The Washer,lock, cataloged under National Stock Number 5310-00-939-1063, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5310-00-939-1063 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | CANCELLED |
| Hardness Rating | 89.0 ROCKWELL B MINIMUM AND 94.0 ROCKWELL B MAXIMUM |
| Style Designator | FLAT EXTERNAL TEETH |
| Material Document and Classification | QQ-B-750,COMP A FED SPEC 1ST MATERIAL RESPONSE OR CDA ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.245 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Material Thickness | 0.015 INCHES MINIMUM AND 0.019 INCHES MAXIMUM IN |
| Nondefinitive Spec/std Data | 2 TYPE AND 1 STYLE AND A GRADE AND 3 OR 4 COMPOSITION |
| Material | COPPER ALLOY OR COPPER ALLOY 425 OVERALL |
| Hole Diameter | 0.115 INCHES MINIMUM AND 0.123 INCHES MAXIMUM IN |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 300-2126 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 2151200108 | E/8 Replaced / superseded reference Navcom Defense Electronics, Inc. |
| AN936B4B | 5/9 Secondary reference U.S. Government activity |
| MS35335-85 | 2/2 Government specification standardization U.S. Government activity |
| MS35335-71 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 373-7010-000 | C/1 Advisory reference — outside the item-of-supply concept Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| 5310009391063 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
NSN 5310-00-939-1063 is a Washer,lock, classified under FSC 5310, Nuts and Washers. Status: cancelled.
2 possible matches (shared part number, not a government interchangeability claim): 7050-01-174-8725, 5310-01-201-8699. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-00-939-1063: Hardness Rating: 89.0 ROCKWELL B MINIMUM AND 94.0 ROCKWELL B MAXIMUM; Style Designator: FLAT EXTERNAL TEETH; Material Document and Classification: QQ-B-750,COMP A FED SPEC 1ST MATERIAL RESPONSE OR CDA ASSN STD 2ND MATERIAL RESPONSE OVERALL; Outside Diameter: 0.245 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN. 8 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.
NSN 5310-00-939-1063 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.