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5305-01-277-0422

Hexagon Head Cap Screw

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Official Item Classification

Name
Hexagon Head Cap Screw
(NSN) National Stock Number
5305-01-277-0422
(FSG) Federal Supply Group
53 Hardware and Abrasives
(FSC) Federal Supply Classification
5305 Screws
(INC) Item Name Code
18257
(FIIG) Federal Item Identification Guide
A003B0
Date
04/16/1988 (38 years ago)

2.543 inches minimum and 2.750 inches maximum thread length, 3.562 inches minimum and 3.750 inches maximum fastener length, 2a thread class, right-hand thread direction, hexagon head style

Specs & Compatibility

Thread Class

2a

Thread Direction

right-hand

Thread Length

2.543 inches minimum and 2.750 inches maximum

Fastener Length

3.562 inches minimum and 3.750 inches maximum

Head Style

hexagon

Head Height

0.749 inches minimum and 0.813 inches maximum

Width Between Flats

1.812 inches minimum and 1.875 inches maximum

Nominal Thread Diameter

1.250 inches

Thread Quantity Per Inch

12

Minimum Tensile Strength

150000 pounds per square inch

Hardness Rating

32.0 rockwell c minimum and 38.0 rockwell c maximum overall

Surface Finish

63.0 microinches threads

Material

steel overall

Material Document And Classification

sae j429 grade 8 assn std single material response overall

Surface Treatment

zinc and chromate overall

Surface Treatment Document And Classification

astm b633 ty 2 sc 3 assn std single treatment response overall

Thread Series Designator

unf

Nondefinitive Spec/Std Data

2 type and 10p style and 8 grade

Replacement For

Part Number Description
5305-01-087-8793 No Name Available 09/13/2005

Regulatory Compliance

Precious Metals Indicator
A

Item does not contain precious metal.

Criticality Code
X

The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Hazardous Metals Indicator
N

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

Pseudo Item Name Code

0018257

Related Hardware Products

Part Number Description
B1821BH125F375N Hexagon Head Cap Screw
MS90726-276 Hexagon Head Cap Screw
MS90727-276 Hexagon Head Cap Screw

Frequently Asked Questions

What is the FSCG of the NSN 5305-01-277-0422?
The FSCG of the NSN 5305-01-277-0422 is 5305
Does the NSN 5305-01-277-0422 have a Schedule B code assigned?
Yes, the Schedule B code is 7318152000
Does NSN 5305-01-277-0422 require demilitarization?
Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.
Does NSN 5305-01-277-0422 contain precious materials?
Item does not contain precious metal.
Does NSN 5305-01-277-0422 contain hazardous materials?
Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
When the NSN 5305-01-277-0422 was assigned to the Federal Catalog?
It was assigned 38 years ago, on Sat, Apr 16, 1988