Washer, Recessed5310-01-266-3893

NSN 5310-01-266-3893 · NIIN 012663893

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

Government record, cited

Also searched as 5310-01-266-3893 · 5310012663893 · NIIN 012663893 · 01-266-3893 · FSC 5310 Nuts and Washers

Nearby stock numbers ← 5310-01-266-3850 Washer, Spring Tension · 5310-01-266-3957 Nut, Self-Locking, Hexagon →

5310-01-266-3893 — Nuts and Washers

Features

Washer,recessed — FSC 5310
Surface Finish: 63.0 MICROINCHES BOTTOM
Surface Finish: 63.0 MICROINCHES TOP
Top Recess Diameter: 0.573 INCHES NOMINAL IN
Bottom Recess Diameter: 0.573 INCHES NOMINAL IN
Hardness Rating: 29.0 ROCKWELL C MINIMUM AND 39.0 ROCKWELL C MAXIMUM
Top Recess Angle: 90.0 DEGREES NOMINAL
Style Designator: RECESSED BOTH SIDES

Identification

NSN: 5310-01-266-3893
NIIN: 012663893
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives

General Description

The Washer,recessed, cataloged under National Stock Number 5310-01-266-3893, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	5310-01-266-3893
Item Name	Washer,recessed
FSC / FSG	5310 / 53 — Nuts and Washers
Status	ACTIVE
Surface Finish	63.0 MICROINCHES BOTTOM
Surface Finish	63.0 MICROINCHES TOP
Top Recess Diameter	0.573 INCHES NOMINAL IN
Bottom Recess Diameter	0.573 INCHES NOMINAL IN
Hardness Rating	29.0 ROCKWELL C MINIMUM AND 39.0 ROCKWELL C MAXIMUM
Top Recess Angle	90.0 DEGREES NOMINAL
Style Designator	RECESSED BOTH SIDES
Material Document and Classification	AMS 5525 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5737 ASSN STD 2ND MATERIAL RESPONSE OVERALL
Outside Diameter	1.178 INCHES MINIMUM AND 1.198 INCHES MAXIMUM IN
Material Thickness	0.155 INCHES MINIMUM AND 0.165 INCHES MAXIMUM IN
Bottom Recess Angle	90.0 DEGREES NOMINAL
Hole Diameter	0.504 INCHES MINIMUM AND 0.515 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
MS9768-14	2/2 Government specification standardization 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 5310-01-266-3893?

NSN 5310-01-266-3893 is a Washer,recessed, classified under FSC 5310, Nuts and Washers. Status: active.

What are the specifications of 5310-01-266-3893?

Key specifications for 5310-01-266-3893: Surface Finish: 63.0 MICROINCHES BOTTOM; Surface Finish: 63.0 MICROINCHES TOP; Top Recess Diameter: 0.573 INCHES NOMINAL IN; Bottom Recess Diameter: 0.573 INCHES NOMINAL IN. 12 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-266-3893 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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