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Datasheet. 3M938-3-7-5 specification
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
3a
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.
0.312in. ⁓5/16"
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
oval countersunk undercut
The length of a straight line which passes through the center of a circular head,and terminates at the circumference.
0.2966in. and 0.3016in.
A measurement from the bottom to the top of the head,in distinction from depth.
0.056in. and 0.060in. ⁓1/16"
The length of a straight line which passes through the center of the grip,and terminates at the circumference.
0.1885in. and 0.1895in.
The length of a straight line which passes through the center of the shank unthreaded hole,and terminates at the inside circumference.
0.070in. and 0.075in.
The style designation indicating the configuration that most nearly corresponds to the appearance of the internal drive.
HIGH-Torque
The national stock number or the identification information of the end equipment for which the item is a part.
F-15Sa
The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.
0.1900in. (UTS #10)
A measurement of the longest dimension of the grip,in distinction from width.
0.438in.
The number of threads on the item per linear inch measured on a line parallel to the thread axis.
32
The included angle of the countersink.
99.0 degrees and 101.0 degrees
The distance from the shank hole centerline to the largest bearing surface of the head.
0.629in. and 0.639in.
The name assigned to the item by the government agency or commercial organization controlling the design of the item.
screw, machine, 100 deg c'sunk, HI-Torque, reduced head
The chemical compound or mechanical mixture properties of which the item is fabricated.
steel comp XM-13
The specification,standard,or manufacturers reference,and the classification designation,such as class,condition,temper,and the like,that identifies the material.
ams 5629 fed spec single material response
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.
aluminum
The specification,standard,or manufacturers reference,and the classification designation,such as type,class,grade,and the like,that identifies the surface treatment material.
MIL-C-83488, type ii, class 3 mil spec single treatment 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.
unjf
Answers.
Unjf
Steel comp xm-13
32
0.438 inches
Oval countersunk undercut
0.312 inches
Right-hand
3a
Schedule B number: 7318152000
Bolts and bolts and their nuts or washers exported in the same shipment
FSC 5305 ⁓ Screws
NSN 5305-01-626-8204 SCREW,CLOSE TOLERANCE
Used on F-15SA. unjf thread series aluminum surface treated screw, machine, 100 deg c'sunk, hi-torque, reduced head 32 thread quantity per inch 0.438" grip length oval countersunk undercut head style 0.312" thread length right-hand 3a thread class
- NIIN
- 016268204
- NIIN Date
- 03/20/14
- Schedule B
- 7318152000
- Name Code
- 29294
- FIIG
- A003B0
- DEMIL / ITAR
- Uncontrolled item (Code )
- Hazmat
- No hazard information available from HMIRS.
- MSDS
- N/A
- 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. | HT4072-3-7-5 | Cage 06950 |
| 2. | HT4072-3-7-5 | Cage 17446 |
| 3. | HT4072-3-7-5 | Cage 73197 |
| 4. | HT4072-3-7-5 | Cage 80539 |
Major End Users Countries and entities
- - Department of The Air Force
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3M938-3-7-5 / 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.
