NSN 5310-01-481-2047 · NIIN 014812047 · Part number 123-1680562 PC 21
Naval Sea Systems Command · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 53711
Government record, cited
NSN 5310-01-481-2047 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-481-2047. Manufacturer of record part number: 123-1680562 PC 21.
Also searched as5310-01-481-2047 ·
5310014812047 ·
NIIN 014812047 ·
01-481-2047 ·
FSC 5310 Nuts and Washers · CAGE 53711 · 123-1680562 PC 21 · 1680561 · 123-1680561 PC 21
Material Document and Classification: MIL-B-994 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Cross-Sectional Shape Style: RECTANGULAR
Peripheral Shape Style: ROUND
Material: COPPER ALLOY OVERALL
Identification
NSN: 5310-01-481-2047
NIIN: 014812047
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: 123-1680562 PC 21
Manufacturer: Naval Sea Systems Command
General Description
The Washer,flat, cataloged under National Stock Number 5310-01-481-2047, 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 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 12 items share a part number with this NSN in the catalog (possible match — not a government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
5310-01-481-2047
Primary Part Number
123-1680562 PC 21
Item Name
Washer,flat
FSC / FSG
5310 / 53 — Nuts and Washers
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Surface Finish
125.0 MICROINCHES BOTTOM
Surface Finish
125.0 MICROINCHES TOP
Overall Diameter
1.250 INCHES NOMINAL IN
Material Document and Classification
MIL-B-994 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Cross-Sectional Shape Style
RECTANGULAR
Peripheral Shape Style
ROUND
Material
COPPER ALLOY OVERALL
Center Hole Shape Style
ROUND
Hole Diameter
0.781 INCHES NOMINAL IN
Thickness
0.109 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 Items12
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5310-01-481-2053123-1680562 PC 20POSSIBLE MATCH
WASHER,FLAT
Possible match (shared part number)Naval Sea Systems Command
3040-01-481-2268123-1680561 PC 41POSSIBLE MATCH
SHAFT,SHOULDERED
Possible match (shared part number)Naval Sea Systems Command
3040-01-481-2271123-1680561 PC 40POSSIBLE MATCH
SHAFT,SHOULDERED
Possible match (shared part number)Naval Sea Systems Command
3040-01-481-2274123-1680561 PC 39POSSIBLE MATCH
SHAFT,SHOULDERED
Possible match (shared part number)Naval Sea Systems Command
3040-01-481-2278123-1680561 PC 45POSSIBLE MATCH
SHAFT,SHOULDERED
Possible match (shared part number)Naval Sea Systems Command
3040-01-481-2282123-1680561 PC 52POSSIBLE MATCH
SHAFT,SHOULDERED
Possible match (shared part number)Naval Sea Systems Command
3040-01-481-2296123-1680561 PC 34POSSIBLE MATCH
SHAFT,SHOULDERED
Possible match (shared part number)Naval Sea Systems Command
5310-01-481-3832123-1680562 PC 16POSSIBLE MATCH
NUT,JACKSCREW
Possible match (shared part number)Naval Sea Systems Command
5310-01-481-3837123-1680562 PC 17POSSIBLE MATCH
NUT,JACKSCREW
Possible match (shared part number)Naval Sea Systems Command
3040-01-481-4542123-1680562 PC 38POSSIBLE MATCH
SHAFT,SHOULDERED
Possible match (shared part number)Naval Sea Systems Command
NSN 5310-01-481-2047 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 5310-01-481-2047?
NSN 5310-01-481-2047 has 2 manufacturer part numbers on file: 123-1680562 PC 21 (Naval Sea Systems Command), 123-1680561 PC 21 (Naval Sea Systems Command).
What NSN replaces 5310-01-481-2047?
12 possible matches (shared part number, not a government interchangeability claim): 5310-01-481-2053, 3040-01-481-2268, 3040-01-481-2271. Verify interchangeability with system specifications before substitution.
What are the specifications of 123-1680562 PC 21?
Key specifications for 123-1680562 PC 21: Surface Finish: 125.0 MICROINCHES BOTTOM; Surface Finish: 125.0 MICROINCHES TOP; Overall Diameter: 1.250 INCHES NOMINAL IN; Material Document and Classification: MIL-B-994 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 10 specifications are documented in the U.S. Government catalog.
Is NSN 5310-01-481-2047 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.