Hexagon Head Cap Screw

FFS85

FFS85
(NSN) National Stock Number
5305-00-266-6374
Federal Supply Classification
5305 Screws
Item Name Code
18257
Schedule B Code
7318152000
Summary

2a thread class, right-hand thread direction, 1.250 inches minimum thread length, 2.000 inches nominal fastener length, hexagon head style, 0.302 inches minimum and 0.323 inches maximum head height

DAC HCC DMIL RNCC
3 - - 4
RNVC SADC MSDS RNAAC
1 - - 75
Identification

An externally threaded fastener designed for insertion into holes in assembled parts, for mating with a preformed internal thread and for tightening or releasing by torquing the head. The threaded and unthreaded portions are both of the same nominal diameter of 0.190 inch (5 mm) or larger. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. The thread length being the controlled dimension, the grip length is not specified. A locking feature may be incorporated in the design of the head or threads. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. Excludes:bolt,machine; bolt,externally relieved body; bolt,internal wrenching; and screw,cap,socket head.

INC FIIG Concept Condition
18257 A003B0 - 1
Specifications
Thread Class
2a
Details A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
Thread Direction
right-hand
Details 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.
Thread Length
1.250 inches minimum
Details A measurement of the extent of threads,including incomplete threads,along a line parallel to the longitudinal axis.
Fastener Length
2.000 inches nominal
Details 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.
Head Style
hexagon
Details The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
Head Height
0.302 inches minimum and 0.323 inches maximum
Details A measurement from the bottom to the top of the head,in distinction from depth.
Width Between Flats
0.736 inches minimum and 0.750 inches maximum
Details None.
Nominal Thread Diameter
0.500 inches
Details The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.
Thread Quantity Per Inch
20
Details The number of threads on the item per linear inch measured on a line parallel to the thread axis.
Minimum Tensile Strength
74000 pounds per square inch
Details The maximum rated load in tension applied in a longitudinal direction,per unit of cross-sectional area,that the material can withstand without rupture.
Hardness Rating
80.0 rockwell b minimum overall and 100.0 rockwell b maximum overall
Details A numeric value that reflects the hardness of an item when used in conjunction with a hardness rating scale.
Surface Finish
125.0 microinches grip
Details Designates the specific surface roughness rating,representing the arithmetic average deviation of the surface from the meanline in profile.
Surface Finish
125.0 microinches bearing surface of head
Details Designates the specific surface roughness rating,representing the arithmetic average deviation of the surface from the meanline in profile.
Surface Finish
63.0 microinches threads
Details Designates the specific surface roughness rating,representing the arithmetic average deviation of the surface from the meanline in profile.
Material
steel overall
Details The chemical compound or mechanical mixture properties of which the item is fabricated.
Material Document And Classification
sae gr 2 assn std single material response overall
Details The specification, standard, or manufacturer's reference and the classification designation, such as class, condition, temper, and the like, that identifies the material.
Thread Series Designator
unf
Details A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.
Nondefinitive Spec/Std Data
2 type and 10p style and 2 grade
Details The number,letter,or symbol that indicates the type,style,grade,class,and the like,of an item in a nonidentifying specification or standard.
Master-Cross Reference List
Part CAGE DAC HCC RNCC RNVC MSDS RNAAC
85180 34623 X - 3 2 - XX
100054 23705 X - 5 9 - XX
100054 24617 X - 5 9 - XX
100054 7X677 5 - 3 2 - ZZ
85180 08683 X - 5 9 - XX
FG1128 70691 X - 5 9 - XX
Material and Special Handling
Hazardous material, precious metals, criticality, and electrostatic discharge indicators.
HMIC PMIC ESD/EMI Criticality
N U - -
Freight
Universal / National Freight and Handling Information
UFC HMC LTL LCL
50600 - Q -
RVC WCC TCC SHC
- 713 Z 9

Certified Supplier

Order with confidence. We are a valued certified supplier serving customers in the military and aerospace industries.

  • ISO9001 / AS9100 Quality Standards
  • HAZMAT Certified
  • On Time Delivery
  • Qualified sales team
  • Counterfeit Parts Prevention
  • 100% Product Inspections
Manufacturer
FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC
CAGE: 81348
NATL INSTITUTE STDS & TECH , MD , 20899
UNITED STATES
View Products
FAQs
Frequently asked questions for NSN 5305-00-266-6374
What is the NIIN of the NSN 5305-00-266-6374?
The National Item Identification Number (NIIN) of the NSN 5305-00-266-6374 is 00-266-6374
When the NSN 5305-00-266-6374 was assigned to the Federal Catalog?
It was assigned 63 years ago, on Sun, Jan 1, 1961
Does the NSN 5305-00-266-6374 contain any precious metals?
Type/content is unknown
Does the NSN 5305-00-266-6374 contain any hazardous material?
No data in HMIRS

Can't Find It

If you didn't find what you need, don't worry, we're here to help! Our team is ready to help you find exactly what you need. Click below to contact us.

Similar Products
Who we are?

We are dedicated suppliers of aircraft ground servicing equipment, shop supplies, adhesives, chemicals, hardware, and a wide range of other essential consumables.

Contact
841 Prudential Drive
Jacksonville, FL, 32207
United States
© 2024 Aerospace Supplies, Inc. All rights reserved.
Made in USA