NSN 5310-01-398-0318 · NIIN 013980318 · Part number 8909-922-021
The Entwistle Company Llc · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 20722
Government record, cited
NSN 5310-01-398-0318 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-398-0318. Manufacturer of record part number: 8909-922-021.
Also searched as5310-01-398-0318 ·
5310013980318 ·
NIIN 013980318 ·
01-398-0318 ·
FSC 5310 Nuts and Washers · CAGE 20722 · 8909-922-021
Hardness Rating: 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
Cross-Sectional Shape Style: RECTANGULAR
Surface Treatment: ZINC OVERALL
Peripheral Shape Style: ROUND
Material: STEEL COMP 1035 OR STEEL COMP 1037 OR STEEL COMP 1038 OR STEEL COMP 1039 OR STEEL COMP 1040 OR STEEL COMP 1042 OR STEEL COMP 1043 OR STEEL COMP 1044 OR STEEL COMP 1045 OR STEEL COMP 1046 OR STEEL COMP 1049 OR STEEL COMP 1050 OR STEEL COMP 1053 OR STEEL COMP 1054 OR STEEL COMP 1055 OVERALL
Center Hole Shape Style: ROUND
Identification
NSN: 5310-01-398-0318
NIIN: 013980318
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: 8909-922-021
Manufacturer: The Entwistle Company Llc
General Description
The Washer,flat, cataloged under National Stock Number 5310-01-398-0318, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Entwistle Company Llc. Government technical data includes 9 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.
Technical Specifications
Parameter
Value
NSN
5310-01-398-0318
Primary Part Number
8909-922-021
Item Name
Washer,flat
FSC / FSG
5310 / 53 — Nuts and Washers
Manufacturer
The Entwistle Company Llc
Status
ACTIVE
Overall Diameter
0.688 INCHES NOMINAL IN
Hardness Rating
38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
Cross-Sectional Shape Style
RECTANGULAR
Surface Treatment
ZINC OVERALL
Peripheral Shape Style
ROUND
Material
STEEL COMP 1035 OR STEEL COMP 1037 OR STEEL COMP 1038 OR STEEL COMP 1039 OR STEEL COMP 1040 OR STEEL COMP 1042 OR STEEL COMP 1043 OR STEEL COMP 1044 OR STEEL COMP 1045 OR STEEL COMP 1046 OR STEEL COMP 1049 OR STEEL COMP 1050 OR STEEL COMP 1053 OR STEEL COMP 1054 OR STEEL COMP 1055 OVERALL
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 5310-01-398-0318?
NSN 5310-01-398-0318 is a Washer,flat, manufactured by The Entwistle Company Llc, classified under FSC 5310, Nuts and Washers. Status: active.
What part numbers are listed for NSN 5310-01-398-0318?
NSN 5310-01-398-0318 has 1 manufacturer part number on file: 8909-922-021 (The Entwistle Company Llc).
What are the specifications of 8909-922-021?
Key specifications for 8909-922-021: Overall Diameter: 0.688 INCHES NOMINAL IN; Hardness Rating: 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: ZINC OVERALL. 9 specifications are documented in the U.S. Government catalog.
Is NSN 5310-01-398-0318 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.