Cover, Access5340-01-525-3871

NSN 5340-01-525-3871 · NIIN 015253871 · Part number 257A498-1

Lockheed Martin Corporation Div Rotary and Mission Systems · FSC 5340 — Hardware, Commercial · FSG 53 — Hardware and Abrasives · CAGE 03640

Government record, cited

NSN 5340-01-525-3871 — this item is cataloged by the U.S. Government under National Stock Number 5340-01-525-3871. Manufacturer of record part number: 257A498-1.

Also searched as 5340-01-525-3871 · 5340015253871 · NIIN 015253871 · 01-525-3871 · FSC 5340 Hardware, Commercial · CAGE 03640 · 257A498-1

Nearby stock numbers ← 5340-01-525-3869 Plate, Mounting · 5340-01-525-3872 Bracket, Double Angle →

Features

Cover,access — FSC 5340
Bolt Circle Hole Quantity: 7
Outside Diameter: 16.642 INCHES NOMINAL IN
Bolt Circle Diameter: 0.312 INCHES NOMINAL IN
Peripheral Shape Style: ROUND, MULTI HOLES
1 manufacturer part number on file
Manufacturer of record: Lockheed Martin Corporation Div Rotary and Mission Systems

Identification

NSN: 5340-01-525-3871
NIIN: 015253871
FSC: 5340 — Hardware, Commercial
FSG: 53 — Hardware and Abrasives
Primary part number: 257A498-1
Manufacturer: Lockheed Martin Corporation Div Rotary and Mission Systems

General Description

The Cover,access, cataloged under National Stock Number 5340-01-525-3871, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rotary and Mission Systems. Government technical data includes 4 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. Unit of issue: EA.

Technical Specifications

Parameter	Value
NSN	5340-01-525-3871
Primary Part Number	257A498-1
Item Name	Cover,access
FSC / FSG	5340 / 53 — Hardware, Commercial
Manufacturer	Lockheed Martin Corporation Div Rotary and Mission Systems
Status	ACTIVE
Bolt Circle Hole Quantity	7
Outside Diameter	16.642 INCHES NOMINAL IN
Bolt Circle Diameter	0.312 INCHES NOMINAL IN
Peripheral Shape Style	ROUND, MULTI HOLES

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

Cross-Reference Index

Part Number	Manufacturer
257A498-1 PRIMARY	Lockheed Martin Corporation Div Rotary and Mission Systems (USA)

No interchangeability data on file.

Other items in FSC 5340 — Hardware, Commercial

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

5340-00-000-0068

COVER,ACCESS

5340-00-000-0132

SEAT,HELICAL COMPRESSION SPRING

5340-00-000-8150

5340-00-000-8150 · Item name not on file

5340-00-001-1251

5340-00-001-1251 · Item name not on file

5340-00-001-1264

STRAP,WEBBING

5340-00-001-1265

STRAP,WEBBING

5340-00-001-1266

STRAP,WEBBING

5340-00-001-1275

HANDLE,DOOR

Frequently Asked Questions

What is NSN 5340-01-525-3871?

NSN 5340-01-525-3871 is a Cover,access, manufactured by Lockheed Martin Corporation Div Rotary and Mission Systems, classified under FSC 5340, Hardware, Commercial. Status: active.

What part numbers are listed for NSN 5340-01-525-3871?

NSN 5340-01-525-3871 has 1 manufacturer part number on file: 257A498-1 (Lockheed Martin Corporation Div Rotary and Mission Systems).

What are the specifications of 257A498-1?

Key specifications for 257A498-1: Bolt Circle Hole Quantity: 7; Outside Diameter: 16.642 INCHES NOMINAL IN; Bolt Circle Diameter: 0.312 INCHES NOMINAL IN; Special Features: LEFTHAND COVER. 4 specifications are documented in the U.S. Government catalog.

Is NSN 5340-01-525-3871 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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