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Datasheet. NAS 1142-6 specification
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
3a
A measurement of the extent of threads,including incomplete threads,along a line parallel to the longitudinal axis.
0.276in. ⁓9/32"
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.
0.651in. ⁓21/32"
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
modified pan
The length of a straight line which passes through the center of the grip,and terminates at the circumference.
0.375in.
The style designation indicating the configuration that most nearly corresponds to the appearance of the internal drive.
torque
The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.
0.164in. (UTS #8)
A measurement of the longest dimension of the grip,in distinction from width.
0.375in.
The number of threads on the item per linear inch measured on a line parallel to the thread axis.
32
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.
ultimate tensile strenght 160, 000min. to 180, 000max. pounds per sq. inch; in accordance w/ NAS1141 thru NAS1148; short thread
The chemical compound or mechanical mixture properties of which the item is fabricated.
steel corrosion resisting
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
The specification,standard,or manufacturers reference,and the classification designation,such as type,class,grade,and the like,that identifies the surface treatment material.
QQ-P-416, TY2CL2 fed spec all treatment responses
A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.
unjc
Answers.
Unjc
Steel corrosion resisting
32
0.375 inches
Modified pan
0.276 inches
3a
Schedule B number: 7318152000
Bolts and bolts and their nuts or washers exported in the same shipment
FSC 5305 ⁓ Screws
NSN 5305-01-530-9348 SCREW,CLOSE TOLERANCE
unjc thread series cadmium surface treated ultimate tensile strenght 160, 000min. to 180, 000max. pounds per sq. inch; in accordance w/ NAS1141 thru NAS1148; short thread 32 thread quantity per inch 0.375" grip length modified pan head style 0.276" thread length 3a thread class
- NIIN
- 015309348
- NIIN Date
- 06/17/05
- Schedule B
- 7318152000
- Name Code
- 29294
- 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
- - National Aeronautics And Space Administration
- - Republic of Korea
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NAS 1142-6 / Screw,close toleranceWhat is the formal definition of this item?
A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. the nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. the head is designed to be held or driven with an inserted driver. it is not designed for rotation by the thumb and fingers. a locking feature may be incorporated in the design of the head or threads.
