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Datasheet. 21512849 specification
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.
1.250in. ⁓1-1/4"
The national stock number or the identification information of the end equipment for which the item is a part.
control shaft for alco 251 diesel engine
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
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.
lever to pump rack capscrew; knurled socket head
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
20
FSC 5305 ⁓ Screws
NSN 5305-01-470-1793 SCREW,CAP,SOCKET HEAD
Used on control shaft for alco 251 diesel engine. unc thread series lever to pump rack capscrew; knurled socket head 20 thread quantity per inch
- NIIN
- 014701793
- NIIN Date
- 12/09/99
- Schedule B
- Name Code
- 16282
- FIIG
- A003B0
- 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
Major End Users Countries and entities
- - U.s. Coast Guard
- - Malaysia
- - Australia
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21512849 / Screw,cap,socket headWhat is the formal definition of this item?
An externally threaded fastener whose threaded portion is of one nominal diameter. the head has an internal socket or multiple spline for use with an inserted driver. a locking feature may be incorporated in the design of the head or threads. excludes items with bevel (conical) heads. see bolt, internal wrenching. excludes screw, shoulder; and screw, machine.
