Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
Style Designator: FLAT INTERNAL TEETH
Outside Diameter: 0.594 INCHES NOMINAL IN
Material Thickness: 0.030 INCHES NOMINAL IN
Nondefinitive Spec/std Data: A TYPE AND 1 GRADE AND 1 DESIGN AND 1 FIGURE
Material: STEEL COMP 1050 OR STEEL COMP 1551 OR STEEL COMP 1552 OR STEEL COMP 1053 OR STEEL COMP 1054 OR STEEL COMP 1055 OR STEEL COMP 1059 OR STEEL COMP 1060 OR STEEL COMP 1561 OR STEEL COMP 1064 OVERALL
Hole Diameter: 0.318 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN
Identification
NSN: 5310-00-515-9940
NIIN: 005159940
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
General Description
The Washer,lock, cataloged under National Stock Number 5310-00-515-9940, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government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
5310-00-515-9940
Item Name
Washer,lock
FSC / FSG
5310 / 53 — Nuts and Washers
Status
ACTIVE
Hardness Rating
40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
Style Designator
FLAT INTERNAL TEETH
Outside Diameter
0.594 INCHES NOMINAL IN
Material Thickness
0.030 INCHES NOMINAL IN
Nondefinitive Spec/std Data
A TYPE AND 1 GRADE AND 1 DESIGN AND 1 FIGURE
Material
STEEL COMP 1050 OR STEEL COMP 1551 OR STEEL COMP 1552 OR STEEL COMP 1053 OR STEEL COMP 1054 OR STEEL COMP 1055 OR STEEL COMP 1059 OR STEEL COMP 1060 OR STEEL COMP 1561 OR STEEL COMP 1064 OVERALL
Hole Diameter
0.318 INCHES MINIMUM AND 0.333 INCHES MAXIMUM 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 Items6
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5310-00-515-9948POSSIBLE MATCH
WASHER,LOCK
Possible match (shared part number)
6610-00-759-031510424POSSIBLE MATCH
BRACKET,ANGLE,MOTOR
Possible match (shared part number)Ni Industries Inc Thermador/waste King Div
5306-00-824-0965POSSIBLE MATCH
BOLT,U
Possible match (shared part number)
5950-00-842-443110424POSSIBLE MATCH
TRANSFORMER,POWER
Possible match (shared part number)Magnetek Inc Lighting Products Group
3010-01-459-216010424POSSIBLE MATCH
COUPLING HALF,SHAFT
Possible match (shared part number)Ldi Industries, Inc. Dba Ldi Industries Inc
5330-01-723-193010424POSSIBLE MATCH
GASKET
Possible match (shared part number)Gatr Technologies, Inc.
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
10424
3/9Design control — primary reference
U.S. Government activity
FFW00100TYPEAGRADE1DESIGN1
4/1Identification reference
U.S. Government activity
Related Parts
5310-00-515-9948POSSIBLE MATCH
WASHER,LOCK
6610-00-759-0315POSSIBLE MATCH
BRACKET,ANGLE,MOTOR
10424
5306-00-824-0965POSSIBLE MATCH
BOLT,U
5950-00-842-4431POSSIBLE MATCH
TRANSFORMER,POWER
10424
3010-01-459-2160POSSIBLE MATCH
COUPLING HALF,SHAFT
10424
5330-01-723-1930POSSIBLE MATCH
GASKET
10424
Frequently Asked Questions
What is NSN 5310-00-515-9940?
NSN 5310-00-515-9940 is a Washer,lock, classified under FSC 5310, Nuts and Washers. Status: active.
What NSN replaces 5310-00-515-9940?
6 possible matches (shared part number, not a government interchangeability claim): 5310-00-515-9948, 6610-00-759-0315, 5306-00-824-0965. Verify interchangeability with system specifications before substitution.
What are the specifications of 5310-00-515-9940?
Key specifications for 5310-00-515-9940: Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM; Style Designator: FLAT INTERNAL TEETH; Outside Diameter: 0.594 INCHES NOMINAL IN; Material Thickness: 0.030 INCHES NOMINAL IN. 7 specifications are documented in the U.S. Government catalog.
Is NSN 5310-00-515-9940 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.