Home » FSC Catalog » Screws » 5305-00-018-6631

Hexagon Head Cap Screw

SKU: 5305000186631 | Model: FFS85
NSN 5305-00-018-6631 NSN 5305-00-018-6631

2A thread class, right-hand , 1.250" thread length, 2.250" fastener length, hexagon head style, 0.302" head height, 0.736" width between flats

Specifications from the Manufacturer

Thread Class:
Thread Direction:
Thread Length:
1.250 inches minimum
Fastener Length:
2.250 inches nominal
Head Style:
Head Height:
0.302 inches minimum and 0.323 inches maximum
Width Between Flats:
0.736 inches minimum and 0.750 inches maximum
Nominal Thread Diameter:
0.500 inches
Thread Quantity Per Inch:
Minimum Tensile Strength:
150000 pounds per square inch
Hardness Rating:
32.0 rockwell c minimum overall and 38.0 rockwell c maximum overall
Surface Finish:
125.0 microinches grip
Surface Finish:
63.0 microinches threads
Steel overall
Material Document And Classification:
Sae gr 8 assn std single material response overall
Thread Series Designator:
Nondefinitive Spec/std Data:
2 type and 10p style and 8 grade

Pricing and Availability

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NSN 5305-00-018-6631 Datasheet

Supply Class:


Cross Reference:

  • FFS85

Cage Codes:

  • Federal Specifications (CAGE 81348)

Replaced or Cancelled:

5305-00-018-6631 is not a replacement of any national stock number and has not been cancelled or replaced itself.


NIIN: 000186631
NSN: 5305000186631
DEMIL Code Meaning: Non-usml/non-ccli - no demil or dod tsc required. department of commerce may impose licensing requirements to certain destinations.

Freight Codes:

NMF Desc: Bolts, Nuts Or Screws, Noi (sub 3)
NMFC: 093486
UFC: 48950
LTL: Rating variable
LCL: 50.0
WCC: Metal hardware
TCC: No special type of cargo code applicable
SHC: Other or no special handling required (sh)
ADC: Shipment is not a consolidation and does not exceed 84 inches in any dimension.
ACC: Construction materials: includes paint and related materials, prefabricated building, wood products, metal and composition mater
ASH: No special handling required.

Reference Drawing:

[drawing of 5305-00-018-6631]

Schedule B & Trade:

7318152000 (NAICS 332722)
Bolts and bolts and their nuts or washers exported in the same shipment

Screws, bolts, nuts, screw hooks, rivets, washers and similar articles, threaded, of iron or steel

End Use:

Iron and steel products, other

Questions & Answers:

What are the historical prices recorded for this stock number?
No pre-dated pricing for this NSN could be found.
Does NSN 5305-00-018-6631 have a shelf life?
No. There is no shelf life applicable for this NSN.
What NATO entities are users of this NSN?
No recorded entities for this stock number.
How is national stock number 5305-00-018-6631 defined?
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.
What is the NIIN of NSN 5305-00-018-6631?
000186631 or 00-018-6631
Does this item require Demilitarization?
Non-usml/non-ccli - no demil or dod tsc required. department of commerce may impose licensing requirements to certain destinations. (note 9).
Is NSN 5305000186631 ITAR controlled?
No. This item is not ITAR Controlled.
What is the most recent solicitation for NSN 5305000186631?
No solicitations for this NSN.
When was this national stock number assigned to the federal catalog?
Jan 01, 1963