ST4M178A5

Spring Tension Washer

This page provides complete and verified information for part number ST4M178A5, NSN 5310-01-030-4921

You’ll find detailed technical specifications, product attributes, condition classification, and real-time stock availability. All data is based on official records and meets industry standards for defense, aerospace, and industrial sourcing. Whether you’re performing a parts audit, validating compliance, or preparing a purchase order, this part listing supports accurate and efficient procurement.

Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-030-4921

Item Name Code

15938

Assigment Date

08/23/1985 (40 years ago)

2.870 inches nominal hole diameter, 3.330 inches nominal outside diameter, 0.025 inches nominal material thickness, one tab 0.200 in.w on each side of center hole special features, 0.307 inches nominal overall height

Characteristics

Below are the official specifications and performance details for this part, including technical data, material composition, and compliance information.

Hole Diameter: 2.870 inches nominal
Outside Diameter: 3.330 inches nominal
Overall Height: 0.307 inches nominal
Material Thickness: 0.025 inches nominal
Special Features: one tab 0.200 in.w on each side of center hole
Material: copper alloy 172 overall
Material Document And Classification: qq-c-533,tat fed spec single material response overall
Surface Treatment: tin overall
Surface Treatment Document And Classification: mil-t-10727 mil spec single treatment response overall
Style Designator: spring tension

Classification Data

Detailed NSN information including identification codes, classification data, and key indicators used for cataloging, logistics, and supply management.

Type of Item Identification
Automatic Data Processing Point
Demilitarization
Criticality
Federal Item Identification Guide
Precious Metals Indicator
Pseudo Item Name Code
Hazardous Material Indicator
Schedule B Code

Freight Information

Comprehensive freight classifications, shipping codes, and handling specifications for domestic and international transport compliance.

Major Organizational Entity
National Motor Freight Classification Item Number
National Motor Freight Classification Sub-Item Number
Uniform Freight Classification Item Number
National Motor Freight Class Rating
Water Commodity
Type of Cargo
Special Hand
Air Dimension
Air Commodity
National Motor Freight Description

FAQs

Get insights on installation procedures, operating conditions, care instructions, industry regulations, and common issues. FAQs below provide key information for ST4M178A5

What is the FSCG of the NSN 5310-01-030-4921?

The FSCG of the NSN 5310-01-030-4921 is 5310

Does the NSN 5310-01-030-4921 have a Schedule B code assigned?

Yes, the Schedule B code is 7415210000

Does NSN 5310-01-030-4921 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 5310-01-030-4921 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-01-030-4921 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 5310-01-030-4921 was assigned to the Federal Catalog?

It was assigned 40 years ago, on Fri, Aug 23, 1985