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Datasheet. 20-101-08-29 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.
0.638in. ⁓41/64"
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.
2.730in. ⁓2-47/64"
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
dished hexagon
A measurement from the bottom to the top of the head,in distinction from depth.
0.250in. and 0.265in. ⁓17/64"
0.741in. and 0.752in.
The length of a straight line which passes through the center of the grip,and terminates at the circumference.
0.4990in. and 0.4995in.
The length of a straight line which passes through the center of the shank unthreaded hole,and terminates at the inside circumference.
0.106in. and 0.116in. first hole
The national stock number or the identification information of the end equipment for which the item is a part.
navair requirements
The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.
0.500in. ⁓1/2"
A measurement of the longest dimension of the grip,in distinction from width.
1.859in. and 1.875in.
Those features,not otherwise specified,which may be required for proper functioning of the item.
sealing ring
The number of threads on the item per linear inch measured on a line parallel to the thread axis.
20
The maximum rated load in tension applied in a longitudinal direction,per unit of cross-sectional area,that the material can withstand without rupture.
25100 pounds per square inch
The name assigned to the item by the government agency or commercial organization controlling the design of the item.
bolt, self retaining, impedance type, nickel alloy 718
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.
shank double shear strength at 51800 lbs min; nickel alloy matl rated at 220 ksi
The chemical compound or mechanical mixture properties of which the item is fabricated.
nickel alloy 718 fastener
The chemical compound or mechanical mixture properties of which the item is fabricated.
steel corrosion resisting locking feature
The specification,standard,or manufacturers reference,and the classification designation,such as class,condition,temper,and the like,that identifies the material.
AMS5662 or AMS5663 assn std single material response fastener
The specification,standard,or manufacturers reference,and the classification designation,such as class,condition,temper,and the like,that identifies the material.
AMS5678 assn std single material response locking feature
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.
passivate
The specification,standard,or manufacturers reference,and the classification designation,such as type,class,grade,and the like,that identifies the surface treatment material.
AMS-QQ-P-35 or AMS2700, method 1, cl 4 assn std 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.
1EA
Unjf
Steel corrosion resisting locking feature
Nickel alloy 718 fastener
20
1.859 inches minimum and 1.875 inches maximum
Dished hexagon
0.638 inches
Right-hand
3a
Schedule B number: 7508900000
Other articles of nickel (excluding cloth, grill & netting of nickel wire)
FSC 5306 ⁓ Bolts
NSN 5306-01-612-0688 BOLT,CLOSE TOLERANCE
Used on navair requirements. unjf thread series passivate surface treated shank double shear strength at 51800 lbs min; nickel alloy matl rated at 220 ksi bolt, self retaining, impedance type, nickel alloy 718 20 thread quantity per inch 1.859" grip length dished hexagon head style 0.638" thread length right-hand 3a thread class
- NIIN
- 016120688
- NIIN Date
- 10/02/12
- Schedule B
- 7508900000
- Name Code
- 27851
- FIIG
- A003B0
- Item Weight
- 0.000lbs
- Item Dimensions
- QUP
- 1
- Historical Price
- $396.95 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. | 125634-08-29 | Cage 56878 |
Major End Users Countries and entities
- - Department of The Navy
- - Department of The Air Force
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20-101-08-29 / Bolt,close toleranceWhat is the formal definition of this item?
An externally threaded fastener whose unthreaded portion is of a specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten-thousandths (0.0015) of an inch (0.038 mm) or less. the nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (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 not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. a locking feature may be incorporated in the design of the head or threads. for items having close tolerance, and fabricated from material having 160,000 pounds per square inch (1100 megapascals) minimum tensile strength, see bolt, shear. for items fabricated from material having less than 160,000 pounds per square inch (1100 megapascals) minimum tensile strength and not having a close tolerance, see bolt, machine.
