Washer, Lock5310-01-178-1305

NSN 5310-01-178-1305 · NIIN 011781305

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

Government record, cited

Also searched as 5310-01-178-1305 · 5310011781305 · NIIN 011781305 · 01-178-1305 · FSC 5310 Nuts and Washers · 91100374 · 91100374N · 91100374N

Nearby stock numbers ← 5310-01-178-1304 · 5310-01-178-1306 Washer, Bevel →

5310-01-178-1305 — Nuts and Washers

Features

Washer,lock — FSC 5310
Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
Style Designator: FLAT INTERNAL TEETH
Outside Diameter: 1.045 INCHES MINIMUM AND 1.071 INCHES MAXIMUM IN
Material Thickness: 0.042 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
Material: STEEL OVERALL
Hole Diameter: 0.640 INCHES MINIMUM AND 0.663 INCHES MAXIMUM IN

Identification

NSN: 5310-01-178-1305
NIIN: 011781305
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives

General Description

The Washer,lock, cataloged under National Stock Number 5310-01-178-1305, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	5310-01-178-1305
Item Name	Washer,lock
FSC / FSG	5310 / 53 — Nuts and Washers
Status	ACTIVE
Hardness Rating	40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
Style Designator	FLAT INTERNAL TEETH
Outside Diameter	1.045 INCHES MINIMUM AND 1.071 INCHES MAXIMUM IN
Material Thickness	0.042 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
Material	STEEL OVERALL
Hole Diameter	0.640 INCHES MINIMUM AND 0.663 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
91100374	5/9 Secondary reference U.S. Government activity
91100374N	3/9 Design control — primary reference U.S. Government activity
91100374N	C/1 Advisory reference — outside the item-of-supply concept Fairbanks Morse, Llc

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 5310-01-178-1305?

NSN 5310-01-178-1305 is a Washer,lock, classified under FSC 5310, Nuts and Washers. Status: active.

What are the specifications of 5310-01-178-1305?

Key specifications for 5310-01-178-1305: Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM; Style Designator: FLAT INTERNAL TEETH; Outside Diameter: 1.045 INCHES MINIMUM AND 1.071 INCHES MAXIMUM IN; Material Thickness: 0.042 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN. 6 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-178-1305 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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