FN1216-1018: NUT,SELF-LOCKING,EXTENDED WASHER.
NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: IRON ALLOY 660 OVERALL, nut_style: DOUBLE HEXAGON, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), overall_height: 0.705 INCHES MAXIMUM IN, hardness_rating: 42.0 ROCKWELL C MAXIMUM. This part is cataloged in the U.S.
Government catalog under NSN 5310-01-082-5352, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.
Verify compatibility with your specific system configuration before ordering.
| material | IRON ALLOY 660 OVERALL |
| nut_style | DOUBLE HEXAGON |
| thread_class | 3B |
| thread_series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| overall_height | 0.705 INCHES MAXIMUM IN |
| hardness_rating | 42.0 ROCKWELL C MAXIMUM |
| locking_feature | PREVAILING TORQUE ALL METAL DESIGN |
| thread_direction | RIGHT-HAND |
| washer_thickness | 0.145 INCHES MINIMUM IN |
| precious_material | SILVER |
| surface_treatment | SILVER OVERALL |
| width_across_flats | 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN |
| NSN | 5310-01-082-5352 |
| OVERALL HEIGHT | 0.705 INCHES MAXIMUM IN |
| WASHER OUTSIDE DIAMETER | 0.910 INCHES MAXIMUM IN |
| WIDTH ACROSS FLATS | 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| THREAD SERIES | UNIFIED NATIONAL JOINT FINE (UNJF) |
| PRECIOUS MATERIAL | SILVER |
| HARDNESS RATING | 42.0 ROCKWELL C MAXIMUM |
| WASHER THICKNESS | 0.145 INCHES MINIMUM IN |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| THREAD DIRECTION | RIGHT-HAND |
No substitute or cross-reference records for this part.