The Washer,flat, cataloged under National Stock Number 5310-00-952-0309, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-952-0309 |
| Primary Part Number | 310-0740-640 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| Status | CANCELLED |
| Overall Diameter | 0.463 INCHES MINIMUM AND 0.483 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-S-766 FED SPEC 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 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.255 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN |
| Thickness | 0.063 INCHES NOMINAL IN |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| NAS620C416 | The Boeing Company Div Services (USA) |
| 310-0740-640 PRIMARY | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA) |
| 143600416 | Elac Sonar Gmbh (DEU) |
| Reference | Meaning |
|---|---|
| 5310PL0738240 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| NAS620C416 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 418154-64 | 5/2 Secondary reference U.S. Government activity |
| 5310PL1370133 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 816445-153 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| NAS620C416 | 3/2 Design control — primary reference U.S. Government activity |
| 9336C2008-16 | 5/9 Secondary reference U.S. Government activity |
| 5310009520309 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 9336C2008-16 | 5/2 Secondary reference U.S. Government activity |
| 10121877 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5310-00-952-0309 is a Washer,flat, manufactured by Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems, classified under FSC 5310, Nuts and Washers. Status: cancelled.
NSN 5310-00-952-0309 has 3 manufacturer part numbers on file: NAS620C416 (The Boeing Company Div Services), 310-0740-640 (Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems), 143600416 (Elac Sonar Gmbh).
3 possible matches (shared part number, not a government interchangeability claim): 5310-01-064-1494, 5310-01-497-3994, 5310-01-689-3468. Verify interchangeability with system specifications before substitution.
Key specifications for 310-0740-640: Overall Diameter: 0.463 INCHES MINIMUM AND 0.483 INCHES MAXIMUM IN; Material Document and Classification: QQ-S-766 FED SPEC ALL MATERIAL RESPONSES OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: PASSIVATE OVERALL. 9 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 5310-00-952-0309 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.