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Datasheet. NAS720B4-3 specification
Thread Class
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
2a
Thread Direction
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.
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
Thread Length
A measurement of the extent of threads,including incomplete threads,along a line parallel to the longitudinal axis.
A measurement of the extent of threads,including incomplete threads,along a line parallel to the longitudinal axis.
0.107in. ⁓7/64"
Fastener Length
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.
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.
0.188in. ⁓13/64"
Head Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
pan no. 2
Head Diameter
The length of a straight line which passes through the center of a circular head,and terminates at the circumference.
The length of a straight line which passes through the center of a circular head,and terminates at the circumference.
0.205in. and 0.219in.
Head Height
A measurement from the bottom to the top of the head,in distinction from depth.
A measurement from the bottom to the top of the head,in distinction from depth.
0.058in. and 0.068in. ⁓5/64"
Washer Quantity
The number of washers included on the item.
The number of washers included on the item.
2
Internal Drive Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the internal drive.
The style designation indicating the configuration that most nearly corresponds to the appearance of the internal drive.
slot
Nominal Thread Diameter
The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.
The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.
0.112in. (UTS #4)
Thread Quantity Per Inch
The number of threads on the item per linear inch measured on a line parallel to the thread axis.
The number of threads on the item per linear inch measured on a line parallel to the thread axis.
40
Secondary Washer Relationship To Primary Washer
An indication of whether or not the secondary is identical to the primary washer.
An indication of whether or not the secondary is identical to the primary washer.
not identical
Secondary Washer Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the secondary washer.
The style designation indicating the configuration that most nearly corresponds to the appearance of the secondary washer.
flat
Primary Washer Outside Diameter
0.209in.
Secondary Washer Outside Diameter
0.213in. and 0.223in.
Primary Washer Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the primary washer.
The style designation indicating the configuration that most nearly corresponds to the appearance of the primary washer.
split helical ring
Primary Washer Material Thickness
0.025in.
Secondary Washer Material Thickness
0.013in. and 0.019in.
Material
The chemical compound or mechanical mixture properties of which the item is fabricated.
The chemical compound or mechanical mixture properties of which the item is fabricated.
copper alloy
Surface Treatment
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.
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.
tin
Thread Series Designator
A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.
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
Specification/standard Data
The document designator of the specification or standard which established the item of supply.
The document designator of the specification or standard which established the item of supply.
80205-NAS720 professional/industrial association standard
Answers.
What class is the thread series?
Unc
What material is the assembled washer screw made of ?
Copper alloy
What is the thread quantity per inch?
40
What is the head style?
Pan no. 2
What is the thread length?
0.107 inches
What is the thread direction?
Right-hand
What is the thread class?
2a
How is this classified for shipping?
Schedule B number: 7415338550
Other copper screws (not for wood) bolts and nuts
What's the federal classification of NAS720B4-3?
FSC 5305 ⁓ Screws
NSN 5305-01-412-1449 SCREW,ASSEMBLED WASHER
unc thread series tin surface treated 40 thread quantity per inch pan no. 2 head style 0.107" thread length right-hand 2a thread class
- NIIN
- 014121449
- NIIN Date
- 04/12/95
- Schedule B
- 7415338550
- Name Code
- 06660
- FIIG
- A003B0
- QUP
- Historical Price
- $0.85 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
Major End Users Countries and entities
- - Department of The Air Force
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NAS720B4-3 / Screw,assembled washerWhat is the formal definition of this item?
A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
