The Washer,flat, cataloged under National Stock Number 5310-01-243-5135, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-243-5135 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.223 INCHES MINIMUM AND 0.229 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-S-763 FED SPEC ALL MATERIAL RESPONSES AND QQ-S-766 FED SPEC ALL MATERIAL RESPONSES AND QQ-W-423 FED SPEC ALL MATERIAL RESPONSES AND MIL-S-5059 MIL SPEC ALL MATERIAL RESPONSES AND MIL-S-7720 MIL SPEC ALL MATERIAL RESPONSES AND ASTM-A-582 ASSN STD ALL MATERIAL RESPONSES OR AMS5640 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | PASSIVATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 304 OR STEEL COMP 304L OR STEEL COMP 305 OR STEEL COMP 309 OR STEEL COMP 310 OR STEEL COMP 316 OR STEEL COMP 316L OR STEEL COMP 317 OR STEEL COMP 321 OR STEEL COMP 347 OR STEEL COMP 348 OR STEEL COMP 303MA OR STEEL COMP 303PB OR STEEL COMP 303CU OR STEEL COMP 303 PLUS X OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.141 INCHES MINIMUM AND 0.147 INCHES MAXIMUM IN |
| Thickness | 0.028 INCHES MINIMUM AND 0.034 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 092-06131-144-2262 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-243-5135 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-243-5135: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.223 INCHES MINIMUM AND 0.229 INCHES MAXIMUM IN; Material Document and Classification: QQ-S-763 FED SPEC ALL MATERIAL RESPONSES AND QQ-S-766 FED SPEC ALL MATERIAL RESPONSES AND QQ-W-423 FED SPEC ALL MATERIAL RESPONSES AND MIL-S-5059 MIL SPEC ALL MATERIAL RESPONSES AND MIL-S-7720 MIL SPEC ALL MATERIAL RESPONSES AND ASTM-A-582 ASSN STD ALL MATERIAL RESPONSES OR AMS5640 ASSN STD ALL MATERIAL RESPONSES OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 10 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.