Washer, Recessed5310-01-339-6991

NSN 5310-01-339-6991 · NIIN 013396991

FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives

Government record, cited

Also searched as 5310-01-339-6991 · 5310013396991 · NIIN 013396991 · 01-339-6991 · FSC 5310 Nuts and Washers

Nearby stock numbers ← 5310-01-339-6990 Washer, Flat · 5310-01-339-7236 Nut, Plain, Hexagon →

5310-01-339-6991 — Nuts and Washers

Features

Washer,recessed — FSC 5310
Top Recess Diameter: 1.063 INCHES MINIMUM AND 1.093 INCHES MAXIMUM IN
Bottom Recess Diameter: 1.063 INCHES MINIMUM AND 1.093 INCHES MAXIMUM IN
Hardness Rating: 58.0 ROCKWELL C MINIMUM
Top Recess Angle: 90.0 DEGREES NOMINAL
Style Designator: RECESSED BOTH SIDES
Outside Diameter: 1.4253 INCHES MINIMUM AND 1.4255 INCHES MAXIMUM IN
Material Thickness: 0.256 INCHES MINIMUM AND 0.258 INCHES MAXIMUM IN

Identification

NSN: 5310-01-339-6991
NIIN: 013396991
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives

General Description

The Washer,recessed, cataloged under National Stock Number 5310-01-339-6991, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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	5310-01-339-6991
Item Name	Washer,recessed
FSC / FSG	5310 / 53 — Nuts and Washers
Status	ACTIVE
Top Recess Diameter	1.063 INCHES MINIMUM AND 1.093 INCHES MAXIMUM IN
Bottom Recess Diameter	1.063 INCHES MINIMUM AND 1.093 INCHES MAXIMUM IN
Hardness Rating	58.0 ROCKWELL C MINIMUM
Top Recess Angle	90.0 DEGREES NOMINAL
Style Designator	RECESSED BOTH SIDES
Outside Diameter	1.4253 INCHES MINIMUM AND 1.4255 INCHES MAXIMUM IN
Material Thickness	0.256 INCHES MINIMUM AND 0.258 INCHES MAXIMUM IN
Bottom Recess Angle	90.0 DEGREES NOMINAL
Material	STEEL COMP E9310 OVERALL
Hole Diameter	1.010 INCHES MINIMUM AND 1.015 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

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
722752GC	3/2 Design control — primary 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 5310-01-339-6991?

NSN 5310-01-339-6991 is a Washer,recessed, classified under FSC 5310, Nuts and Washers. Status: active.

What are the specifications of 5310-01-339-6991?

Key specifications for 5310-01-339-6991: Top Recess Diameter: 1.063 INCHES MINIMUM AND 1.093 INCHES MAXIMUM IN; Bottom Recess Diameter: 1.063 INCHES MINIMUM AND 1.093 INCHES MAXIMUM IN; Hardness Rating: 58.0 ROCKWELL C MINIMUM; Top Recess Angle: 90.0 DEGREES NOMINAL. 10 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-339-6991 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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