BM17028-4-18

BM17028418 Close Tolerance Bolt

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Datasheet. BM17028-4-18 specification

Thread Class
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.

3a

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.

RIGHT-Hand

Thread Length
A measurement of the extent of threads,including incomplete threads,along a line parallel to the longitudinal axis.

0.267in. and 0.334in. ⁓11/32"

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.

1.402in. and 1.449in. ⁓1-29/64"

Head Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.

double hexagon

Head Height
A measurement from the bottom to the top of the head,in distinction from depth.

0.154in. and 0.174in. ⁓3/16"

Width Between Flats

0.430in. and 0.439in.

Grip Diameter
The length of a straight line which passes through the center of the grip,and terminates at the circumference.

0.2485in. and 0.2495in.

Shank Unthreaded Hole Diameter
The length of a straight line which passes through the center of the shank unthreaded hole,and terminates at the inside circumference.

0.076in. first hole and 0.081in. first hole

End Item Identification
The national stock number or the identification information of the end equipment for which the item is a part.

aircraft, phantom F-4

Nominal Thread Diameter
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"

Grip Length
A measurement of the longest dimension of the grip,in distinction from width.

1.115in. and 1.135in.

Thread Quantity Per Inch
The number of threads on the item per linear inch measured on a line parallel to the thread axis.

28

Distance From Head Largest Bearing Surface To Shank Hole Center
The distance from the shank hole centerline to the largest bearing surface of the head.

1.281in. first hole and 1.338in. first hole

Material
The chemical compound or mechanical mixture properties of which the item is fabricated.

steel

Material Document And Classification
The specification,standard,or manufacturers reference,and the classification designation,such as class,condition,temper,and the like,that identifies the material.

23-105 fscm 76301 mfr ref single material response

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.

cadmium

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.

mac PS13145 fscm 76301 mfr ref 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.

unjf

Answers.

What quantity is this sold in?

1EA

What class is the thread series?

Unjf

What material is the close tolerance bolt made of ?

Steel

What is the thread quantity per inch?

28

What is the grip length?

1.115 inches minimum and 1.135 inches maximum

What is the head style?

Double hexagon

What is the thread length?

0.267 inches minimum and 0.334 inches maximum

What is the thread direction?

Right-hand

What is the thread class?

3a

What is the NSN for BM17028-4-18?

5306-00-518-5116

How is this classified for shipping?

Schedule B number: 7318152000
nmfc 093486
Bolts and bolts and their nuts or washers exported in the same shipment

What's the federal classification of BM17028-4-18?

FSC 5306 ⁓ Bolts

NSN 5306-00-518-5116 BOLT,CLOSE TOLERANCE

Used on aircraft, phantom f-4. unjf thread series cadmium surface treated 28 thread quantity per inch 1.115" grip length double hexagon head style 0.267" thread length right-hand 3a thread class

NIIN
005185116
NIIN Date
08/13/74
Schedule B
7318152000 
Name Code
27851
FIIG
A003B0
Item Weight
0.100lbs
Item Dimensions
--
QUP
Historical Price
$128.00 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

1. 73992-4D18 Cage 56878
2. MB13-4D18 Cage 73197
3. ST3M561-4D18 Cage 76301
4. MB13-4D18 Cage L4528
5. MB13-4D18 Cage C4293
6. AIC244-4D18 Cage 06725
7. PBF1225-4-18D Cage 27624
8. A1C244-4-18 Cage 06725
9. A1C244-4D18 Cage 06725
10. ST3M561-4D18 Cage 92215
11. MB13-4D18 Cage R1120
12. 73992-4D18 Cage 56878
13. MB13-4D18 Cage 73197
14. ST3M561-4D18 Cage 76301
15. MB13-4D18 Cage L4528
16. MB13-4D18 Cage C4293
17. AIC244-4D18 Cage 06725
18. PBF1225-4-18D Cage 27624
19. ST3M561-4D18 Cage 92215
20. MB13-4D18 Cage R1120
21. A1C244-4-18 Cage 06725
22. A1C244-4D18 Cage 06725

Major End Users Countries and entities

  • - Department of The Navy 
  • - Department of The Air Force 
  • - Germany 
  • - Republic of Korea 
  • - Greece 
  • - Turkey 

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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
Construction materials: includes paint and related materials, prefabricated building, wood products, metal and composition mater 
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

BM17028-4-18 / 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.