Washer, Flat5310-01-027-6437

NSN 5310-01-027-6437 · NIIN 010276437 · Part number B70003

O T S I · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 05825

Government record, cited

NSN 5310-01-027-6437 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-027-6437. Manufacturer of record part number: B70003.

Also searched as 5310-01-027-6437 · 5310010276437 · NIIN 010276437 · 01-027-6437 · FSC 5310 Nuts and Washers · CAGE 05825 · B70003

Nearby stock numbers ← 5310-01-027-6436 Washer, Flat · 5310-01-027-6438 →

5310-01-027-6437 — Nuts and Washers

Features

Washer,flat — FSC 5310
Overall Diameter: 1.000 INCHES NOMINAL IN
Hardness Rating: 40.0 DUROMETER MINIMUM AND 50.0 DUROMETER MAXIMUM
Cross-Sectional Shape Style: RECTANGULAR
Peripheral Shape Style: ROUND
Material: RUBBER SYNTHETIC OVERALL
Center Hole Shape Style: ROUND
Hole Diameter: 0.250 INCHES NOMINAL IN

Identification

NSN: 5310-01-027-6437
NIIN: 010276437
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: B70003
Manufacturer: O T S I

General Description

The Washer,flat, cataloged under National Stock Number 5310-01-027-6437, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is O T S I. 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	5310-01-027-6437
Primary Part Number	B70003
Item Name	Washer,flat
FSC / FSG	5310 / 53 — Nuts and Washers
Manufacturer	O T S I
Status	ACTIVE
Overall Diameter	1.000 INCHES NOMINAL IN
Hardness Rating	40.0 DUROMETER MINIMUM AND 50.0 DUROMETER MAXIMUM
Cross-Sectional Shape Style	RECTANGULAR
Peripheral Shape Style	ROUND
Material	RUBBER SYNTHETIC OVERALL
Center Hole Shape Style	ROUND
Hole Diameter	0.250 INCHES NOMINAL IN
Thickness	0.250 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
B70003 PRIMARY	O T S I (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 5310-01-027-6437?

NSN 5310-01-027-6437 is a Washer,flat, manufactured by O T S I, classified under FSC 5310, Nuts and Washers. Status: active.

What part numbers are listed for NSN 5310-01-027-6437?

NSN 5310-01-027-6437 has 1 manufacturer part number on file: B70003 (O T S I).

What are the specifications of B70003?

Key specifications for B70003: Overall Diameter: 1.000 INCHES NOMINAL IN; Hardness Rating: 40.0 DUROMETER MINIMUM AND 50.0 DUROMETER MAXIMUM; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND. 8 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-027-6437 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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