Style Designator: FLAT EXTERNAL AND INTERNAL TEETH
Outside Diameter: 0.680 INCHES MINIMUM AND 0.695 INCHES MAXIMUM IN
Material Thickness: 0.035 INCHES NOMINAL IN
Material: STEEL OVERALL
Hole Diameter: 0.256 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN
Identification
NSN: 5310-00-261-7386
NIIN: 002617386
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
General Description
The Washer,lock, cataloged under National Stock Number 5310-00-261-7386, 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5 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government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
5310-00-261-7386
Item Name
Washer,lock
FSC / FSG
5310 / 53 — Nuts and Washers
Status
ACTIVE
Style Designator
FLAT EXTERNAL AND INTERNAL TEETH
Outside Diameter
0.680 INCHES MINIMUM AND 0.695 INCHES MAXIMUM IN
Material Thickness
0.035 INCHES NOMINAL IN
Material
STEEL OVERALL
Hole Diameter
0.256 INCHES MINIMUM AND 0.267 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.
2530-00-558-5827POSSIBLE MATCH
BRACKET
Possible match (shared part number)
5306-00-590-3246POSSIBLE MATCH
BOLT,MACHINE
Possible match (shared part number)
2915-00-627-9760POSSIBLE MATCH
PIN,PRESSURE,FUEL SYSTEM
Possible match (shared part number)
4730-01-194-6815401/420POSSIBLE MATCH
TEE,PIPE
Possible match (shared part number)George Fischer Sloane, Inc.
6150-01-499-12903151618POSSIBLE MATCH
CABLE ASSEMBLY,RIBBON,ELECTRICAL
Possible match (shared part number)Dh Instruments Inc.
4730-01-632-2992401-420POSSIBLE MATCH
REDUCER,PIPE
Possible match (shared part number)Tieco Inc
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
4014-20
5/9Secondary reference
Itw Shakeproof Automotive Products
6L72214-20
3/2Design control — primary reference
U.S. Government activity
Related Parts
2530-00-558-5827POSSIBLE MATCH
BRACKET
5306-00-590-3246POSSIBLE MATCH
BOLT,MACHINE
2915-00-627-9760POSSIBLE MATCH
PIN,PRESSURE,FUEL SYSTEM
4730-01-194-6815POSSIBLE MATCH
TEE,PIPE
401/420
6150-01-499-1290POSSIBLE MATCH
CABLE ASSEMBLY,RIBBON,ELECTRICAL
3151618
4730-01-632-2992POSSIBLE MATCH
REDUCER,PIPE
401-420
Frequently Asked Questions
What is NSN 5310-00-261-7386?
NSN 5310-00-261-7386 is a Washer,lock, classified under FSC 5310, Nuts and Washers. Status: active.
What NSN replaces 5310-00-261-7386?
6 possible matches (shared part number, not a government interchangeability claim): 2530-00-558-5827, 5306-00-590-3246, 2915-00-627-9760. Verify interchangeability with system specifications before substitution.
What are the specifications of 5310-00-261-7386?
Key specifications for 5310-00-261-7386: Style Designator: FLAT EXTERNAL AND INTERNAL TEETH; Outside Diameter: 0.680 INCHES MINIMUM AND 0.695 INCHES MAXIMUM IN; Material Thickness: 0.035 INCHES NOMINAL IN; Material: STEEL OVERALL. 5 specifications are documented in the U.S. Government catalog.
Is NSN 5310-00-261-7386 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.