Washer, Shouldered and Recessed5310-01-055-2028

NSN 5310-01-055-2028 · NIIN 010552028 · Part number 42801A

Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 73760

Government record, cited

NSN 5310-01-055-2028 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-055-2028. Manufacturer of record part number: 42801A.

Also searched as 5310-01-055-2028 · 5310010552028 · NIIN 010552028 · 01-055-2028 · FSC 5310 Nuts and Washers · CAGE 73760 · 42801A

Nearby stock numbers ← 5310-01-055-2027 · 5310-01-055-2838 Washer, Key →

5310-01-055-2028 — Nuts and Washers

Features

Washer,shouldered and Recessed — FSC 5310
Surface Treatment Document and Classification: MIL-A-8625,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
Shoulder Height: 0.060 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN
Style Designator: SHOULDERED AND RECESSED
Material Document and Classification: QQ-A-200/3 FED SPEC 1ST MATERIAL RESPONSE AND QQ-A-225/6,T351 FED SPEC 2ND MATERIAL RESPONSE OVERALL
Outside Diameter: 0.990 INCHES MINIMUM AND 0.991 INCHES MAXIMUM IN
Recess Depth: 0.443 INCHES MINIMUM AND 0.453 INCHES MAXIMUM IN
Material Thickness: 0.449 INCHES MINIMUM AND 0.459 INCHES MAXIMUM IN

Identification

NSN: 5310-01-055-2028
NIIN: 010552028
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: 42801A
Manufacturer: Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S

General Description

The Washer,shouldered and Recessed, cataloged under National Stock Number 5310-01-055-2028, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S. Government technical data includes 12 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	5310-01-055-2028
Primary Part Number	42801A
Item Name	Washer,shouldered and Recessed
FSC / FSG	5310 / 53 — Nuts and Washers
Manufacturer	Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S
Status	ACTIVE
Surface Treatment Document and Classification	MIL-A-8625,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
Shoulder Height	0.060 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN
Style Designator	SHOULDERED AND RECESSED
Material Document and Classification	QQ-A-200/3 FED SPEC 1ST MATERIAL RESPONSE AND QQ-A-225/6,T351 FED SPEC 2ND MATERIAL RESPONSE OVERALL
Outside Diameter	0.990 INCHES MINIMUM AND 0.991 INCHES MAXIMUM IN
Recess Depth	0.443 INCHES MINIMUM AND 0.453 INCHES MAXIMUM IN
Material Thickness	0.449 INCHES MINIMUM AND 0.459 INCHES MAXIMUM IN
Shoulder Diameter	0.964 INCHES MINIMUM AND 0.966 INCHES MAXIMUM IN
Recess Diameter	0.825 INCHES MINIMUM AND 0.833 INCHES MAXIMUM IN
Surface Treatment	ANODIZE OVERALL
Material	ALUMINUM ALLOY 2024 OVERALL
Hole Diameter	0.665 INCHES MINIMUM AND 0.668 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
42801A PRIMARY	Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S (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 5310-01-055-2028?

NSN 5310-01-055-2028 is a Washer,shouldered and Recessed, manufactured by Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S, classified under FSC 5310, Nuts and Washers. Status: active.

What part numbers are listed for NSN 5310-01-055-2028?

NSN 5310-01-055-2028 has 1 manufacturer part number on file: 42801A (Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S).

What are the specifications of 42801A?

Key specifications for 42801A: Surface Treatment Document and Classification: MIL-A-8625,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Shoulder Height: 0.060 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN; Style Designator: SHOULDERED AND RECESSED; Material Document and Classification: QQ-A-200/3 FED SPEC 1ST MATERIAL RESPONSE AND QQ-A-225/6,T351 FED SPEC 2ND MATERIAL RESPONSE OVERALL. 12 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-055-2028 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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