Washer, Flat5310-01-523-9101

NSN 5310-01-523-9101 · NIIN 015239101

FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives

Government record, cited

Also searched as 5310-01-523-9101 · 5310015239101 · NIIN 015239101 · 01-523-9101 · FSC 5310 Nuts and Washers · NAS1515K08L · NAS1515K08L

Nearby stock numbers ← 5310-01-523-9070 Washer, Key · 5310-01-523-9188 Nut, Plain, Wing →

5310-01-523-9101 — Nuts and Washers

Features

Washer,flat — FSC 5310
Overall Diameter: 0.370 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN
Cross-Sectional Shape Style: RECTANGULAR
Peripheral Shape Style: ROUND
Material: RUBBER ISOBUTYLENE-ISOPRENE CLASS IIR OVERALL
Center Hole Shape Style: ROUND
Hole Diameter: 0.169 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN
Thickness: 0.015 INCHES MINIMUM AND 0.047 INCHES MAXIMUM IN

Identification

NSN: 5310-01-523-9101
NIIN: 015239101
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives

General Description

The Washer,flat, cataloged under National Stock Number 5310-01-523-9101, 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7 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	5310-01-523-9101
Item Name	Washer,flat
FSC / FSG	5310 / 53 — Nuts and Washers
Status	ACTIVE
Overall Diameter	0.370 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN
Cross-Sectional Shape Style	RECTANGULAR
Peripheral Shape Style	ROUND
Material	RUBBER ISOBUTYLENE-ISOPRENE CLASS IIR OVERALL
Center Hole Shape Style	ROUND
Hole Diameter	0.169 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN
Thickness	0.015 INCHES MINIMUM AND 0.047 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

Cross-Reference Index

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
NAS1515K08L	5/2 Secondary reference U.S. Government activity
NAS1515K08L	3/2 Design 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 5310-01-523-9101?

NSN 5310-01-523-9101 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.

What are the specifications of 5310-01-523-9101?

Key specifications for 5310-01-523-9101: Overall Diameter: 0.370 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN; Cross-Sectional Shape Style: RECTANGULAR; Special Features: EDGE OF CENTER HOLE COLOR CODED ORANGE; WASHER IS INORGANIC ESTER RESISTANT; USED ON VALUE GUAGE INSTALLATION - BRAKE ACCUMULATOR CHARGING (LANDING GEAR ONLY); Peripheral Shape Style: ROUND. 7 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-523-9101 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.

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