NSN 5310-01-472-9318 · NIIN 014729318 · Part number 124-4735011 P/N 21
Naval Sea Systems Command · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 53711
Government record, cited
NSN 5310-01-472-9318 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-472-9318. Manufacturer of record part number: 124-4735011 P/N 21.
Hardness Rating: 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM
Material Document and Classification: AMS A-410,COMP 400,COND N ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Cross-Sectional Shape Style: RECTANGULAR
Peripheral Shape Style: ROUND
Identification
NSN: 5310-01-472-9318
NIIN: 014729318
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: 124-4735011 P/N 21
Manufacturer: Naval Sea Systems Command
General Description
The Washer,flat, cataloged under National Stock Number 5310-01-472-9318, 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 11 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government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
5310-01-472-9318
Primary Part Number
124-4735011 P/N 21
Item Name
Washer,flat
FSC / FSG
5310 / 53 — Nuts and Washers
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Surface Finish
63.0 MICROINCHES BOTTOM
Surface Finish
63.0 MICROINCHES TOP
Overall Diameter
4.000 INCHES NOMINAL IN
Hardness Rating
36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM
Material Document and Classification
AMS A-410,COMP 400,COND N ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Cross-Sectional Shape Style
RECTANGULAR
Peripheral Shape Style
ROUND
Material
STEEL OVERALL
Center Hole Shape Style
ROUND
Hole Diameter
1.765 INCHES NOMINAL IN
Thickness
0.188 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.
5310-01-473-0344124-4735013 P/N 10POSSIBLE MATCH
WASHER,FLAT
Possible match (shared part number)Naval Sea Systems Command
5310-01-476-7353122-2422339 PIECE 13POSSIBLE MATCH
WASHER,FLAT
Possible match (shared part number)Naval Ship Systems Command
3120-01-480-3783124-4735011 P/N 34POSSIBLE MATCH
BUSHING,SLEEVE
Possible match (shared part number)Naval Sea Systems Command
3120-01-480-4032124-4735011 P/N 72POSSIBLE MATCH
BUSHING,SLEEVE
Possible match (shared part number)Naval Sea Systems Command
5310-01-480-4747122-2422339 PIECE 11POSSIBLE MATCH
WASHER,FLAT
Possible match (shared part number)Naval Ship Systems Command
5310-01-480-4755122-2422339 PIECE 12POSSIBLE MATCH
WASHER,FLAT
Possible match (shared part number)Naval Ship Systems Command
5310-01-480-5370122-2422339 PIECE 48POSSIBLE MATCH
NUT,PLAIN,SLOTTED,HEXAGON
Possible match (shared part number)Naval Ship Systems Command
NSN 5310-01-472-9318 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 5310-01-472-9318?
NSN 5310-01-472-9318 has 1 manufacturer part number on file: 124-4735011 P/N 21 (Naval Sea Systems Command).
What NSN replaces 5310-01-472-9318?
7 possible matches (shared part number, not a government interchangeability claim): 5310-01-473-0344, 5310-01-476-7353, 3120-01-480-3783. Verify interchangeability with system specifications before substitution.
What are the specifications of 124-4735011 P/N 21?
Key specifications for 124-4735011 P/N 21: Surface Finish: 63.0 MICROINCHES BOTTOM; Surface Finish: 63.0 MICROINCHES TOP; Overall Diameter: 4.000 INCHES NOMINAL IN; Hardness Rating: 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM. 11 specifications are documented in the U.S. Government catalog.
Is NSN 5310-01-472-9318 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.