5305-01-253-2999
Hexagon Head Cap Screw
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Official Item Classification
- Name
- Hexagon Head Cap Screw
- (NSN) National Stock Number
- 5305-01-253-2999
- (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
- 04/16/1987 (39 years ago)
hexagon head style, 2.906 inches minimum and 3.000 inches maximum fastener length, 1.250 inches minimum and 1.442 inches maximum thread length, 2a thread class, right-hand thread direction
Specs & Compatibility
2a
right-hand
1.250 inches minimum and 1.442 inches maximum
2.906 inches minimum and 3.000 inches maximum
hexagon
0.302 inches minimum and 0.323 inches maximum
0.736 inches minimum and 0.750 inches maximum
0.092 inches minimum and 0.100 inches maximum
0.500 inches
1
drilled
13
150000 pounds per square inch
32.0 rockwell c minimum and 38.0 rockwell c maximum overall
hexagon flats
63.0 microinches threads
steel overall
astm a354, grade bd assn std single material response overall
zinc and chromate overall
astm b633 ty 2 sc 3 assn std single treatment response overall
unc
Regulatory Compliance
Item does not contain precious metal.
The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
0018257
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