Hardness Rating: 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
Outside Diameter: 2.500 INCHES NOMINAL IN
External Key Quantity: 6
External Prebent Key Width: 0.240 INCHES NOMINAL IN
Material: STEEL OVERALL
Identification
NSN: 5310-00-008-4549
NIIN: 000084549
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
General Description
The Washer,key, cataloged under National Stock Number 5310-00-008-4549, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
5310-00-008-4549
Item Name
Washer,key
FSC / FSG
5310 / 53 — Nuts and Washers
Status
ACTIVE
Hardness Rating
34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
Outside Diameter
2.500 INCHES NOMINAL IN
External Key Quantity
6
External Prebent Key Width
0.240 INCHES NOMINAL IN
Material
STEEL OVERALL
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
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
SL61W12
3/2Design control — primary reference
U.S. Government activity
No interchangeability data on file.
Other items in FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040
5310-00-000-0040 · Item name not on file
5310-00-000-0077
NUT,PLAIN,ROUND
5310-00-000-0079
WASHER,FLAT
5310-00-000-0079
WASHER,FLAT
5310-00-000-1146
5310-00-000-1146 · Item name not on file
5310-00-000-3815
5310-00-000-3815 · Item name not on file
5310-00-000-4532
5310-00-000-4532 · Item name not on file
5310-00-000-4540
5310-00-000-4540 · Item name not on file
Frequently Asked Questions
What is NSN 5310-00-008-4549?
NSN 5310-00-008-4549 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
What are the specifications of 5310-00-008-4549?
Key specifications for 5310-00-008-4549: Hardness Rating: 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM; Outside Diameter: 2.500 INCHES NOMINAL IN; External Key Quantity: 6; Special Features: CENTER HOLE CIRCUMFERENCE SERRATED. 5 specifications are documented in the U.S. Government catalog.
Is NSN 5310-00-008-4549 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.