HT8137-4-18AS

HT8137418AS Close Tolerance Screw

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Datasheet. HT8137-4-18AS 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.

0.443in. and 0.510in. ⁓33/64"

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.

1.578in. and 1.625in. ⁓1-5/8"

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

flat countersunk undercut

Head Diameter
The length of a straight line which passes through the center of a circular head,and terminates at the circumference.

0.502in. and 0.507in.

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

0.071in. and 0.073in. ⁓5/64"

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

0.2490in. and 0.2495in.

Internal Drive Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the internal drive.

HIGH-Torque

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

Countersink Angle
The included angle of the countersink.

100.0 degrees

Surface Finish
Designates the specific surface roughness rating,representing the arithmetic average deviation of the surface from the meanline in profile.

32.0 microinches grip

Surface Finish
Designates the specific surface roughness rating,representing the arithmetic average deviation of the surface from the meanline in profile.

32.0 microinches threads

Special Features
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.

furnish with one o ring

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

titanium alloy

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.

NAS621 assn std single material 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 screw made of ?

Titanium alloy

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?

Flat countersunk undercut

What is the thread length?

0.443 inches minimum and 0.510 inches maximum

What is the thread direction?

Right-hand

What is the thread class?

3a

What is the NSN for HT8137-4-18AS?

5305-01-132-0514

How is this classified for shipping?

Schedule B number: 8109900000
nmfc 136500
Zirconium and articles thereof nesoi

What's the federal classification of HT8137-4-18AS?

FSC 5305 ⁓ Screws

NSN 5305-01-132-0514 SCREW,CLOSE TOLERANCE

unjf thread series furnish with one o ring 28 thread quantity per inch 1.115" grip length flat countersunk undercut head style 0.443" thread length right-hand 3a thread class

NIIN
011320514
NIIN Date
05/22/82
Schedule B
8109900000 
Name Code
29294
FIIG
A003B0
Item Weight
0.100lbs
Item Dimensions
--
QUP
Historical Price
$24.60 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. HT271A4-18 Cage 73197
2. 110179-4-18AS Cage 80539
3. BM33024V4-18U Cage 17446
4. HT271A4-18 Cage L4528
5. 110179-4-18AS Cage K5673
6. ST3M430V4-18AS Cage 92215
7. ST3M430V4-18AS Cage 76301
8. BM33024V4-18U Cage 97928
9. 10115305 Cage A486G

Major End Users Countries and entities

  • - Department of The Navy 
  • - Finland 
  • - Spain 
  • - Malaysia 
  • - Australia 
  • - Canada 

Availability for HT8137-4-18AS A member of our team will provide you with a price and availability quote

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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)
Metal hardware 
NMFC (national motor freight code)
136500 METAL NOI/METAL ALLOYS NOI 
UFC (universal freight code)
68455 

Similar by Design Other screws with similar characteristics

Nothing similar to this part number was found in our inventory

HT8137-4-18AS / Screw,close toleranceWhat is the formal definition of this item?

A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. the nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (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 designed to be held or driven with an inserted driver. it is not designed for rotation by the thumb and fingers. a locking feature may be incorporated in the design of the head or threads.