PartsTable TECHNICAL DATA SHEET

NSN 5310-01-334-7251Government record, cited

Washer, Concave5310-01-334-7251

NSN 5310-01-334-7251 · NIIN 013347251 · Part number SI668C9G

Skyline Industries, Inc · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 24434

Government record, cited

NSN 5310-01-334-7251 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-334-7251. Manufacturer of record part number: SI668C9G.

Also searched as 5310-01-334-7251 · 5310013347251 · NIIN 013347251 · 01-334-7251 · FSC 5310 Nuts and Washers · CAGE 24434 · SI668C9G · C6599-C9G · C668C9G

Nearby stock numbers ← 5310-01-334-7250 Nut, Plain, Round · 5310-01-334-7388 Nut, Plain, Extended Washer, Hexago →

5310-01-334-7251 — Nuts and Washers

Features

Washer,concave — FSC 5310
1 manufacturer part number on file
Manufacturer of record: Skyline Industries, Inc

Identification

NSN: 5310-01-334-7251
NIIN: 013347251
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: SI668C9G
Manufacturer: Skyline Industries, Inc

General Description

The Washer,concave, cataloged under National Stock Number 5310-01-334-7251, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Skyline Industries, Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.

Catalog Facts

Item Name	Washer,concave
FSC / FSG	5310 — Nuts and Washers (FSG 53)
Manufacturers	Skyline Industries, Inc (CAGE 24434)

Technical Specifications

Parameter	Value
NSN	5310-01-334-7251
Primary Part Number	SI668C9G
Item Name	Washer,concave
FSC / FSG	5310 / 53 — Nuts and Washers
Manufacturer	Skyline Industries, Inc
Status	ACTIVE

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)

Cross-Reference Index

Part Number	Manufacturer
SI668C9G PRIMARY	Skyline Industries, Inc (USA)

Reference documents

Reference	Meaning
C6599-C9G	3/2 Design control — primary reference U.S. Government activity
C668C9G	5/9 Secondary reference 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 5310-01-334-7251?

NSN 5310-01-334-7251 is a Washer,concave, manufactured by Skyline Industries, Inc, classified under FSC 5310, Nuts and Washers. Status: active.

What part numbers are listed for NSN 5310-01-334-7251?

NSN 5310-01-334-7251 has 1 manufacturer part number on file: SI668C9G (Skyline Industries, Inc).

Is NSN 5310-01-334-7251 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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