Washer, Recessed5310-01-171-6549

NSN 5310-01-171-6549 · NIIN 011716549 · Part number 5210504

Naval Sea Systems Command · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 53711

Government record, cited

NSN 5310-01-171-6549 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-171-6549. Manufacturer of record part number: 5210504.

Also searched as 5310-01-171-6549 · 5310011716549 · NIIN 011716549 · 01-171-6549 · FSC 5310 Nuts and Washers · CAGE 53711 · 5210504

Nearby stock numbers ← 5310-01-171-6548 Washer, Key · 5310-01-171-6727 Nut, Self-Locking, Spline →

5310-01-171-6549 — Nuts and Washers

Features

Washer,recessed — FSC 5310
Surface Finish: 16.0 MICROINCHES OUTER
Style Designator: RECESSED
Material Document and Classification: QQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE OR ASTM A276,COND A ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Outside Diameter: 3.497 INCHES MINIMUM AND 3.500 INCHES MAXIMUM IN
Recess Depth: 0.160 INCHES NOMINAL IN
Recess Diameter: 3.250 INCHES NOMINAL IN
Material: STEEL COMP 316 OVERALL

Identification

NSN: 5310-01-171-6549
NIIN: 011716549
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: 5210504
Manufacturer: Naval Sea Systems Command

General Description

The Washer,recessed, cataloged under National Stock Number 5310-01-171-6549, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 8 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	5310-01-171-6549
Primary Part Number	5210504
Item Name	Washer,recessed
FSC / FSG	5310 / 53 — Nuts and Washers
Manufacturer	Naval Sea Systems Command
Status	ACTIVE
Surface Finish	16.0 MICROINCHES OUTER
Style Designator	RECESSED
Material Document and Classification	QQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE OR ASTM A276,COND A ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Outside Diameter	3.497 INCHES MINIMUM AND 3.500 INCHES MAXIMUM IN
Recess Depth	0.160 INCHES NOMINAL IN
Recess Diameter	3.250 INCHES NOMINAL IN
Material	STEEL COMP 316 OVERALL
Hole Diameter	2.364 INCHES MINIMUM AND 2.366 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

Part Number	Manufacturer
5210504 PRIMARY	Naval Sea Systems Command (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 5310-01-171-6549?

NSN 5310-01-171-6549 is a Washer,recessed, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.

What part numbers are listed for NSN 5310-01-171-6549?

NSN 5310-01-171-6549 has 1 manufacturer part number on file: 5210504 (Naval Sea Systems Command).

What are the specifications of 5210504?

Key specifications for 5210504: Surface Finish: 16.0 MICROINCHES OUTER; Overall Height: 0.810 INCHES NOMINAL IN; Style Designator: RECESSED; Material Document and Classification: QQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE OR ASTM A276,COND A ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 8 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-171-6549 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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