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Datasheet. B18.5 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.
0.750in. ⁓3/4"
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.
3.500in. ⁓3-1/2"
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.
round
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.
0.563in. and 0.594in.
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.
0.125in. and 0.145in. ⁓5/32"
Neck Length
A measurement of the longest dimension of the neck,in distinction from width.
A measurement of the longest dimension of the neck,in distinction from width.
0.125in. and 0.156in.
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.
0.250in. ⁓1/4"
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.
20
Hardness Rating
A numeric value that reflects the hardness of an item when used in conjunction with a hardness rating scale.
A numeric value that reflects the hardness of an item when used in conjunction with a hardness rating scale.
95.0 rockwell b
Minimum Yield Strength
The stress at which a material exhibits a specified limiting deviation from the proportionality of stress or strain.
The stress at which a material exhibits a specified limiting deviation from the proportionality of stress or strain.
55000 pounds per square inch
Neck Width
A measurement taken at right angles to the length of the neck,in distinction from thickness.
A measurement taken at right angles to the length of the neck,in distinction from thickness.
0.245in. and 0.260in.
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.
steel
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.
zinc
Surface Treatment Document And Classification
The specification,standard,or manufacturers reference,and the classification designation,such as type,class,grade,and the like,that identifies the surface treatment material.
The specification,standard,or manufacturers reference,and the classification designation,such as type,class,grade,and the like,that identifies the surface treatment material.
astm B633 assn std single treatment response
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
Answers.
What class is the thread series?
Unc
What material is the square neck bolt made of ?
Steel
What is the thread quantity per inch?
20
What is the head style?
Round
What is the thread length?
0.750 inches minimum
What is the thread direction?
Right-hand
What is the thread class?
2a
How is this classified for shipping?
Schedule B number: 7318152000
Bolts and bolts and their nuts or washers exported in the same shipment
What's the federal classification of B18.5?
FSC 5306 ⁓ Bolts
NSN 5306-00-044-5623 BOLT,SQUARE NECK
unc thread series zinc surface treated 20 thread quantity per inch round head style 0.750" thread length right-hand 2a thread class
- NIIN
- 000445623
- NIIN Date
- 01/01/61
- Schedule B
- 7318152000
- Name Code
- 15939
- FIIG
- A003B0
- QUP
- Historical Price
- $44.10 HD
- 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. | ASME-B18.5 | Cage 05047 |
| 2. | FF-B-584 | Cage 81348 |
| 3. | FF-B-584 TY1CL1STAGR1 | Cage 80244 |
| 4. | MS35751-26 | Cage 96906 |
Major End Users Countries and entities
- - Department of The Army
- - National Aeronautics And Space Administration
- - National Aeronautics And Space Administration
- - National Aeronautics And Space Administration
- - Department of The Navy
- - U.s. Marine Corps
- - Department of The Air Force
- - U.s. Coast Guard
- - General Services Administration
- - Canada
- - Republic of Korea
- - Portugal
- - Greece
- - Turkey
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B18.5 / Bolt,square neckWhat is the formal definition of this item?
A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
