PartsTable TECHNICAL DATA SHEET

NSN 5340-01-521-2937Government record, cited

Cap, Protective, Dust and Moisture5340-01-521-2937

NSN 5340-01-521-2937 · NIIN 015212937

FSC 5340 — Hardware, Commercial · FSG 53 — Hardware and Abrasives

Government record, cited

Also searched as 5340-01-521-2937 · 5340015212937 · NIIN 015212937 · 01-521-2937 · FSC 5340 Hardware, Commercial · NAS837 · NAS837-16

Nearby stock numbers ← 5340-01-521-2935 Cap, Protective, Dust and Moisture · 5340-01-521-2974 Deflector, Dirt and Liquid →

Features

Cap,protective,dust and Moisture — FSC 5340
Design Type: FRICTION
Overall Diameter: 1.125 INCHES NOMINAL IN
Specification/standard Data: 80205-NAS837 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Opening Inside Diameter for Which Designed: 0.893 INCHES NOMINAL IN
Material: PLASTIC, POLYETHYLENE (PP)
Inside Diameter Length: 0.625 INCHES NOMINAL IN

Identification

NSN: 5340-01-521-2937
NIIN: 015212937
FSC: 5340 — Hardware, Commercial
FSG: 53 — Hardware and Abrasives

General Description

The Cap,protective,dust and Moisture, cataloged under National Stock Number 5340-01-521-2937, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.

Technical Specifications

Parameter	Value
NSN	5340-01-521-2937
Item Name	Cap,protective,dust and Moisture
FSC / FSG	5340 / 53 — Hardware, Commercial
Status	ACTIVE
Design Type	FRICTION
Overall Diameter	1.125 INCHES NOMINAL IN
Specification/standard Data	80205-NAS837 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Opening Inside Diameter for Which Designed	0.893 INCHES NOMINAL IN
Material	PLASTIC, POLYETHYLENE (PP)
Inside Diameter Length	0.625 INCHES NOMINAL IN

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	Possible hazard — SDS may be required (DLA HMIC P)
Criticality Code	X
Unit of Issue	EA

⇄ Related Items 8

Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.

5340-01-521-4144NAS837-22 POSSIBLE MATCH

CAP,PROTECTIVE,DUST AND MOISTURE

Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use

5340-01-615-7336NAS837-10C POSSIBLE MATCH

CAP,PROTECTIVE,DUST AND MOISTURE

Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use

5340-01-615-7391NAS837-8C POSSIBLE MATCH

CAP,PROTECTIVE,DUST AND MOISTURE

Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use

5340-01-615-7399NAS837-8 POSSIBLE MATCH

CAP,PROTECTIVE,DUST AND MOISTURE

Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use

5340-01-615-7401NAS837-24C POSSIBLE MATCH

CAP,PROTECTIVE,DUST AND MOISTURE

Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use

5340-01-615-7403NAS837-20 POSSIBLE MATCH

CAP,PROTECTIVE,DUST AND MOISTURE

Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use

5340-01-615-7414NAS837-14C POSSIBLE MATCH

CAP,PROTECTIVE,DUST AND MOISTURE

Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use

5340-01-615-7423NAS837-18C POSSIBLE MATCH

CAP,PROTECTIVE,DUST AND MOISTURE

Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use

Cross-Reference Index

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

Reference documents

Reference	Meaning
NAS837	3/1 Design control — primary reference U.S. Government activity
NAS837-16	3/2 Design control — primary reference U.S. Government activity

Related Parts

5340-01-521-4144POSSIBLE MATCH

CAP,PROTECTIVE,DUST AND MOISTURE

NAS837-22

5340-01-615-7336POSSIBLE MATCH

CAP,PROTECTIVE,DUST AND MOISTURE

NAS837-10C

5340-01-615-7391POSSIBLE MATCH

CAP,PROTECTIVE,DUST AND MOISTURE

NAS837-8C

5340-01-615-7399POSSIBLE MATCH

CAP,PROTECTIVE,DUST AND MOISTURE

NAS837-8

5340-01-615-7401POSSIBLE MATCH

CAP,PROTECTIVE,DUST AND MOISTURE

NAS837-24C

5340-01-615-7403POSSIBLE MATCH

CAP,PROTECTIVE,DUST AND MOISTURE

NAS837-20

5340-01-615-7414POSSIBLE MATCH

CAP,PROTECTIVE,DUST AND MOISTURE

NAS837-14C

5340-01-615-7423POSSIBLE MATCH

CAP,PROTECTIVE,DUST AND MOISTURE

NAS837-18C

Frequently Asked Questions

What is NSN 5340-01-521-2937?

NSN 5340-01-521-2937 is a Cap,protective,dust and Moisture, classified under FSC 5340, Hardware, Commercial. Status: active.

What NSN replaces 5340-01-521-2937?

8 possible matches (shared part number, not a government interchangeability claim): 5340-01-521-4144, 5340-01-615-7336, 5340-01-615-7391. Verify interchangeability with system specifications before substitution.

What are the specifications of 5340-01-521-2937?

Key specifications for 5340-01-521-2937: Design Type: FRICTION; Overall Diameter: 1.125 INCHES NOMINAL IN; Specification/standard Data: 80205-NAS837 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD; Opening Inside Diameter for Which Designed: 0.893 INCHES NOMINAL IN. 6 specifications are documented in the U.S. Government catalog.

Is NSN 5340-01-521-2937 hazardous material?

Possible hazard — SDS may be required (DLA HMIC P). 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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