Washer, Lock5310-01-560-6550

NSN 5310-01-560-6550 · NIIN 015606550 · Part number HH43031

Atlantic Fasteners Co Llc · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 1QYC9

Government record, cited

NSN 5310-01-560-6550 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-560-6550. Manufacturer of record part number: HH43031.

Also searched as 5310-01-560-6550 · 5310015606550 · NIIN 015606550 · 01-560-6550 · FSC 5310 Nuts and Washers · CAGE 1QYC9 · HH43031

Nearby stock numbers ← 5310-01-560-6460 Washer, Flat · 5310-01-560-6554 Washer, Lock →

5310-01-560-6550 — Nuts and Washers

Features

Washer,lock — FSC 5310
Style Designator: SPLIT HELICAL-RIGHT HAND
Hole Diameter: 0.312 INCHES NOMINAL IN
1 manufacturer part number on file
Manufacturer of record: Atlantic Fasteners Co Llc

Identification

NSN: 5310-01-560-6550
NIIN: 015606550
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: HH43031
Manufacturer: Atlantic Fasteners Co Llc

General Description

The Washer,lock, cataloged under National Stock Number 5310-01-560-6550, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Atlantic Fasteners Co Llc. Government technical data includes 2 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	5310-01-560-6550
Primary Part Number	HH43031
Item Name	Washer,lock
FSC / FSG	5310 / 53 — Nuts and Washers
Manufacturer	Atlantic Fasteners Co Llc
Status	ACTIVE
Style Designator	SPLIT HELICAL-RIGHT HAND
Hole Diameter	0.312 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
HH43031 PRIMARY	Atlantic Fasteners Co Llc (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 5310-01-560-6550?

NSN 5310-01-560-6550 is a Washer,lock, manufactured by Atlantic Fasteners Co Llc, classified under FSC 5310, Nuts and Washers. Status: active.

What part numbers are listed for NSN 5310-01-560-6550?

NSN 5310-01-560-6550 has 1 manufacturer part number on file: HH43031 (Atlantic Fasteners Co Llc).

What are the specifications of HH43031?

Key specifications for HH43031: Style Designator: SPLIT HELICAL-RIGHT HAND; Part Name Assigned by Controlling Agency: WASHER; End Item Identification: 7385927(53711) AFT PROPULSION SECTION ASSY.; Hole Diameter: 0.312 INCHES NOMINAL IN. 2 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-560-6550 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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