12387327-28: WASHER,FLAT.
The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4130 OR STEEL COMP 4140 OR STEEL COMP 8640 OR STEEL COMP 8740 OVERALL, thickness: 0.202 INCHES MINIMUM AND 0.216 INCHES MAXIMUM IN, hole_diameter: 0.521 INCHES MINIMUM AND 0.541 INCHES MAXIMUM IN, hardness_rating: 33.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM, overall_diameter: 1.990 INCHES MINIMUM AND 2.010 INCHES MAXIMUM IN, surface_treatment: ZINC OVERALL. This part is cataloged in the U.S.
Government catalog under NSN 5310-01-566-9850, 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 | STEEL COMP 4130 OR STEEL COMP 4140 OR STEEL COMP 8640 OR STEEL COMP 8740 OVERALL |
| thickness | 0.202 INCHES MINIMUM AND 0.216 INCHES MAXIMUM IN |
| hole_diameter | 0.521 INCHES MINIMUM AND 0.541 INCHES MAXIMUM IN |
| hardness_rating | 33.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM |
| overall_diameter | 1.990 INCHES MINIMUM AND 2.010 INCHES MAXIMUM IN |
| surface_treatment | ZINC OVERALL |
| peripheral_shape_style | ROUND |
| center_hole_shape_style | ROUND |
| end_item_identification | MRAP - UNIQUE NSN - USED ON 2 MRAP VARIANTS; MULTIPLE LAUNCH ROCKET SYSTEM (MLRS) |
| cross-sectional_shape_style | RECTANGULAR |
| surface_treatment_document_and_classification | MIL-STD-171, 1.9.2.2 MIL STD SINGLE TREATMENT RESPONSE AND ASTM B633, TY II, CL 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| NSN | 5310-01-566-9850 |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-STD-171, 1.9.2.2 MIL STD SINGLE TREATMENT RESPONSE AND ASTM B633, TY II, CL 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| OVERALL DIAMETER | 1.990 INCHES MINIMUM AND 2.010 INCHES MAXIMUM IN |
| HARDNESS RATING | 33.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | A829 ASSN STD 1ST MATERIAL RESPONSE OR A322 ASSN STD 1ST MATERIAL RESPONSE OR A331 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6350 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6351 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6345 ASSN STD 1ST MATERIAL RESPONSE OR A829 ASSN STD 2ND MATERIAL RESPONSE OR A322 ASSN STD 2ND MATERIAL RESPONSE OR A331 ASSN STD 2ND MATERIAL RESPONSE OR A829 ASSN STD 3RD MATERIAL RESPONSE OR A322 ASSN STD 3RD MATERIAL RESPONSE OR A331 ASSN STD 3RD MATERIAL RESPONSE OR A322 ASSN STD 4TH MATERIAL RESPONSE OR A331 ASSN STD 4TH MATERIAL RESPONSE OVERALL |
| CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR |
| SURFACE TREATMENT | ZINC OVERALL |
| PERIPHERAL SHAPE STYLE | ROUND |
| END ITEM IDENTIFICATION | MRAP - UNIQUE NSN - USED ON 2 MRAP VARIANTS; MULTIPLE LAUNCH ROCKET SYSTEM (MLRS) |
| MATERIAL | STEEL COMP 4130 OR STEEL COMP 4140 OR STEEL COMP 8640 OR STEEL COMP 8740 OVERALL |
| CENTER HOLE SHAPE STYLE | ROUND |