NSN 5310-01-486-5939 · NIIN 014865939 · Part number 122-6776881 PC 21
Naval Sea Systems Command · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 53711
Government record, cited
NSN 5310-01-486-5939 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-486-5939. Manufacturer of record part number: 122-6776881 PC 21.
Also searched as5310-01-486-5939 ·
5310014865939 ·
NIIN 014865939 ·
01-486-5939 ·
FSC 5310 Nuts and Washers · CAGE 53711 · 122-6776881 PC 21 · 6776881
Material Document and Classification: QQ-B-637,ALY-464 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Cross-Sectional Shape Style: RECTANGULAR
Peripheral Shape Style: ROUND
Material: COPPER ALLOY 464 OVERALL
Center Hole Shape Style: ROUND
Hole Diameter: 0.812 INCHES NOMINAL IN
Identification
NSN: 5310-01-486-5939
NIIN: 014865939
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: 122-6776881 PC 21
Manufacturer: Naval Sea Systems Command
General Description
The Washer,flat, cataloged under National Stock Number 5310-01-486-5939, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
5310-01-486-5939
Primary Part Number
122-6776881 PC 21
Item Name
Washer,flat
FSC / FSG
5310 / 53 — Nuts and Washers
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Overall Diameter
2.000 INCHES NOMINAL IN
Material Document and Classification
QQ-B-637,ALY-464 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Cross-Sectional Shape Style
RECTANGULAR
Peripheral Shape Style
ROUND
Material
COPPER ALLOY 464 OVERALL
Center Hole Shape Style
ROUND
Hole Diameter
0.812 INCHES NOMINAL IN
Thickness
0.125 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items7
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
3040-01-487-2251122-6776881 PC 18POSSIBLE MATCH
BELL CRANK
Possible match (shared part number)Naval Sea Systems Command
3040-01-487-2252122-6776881 PC 17POSSIBLE MATCH
BELL CRANK
Possible match (shared part number)Naval Sea Systems Command
3040-01-487-2269122-6776881 PC 14POSSIBLE MATCH
BELL CRANK
Possible match (shared part number)Naval Sea Systems Command
5340-01-488-4800122-6776881 PC 39POSSIBLE MATCH
CLEVIS,ROD END
Possible match (shared part number)Naval Sea Systems Command
5340-01-488-4873122-6776881 PC 44POSSIBLE MATCH
CONNECTOR,ROD END
Possible match (shared part number)Naval Sea Systems Command
5340-01-488-5706122-6776881PC8POSSIBLE MATCH
ROD,STRAIGHT,HEADLESS
Possible match (shared part number)Naval Sea Systems Command
5340-01-488-8677122-6776881PC34POSSIBLE MATCH
CLEVIS,ROD END
Possible match (shared part number)Naval Sea Systems Command
NSN 5310-01-486-5939 is a Washer,flat, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
What part numbers are listed for NSN 5310-01-486-5939?
NSN 5310-01-486-5939 has 1 manufacturer part number on file: 122-6776881 PC 21 (Naval Sea Systems Command).
What NSN replaces 5310-01-486-5939?
7 possible matches (shared part number, not a government interchangeability claim): 3040-01-487-2251, 3040-01-487-2252, 3040-01-487-2269. Verify interchangeability with system specifications before substitution.
What are the specifications of 122-6776881 PC 21?
Key specifications for 122-6776881 PC 21: Overall Diameter: 2.000 INCHES NOMINAL IN; Material Document and Classification: QQ-B-637,ALY-464 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND. 8 specifications are documented in the U.S. Government catalog.
Is NSN 5310-01-486-5939 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.