Washer, Flat5310-01-554-8321

NSN 5310-01-554-8321 · NIIN 015548321 · Part number 91201A011

Mcmaster-Carr Supply Company · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 2V507

Government record, cited

NSN 5310-01-554-8321 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-554-8321. Manufacturer of record part number: 91201A011.

Also searched as 5310-01-554-8321 · 5310015548321 · NIIN 015548321 · 01-554-8321 · FSC 5310 Nuts and Washers · CAGE 2V507 · 91201A011

Nearby stock numbers ← 5310-01-554-8312 Nut, Plain, Hexagon · 5310-01-554-8325 Washer, Flat →

5310-01-554-8321 — Nuts and Washers

Features

Washer,flat — FSC 5310
Overall Diameter: 0.500 INCHES NOMINAL IN
Peripheral Shape Style: ROUND
Center Hole Shape Style: ROUND
Hole Diameter: 0.203 INCHES NOMINAL IN
1 manufacturer part number on file
Manufacturer of record: Mcmaster-Carr Supply Company

Identification

NSN: 5310-01-554-8321
NIIN: 015548321
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: 91201A011
Manufacturer: Mcmaster-Carr Supply Company

General Description

The Washer,flat, cataloged under National Stock Number 5310-01-554-8321, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Company. Government technical data includes 4 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	5310-01-554-8321
Primary Part Number	91201A011
Item Name	Washer,flat
FSC / FSG	5310 / 53 — Nuts and Washers
Manufacturer	Mcmaster-Carr Supply Company
Status	ACTIVE
Overall Diameter	0.500 INCHES NOMINAL IN
Peripheral Shape Style	ROUND
Center Hole Shape Style	ROUND
Hole Diameter	0.203 INCHES NOMINAL 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

Part Number	Manufacturer
91201A011 PRIMARY	Mcmaster-Carr Supply Company (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 5310-01-554-8321?

NSN 5310-01-554-8321 is a Washer,flat, manufactured by Mcmaster-Carr Supply Company, classified under FSC 5310, Nuts and Washers. Status: active.

What part numbers are listed for NSN 5310-01-554-8321?

NSN 5310-01-554-8321 has 1 manufacturer part number on file: 91201A011 (Mcmaster-Carr Supply Company).

What are the specifications of 91201A011?

Key specifications for 91201A011: Overall Diameter: 0.500 INCHES NOMINAL IN; Special Features: THICKNESS MIN-MAX 0.084-0.104";SCREW SIZE 10;MATERIAL: 12L4 LOW-CARBON STEEL;QUANTITY REQUIRED 2; Peripheral Shape Style: ROUND; End Item Identification: 2320-01-529-2251 TRUCK, BOMB SERVICE. 4 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-554-8321 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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