department of The Navy
- - Malaysia
Availability for 6640B 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)
- Metal hardware
- NMFC (national motor freight code)
- 096640 SCREWS, IRON OR STEEL
- UFC (universal freight code)
- 50600
Similar by Design Other screws with similar characteristics
Nothing similar to this part number was found in our inventory
6640B / Screw,machineWhat is the formal definition of this item?
An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below no. 10 (0.190 in./5 mm). no. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. a locking feature may be incorporated in the design of the head or threads. excludes bolt, clevis; bolt, externally relieved body; screw, externally relieved body; and screw, assembled washer. see also, screw, instrument; bolt, machine; bolt, internal wrenching; and screw, cap socket head.
