121557-3-A4P Close Tolerance Screw
5305-01-053-6496
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Official Item Classification
- Name
- Close Tolerance Screw
- Part Number
- 121557-3-A4P
- (NSN) National Stock Number
- 5305-01-053-6496
- (FSG) Federal Supply Group
- 53 Hardware and Abrasives
- (FSC) Federal Supply Classification
- 5305 Screws
- (INC) Item Name Code
- 29294
- (FIIG) Federal Item Identification Guide
- A003B0
- Date
- 01/08/1978 (48 years ago)
0.298 inches minimum and 0.348 inches maximum thread length, 3a thread class, flat countersunk head style, right-hand thread direction, 0.558 inches minimum and 0.588 inches maximum fastener length
Specs & Compatibility
3a
right-hand
0.298 inches minimum and 0.348 inches maximum
0.558 inches minimum and 0.588 inches maximum
flat countersunk
0.325 inches minimum and 0.385 inches maximum
0.1885 inches minimum and 0.1895 inches maximum
offset cruciform (torque set)
0.190 inches
0.240 inches minimum and 0.260 inches maximum
32
220000 pounds per square inch
46.0 rockwell c minimum and 49.0 rockwell c maximum overall
99.0 degrees minimum and 101.0 degrees maximum
steel comp h11 overall
ams 6487 assn std single material response overall
cadmium overall
nas 672 assn std single treatment response overall
unjf
Regulatory Compliance
Precious metal content is unknown
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.
0029294
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