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Datasheet. 21251 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
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.
5.000in. ⁓5-1/64"
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
flat countersunk
The length of a straight line which passes through the center of a circular head,and terminates at the circumference.
2.031in.
The style designation indicating the configuration that most nearly corresponds to the appearance of the point.
oval
The style designation indicating the configuration that most nearly corresponds to the appearance of the internal drive.
w/o internal drive
The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.
1.125in. ⁓1-1/8"
The number of threads on the item per linear inch measured on a line parallel to the thread axis.
7
The included angle of the countersink.
78.0 degrees
Those unusual or unique characteristics or qualities of an item not covered in the other requirements and which are determined to be essential for identification.
one drilled slot on side of head, 0.188 inch in width
The chemical compound or mechanical mixture properties of which the item is fabricated.
steel comp 4140
The specification,standard,or manufacturers reference,and the classification designation,such as class,condition,temper,and the like,that identifies the material.
sae assn std 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.
5EA
Unc
Steel comp 4140
7
Flat countersunk
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 5305-01-158-6765 SETSCREW
unc thread series one drilled slot on side of head, 0.188 inch in width 7 thread quantity per inch flat countersunk head style right-hand 2a thread class
- NIIN
- 011586765
- NIIN Date
- 07/27/83
- Schedule B
- 7318152000
- Name Code
- 06672
- FIIG
- A003B0
- QUP
- 5
- Historical Price
- $97.28 EA
- 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. | 21251-1 | Cage 20874 |
| 2. | 21251-1 | Cage 20874 |
| 3. | 21251-1 | Cage 20874 |
Major End Users Countries and entities
- - Department of The Army
Availability for 21251 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 setscrews with similar characteristics
Nothing similar to this part number was found in our inventory
21251 / SetscrewWhat is the formal definition of this item?
An externally threaded device whose threaded portion is of one nominal diameter with or without a head and having a cup, cone, or other type of machined point designed to prevent or restrict relative movement of parts and designed to be driven with either a wrench or inserted driver. a locking feature may be incorporated in the design of the head or threads.
