NSN 5310-01-657-1770 · NIIN 016571770 · Part number 1EAK7
W.w. Grainger, Inc. Div Government Sales Division · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 25795
Government record, cited
NSN 5310-01-657-1770 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-657-1770. Manufacturer of record part number: 1EAK7.
Also searched as5310-01-657-1770 ·
5310016571770 ·
NIIN 016571770 ·
01-657-1770 ·
FSC 5310 Nuts and Washers · CAGE 25795 · 1EAK7
Material Thickness: 0.022 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN
External Key Quantity: 12
Color: SILVER OVERALL
Material: STEEL COMP 410 OVERALL
Hole Diameter: 0.256 INCHES NOMINAL IN
Identification
NSN: 5310-01-657-1770
NIIN: 016571770
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: 1EAK7
Manufacturer: W.w. Grainger, Inc. Div Government Sales Division
General Description
The Washer,lock, cataloged under National Stock Number 5310-01-657-1770, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is W.w. Grainger, Inc. Div Government Sales Division. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
W.w. Grainger, Inc. Div Government Sales Division (USA)
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 5310-01-657-1770?
NSN 5310-01-657-1770 is a Washer,lock, manufactured by W.w. Grainger, Inc. Div Government Sales Division, classified under FSC 5310, Nuts and Washers. Status: active.
What part numbers are listed for NSN 5310-01-657-1770?
NSN 5310-01-657-1770 has 1 manufacturer part number on file: 1EAK7 (W.w. Grainger, Inc. Div Government Sales Division).
What are the specifications of 1EAK7?
Key specifications for 1EAK7: Style Designator: COUNTERSINK EXTERNAL TEETH; Outside Diameter: 0.478 INCHES NOMINAL IN; Material Thickness: 0.022 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN; External Key Quantity: 12. 7 specifications are documented in the U.S. Government catalog.
Is NSN 5310-01-657-1770 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.