The Washer,flat, cataloged under National Stock Number 5310-01-005-3198, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-005-3198 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Overall Diameter | 0.4915 INCHES MINIMUM AND 0.5035 INCHES MAXIMUM IN |
| Special Test Features | SPECIAL QUALITY CONTR0L TESTING |
| Material Document and Classification | ASTM A621 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A622 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A620 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A569 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Nondefinitive Spec/std Data | A TYPE AND 1 GRADE AND A CLASS |
| Peripheral Shape Style | ROUND |
| Test Data Document | 81349-MIL-P-23199 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.2625 INCHES MINIMUM AND 0.2745 INCHES MAXIMUM IN |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY MATERIAL WHICH MUST BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| Thickness | 0.036 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Reference | Meaning |
|---|---|
| FF-W-92 | 4/1 Identification reference U.S. Government activity |
| 109A541H06 | 3/1 Design control — primary reference Curtiss-Wright Electro-Mechanical Corporation Div Curtiss-Wright Emd |
NSN 5310-01-005-3198 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-005-3198: Overall Diameter: 0.4915 INCHES MINIMUM AND 0.5035 INCHES MAXIMUM IN; Special Test Features: SPECIAL QUALITY CONTR0L TESTING; Material Document and Classification: ASTM A621 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A622 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A620 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A569 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 12 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.