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Datasheet. 920B644-1 specification
The number of single screw threads per inch of the threaded portion.
24 concentric hole
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
2a
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.
0.735in. ⁓3/4"
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.
0.735in. ⁓3/4"
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
hexagon
A measurement from the bottom to the top of the head,in distinction from depth.
0.218in. ⁓7/32"
0.875in.
A measurement of the extent of internal threads,including incomplete threads,along a line parallel to the longitudinal axis.
0.625in. concentric hole
The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.
0.625in. ⁓5/8"
A designation indicating the diameter-pitch combination and the number of threads per measurement scale applied to a series of diameters.
unf concentric hole
The number of threads on the item per linear inch measured on a line parallel to the thread axis.
18
A designation that is used for the purpose of general identification of the thread.
0.375in. concentric hole ⁓3/8"
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.
0.109 in. diameter 0.500 in deep head hole parallel to longitudinal axis
The chemical compound or mechanical mixture properties of which the item is fabricated.
copper alloy
The specification,standard,or manufacturers reference,and the classification designation,such as class,condition,temper,and the like,that identifies the material.
QQ-B-626, comp 22, 1/2 hard 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.
nickel
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-N-290, cl 2 fed spec single treatment response
The style designation indicating the configuration that most nearly corresponds to the appearance of the item.
concentric hole threaded
A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.
unf
Answers.
Unf
Concentric hole threaded
Copper alloy
18
Hexagon
0.735 inches
Right-hand
2a
Schedule B number: 7415338550
nmfc 093486
Other copper screws (not for wood) bolts and nuts
FSC 5306 ⁓ Bolts
NSN 5306-01-073-9170 BOLT,INTERNALLY RELIEVED BODY
unf thread series concentric hole threaded nickel surface treated 0.109 in. diameter 0.500 in deep head hole parallel to longitudinal axis 18 thread quantity per inch hexagon head style 0.735" thread length right-hand 2a thread class
- NIIN
- 010739170
- NIIN Date
- 03/23/79
- Schedule B
- 7415338550
- Name Code
- 06676
- FIIG
- A003B0
- Item Weight
- 0.100lbs
- Item Dimensions
- --
- QUP
- Historical Price
- $26.38 EA
- DEMIL / ITAR
- Uncontrolled item (Code A)
- Hazmat
- No hazard information available from HMIRS.
- MSDS
- N/A
- Precious Metals
- Metal content unknown
- 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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Request a Quote »Shipping Information
- Special Handling
- Other or no special handling required (sh)
- LTL (less than a truck load rating)
- Rating variable
- LCL (less than a car load rating)
- Unknown
- Special Cargo
- No special type of cargo code applicable
- Air Freight (Minimum cargo door size required)
- Shipment is not a consolidation and does not exceed 84 inches in any dimension.
- Customs Requirement Classification
- Instruments/equipment/supplies for radio, communications, electrical, laboratory, etc. (includes signal corps)
- Commodity (for shipments via water)
- Bolts or nuts (iron or steel),(less than 35 feet)
- NMFC (national motor freight code)
- 093486 BOLTS,NUTS OR SCREWS, NOI (SUB 3)
- UFC (universal freight code)
- 48950
Similar by Design Other bolts with similar characteristics
Nothing similar to this part number was found in our inventory
920B644-1 / Bolt,internally relieved bodyWhat is the formal definition of this item?
An externally threaded fastener whose external threaded portion is of one nominal diameter. it has a concentric hole along the longitudinal centerline which may extend a part or the full length of the bolt. the concentric hole along the centerline may be counterbored and/or internally threaded at the head end or the bolt end. the head is designed to be held or driven by an external and/or internal driver. for items having a hole(s) perpendicular to the axis which meet the concentric hole along the longitudinal centerline, see bolt, fluid passage.
