PartsTable TECHNICAL DATA SHEET

NSN 5310-01-256-0421Government record, cited

Washer, Flat5310-01-256-0421

NSN 5310-01-256-0421 · NIIN 012560421 · Part number SS-8-VCR-2

Swagelok Co · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 3T9T9

Government record, cited

NSN 5310-01-256-0421 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-256-0421. Manufacturer of record part number: SS-8-VCR-2.

Also searched as 5310-01-256-0421 · 5310012560421 · NIIN 012560421 · 01-256-0421 · FSC 5310 Nuts and Washers · CAGE 3T9T9 · SS-8-VCR-2

Nearby stock numbers ← 5310-01-256-0420 · 5310-01-256-0423 Washer, Concave →

5310-01-256-0421 — Nuts and Washers

Features

Washer,flat — FSC 5310
Overall Diameter: 0.781 INCHES NOMINAL IN
Precious Material: SILVER
Cross-Sectional Shape Style: RECTANGULAR
Surface Treatment: SILVER OVERALL
Precious Material and Location: ALL SURFACES SILVER
Peripheral Shape Style: ROUND
Material: STEEL COMP 316 OVERALL

Identification

NSN: 5310-01-256-0421
NIIN: 012560421
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: SS-8-VCR-2
Manufacturer: Swagelok Co

General Description

The Washer,flat, cataloged under National Stock Number 5310-01-256-0421, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Swagelok Co. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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	5310-01-256-0421
Primary Part Number	SS-8-VCR-2
Item Name	Washer,flat
FSC / FSG	5310 / 53 — Nuts and Washers
Manufacturer	Swagelok Co
Status	ACTIVE
Overall Diameter	0.781 INCHES NOMINAL IN
Precious Material	SILVER
Cross-Sectional Shape Style	RECTANGULAR
Surface Treatment	SILVER OVERALL
Precious Material and Location	ALL SURFACES SILVER
Peripheral Shape Style	ROUND
Material	STEEL COMP 316 OVERALL
Center Hole Shape Style	ROUND
Hole Diameter	0.438 INCHES NOMINAL IN
Thickness	0.031 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
SS-8-VCR-2 PRIMARY	Swagelok Co (USA)

Reference documents

Reference	Meaning
SS-8-VCR-2	5/9 Secondary reference Cajon Co

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 5310-01-256-0421?

NSN 5310-01-256-0421 is a Washer,flat, manufactured by Swagelok Co, classified under FSC 5310, Nuts and Washers. Status: active.

What part numbers are listed for NSN 5310-01-256-0421?

NSN 5310-01-256-0421 has 1 manufacturer part number on file: SS-8-VCR-2 (Swagelok Co).

What are the specifications of SS-8-VCR-2?

Key specifications for SS-8-VCR-2: Overall Diameter: 0.781 INCHES NOMINAL IN; Precious Material: SILVER; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: SILVER OVERALL. 10 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-256-0421 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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