The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-666-6037, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government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.
Catalog Facts
Item Name
Nut,plain,hexagon
FSC / FSG
5310 — Nuts and Washers (FSG 53)
Technical Specifications
Parameter
Value
NSN
5310-01-666-6037
Item Name
Nut,plain,hexagon
FSC / FSG
5310 / 53 — Nuts and Washers
Status
ACTIVE
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.
4720-01-666-6949MC240004-20POSSIBLE MATCH
HOSE,PREFORMED
Possible match (shared part number)The Boeing Company Div Defense
4730-01-666-6954MC240004-9POSSIBLE MATCH
CLAMP,HOSE
Possible match (shared part number)The Boeing Company Div Defense
5305-01-666-7312MC240004-31POSSIBLE MATCH
SCREW,MACHINE
Possible match (shared part number)The Boeing Company Div Defense
5305-01-666-7424MC240004-10POSSIBLE MATCH
SCREW,MACHINE
Possible match (shared part number)The Boeing Company Div Defense
5365-01-666-7452MC240004-33POSSIBLE MATCH
PLUG,MACHINE THREAD
Possible match (shared part number)The Boeing Company Div Defense
4720-01-666-7471MC240004-21POSSIBLE MATCH
HOSE,NONMETALLIC
Possible match (shared part number)The Boeing Company Div Defense
5310-01-666-7787MC240004-12POSSIBLE MATCH
WASHER,FLAT
Possible match (shared part number)The Boeing Company Div Defense
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
MC240004-11
3/2Design control — primary reference
U.S. Government activity
MC240004
D/9Drawing number reference only
U.S. Government activity
Related Parts
4720-01-666-6949POSSIBLE MATCH
HOSE,PREFORMED
MC240004-20
4730-01-666-6954POSSIBLE MATCH
CLAMP,HOSE
MC240004-9
5305-01-666-7312POSSIBLE MATCH
SCREW,MACHINE
MC240004-31
5305-01-666-7424POSSIBLE MATCH
SCREW,MACHINE
MC240004-10
5365-01-666-7452POSSIBLE MATCH
PLUG,MACHINE THREAD
MC240004-33
4720-01-666-7471POSSIBLE MATCH
HOSE,NONMETALLIC
MC240004-21
5310-01-666-7787POSSIBLE MATCH
WASHER,FLAT
MC240004-12
Frequently Asked Questions
What is NSN 5310-01-666-6037?
NSN 5310-01-666-6037 is a Nut,plain,hexagon, classified under FSC 5310, Nuts and Washers. Status: active.
What NSN replaces 5310-01-666-6037?
7 possible matches (shared part number, not a government interchangeability claim): 4720-01-666-6949, 4730-01-666-6954, 5305-01-666-7312. Verify interchangeability with system specifications before substitution.
Is NSN 5310-01-666-6037 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.