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Datasheet. 21529621 specification
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.
1.000in. ⁓1/64"
The national stock number or the identification information of the end equipment for which the item is a part.
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.
0.375in. ⁓3/8"
The number of threads on the item per linear inch measured on a line parallel to the thread axis.
16
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.
machine screw, bar to housing fillet 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
16
1.000 inches
Right-hand
FSC 5305 ⁓ Screws
NSN 5305-01-470-5200 SCREW,MACHINE
Used on alco 251 diesel engine. unc thread series machine screw, bar to housing fillet head 16 thread quantity per inch 1.000" thread length right-hand
- NIIN
- 014705200
- NIIN Date
- 12/22/99
- Schedule B
- Name Code
- 06657
- FIIG
- A500D0
- DEMIL / ITAR
- Uncontrolled item (Code A)
- Hazmat
- No hazard information available from HMIRS.
- MSDS
- N/A
- Precious Metals
- --
- Enviromental
- N/A
- Electrostatic ESD & EMI
- No ESD or EMI sensitivity
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21529621 / 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.
