The Washer,lock, cataloged under National Stock Number 5310-01-684-2707, 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5310 (Nuts and Washers) of the Hardware and Abrasives group. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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
Washer,lock
FSC / FSG
5310 — Nuts and Washers (FSG 53)
Technical Specifications
Parameter
Value
NSN
5310-01-684-2707
Item Name
Washer,lock
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 Items3
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5310-01-685-09723001075-060HDPOSSIBLE MATCH
WASHER,LOCK
Possible match (shared part number)Bae Systems Land & Armaments L.p.
5310-01-690-41443001075-080POSSIBLE MATCH
WASHER,LOCK
Possible match (shared part number)Bae Systems Land & Armaments L.p.
5310-01-691-92523001075-100HDPOSSIBLE MATCH
WASHER,SPRING TENSION
Possible match (shared part number)Bae Systems Land & Armaments L.p.
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
3001075
D/9Drawing number reference only
U.S. Government activity
3001075-120
3/2Design control — primary reference
U.S. Government activity
Related Parts
5310-01-685-0972POSSIBLE MATCH
WASHER,LOCK
3001075-060HD
5310-01-690-4144POSSIBLE MATCH
WASHER,LOCK
3001075-080
5310-01-691-9252POSSIBLE MATCH
WASHER,SPRING TENSION
3001075-100HD
Frequently Asked Questions
What is NSN 5310-01-684-2707?
NSN 5310-01-684-2707 is a Washer,lock, classified under FSC 5310, Nuts and Washers. Status: active.
What NSN replaces 5310-01-684-2707?
3 possible matches (shared part number, not a government interchangeability claim): 5310-01-685-0972, 5310-01-690-4144, 5310-01-691-9252. Verify interchangeability with system specifications before substitution.
Is NSN 5310-01-684-2707 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.