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Spring Tension Washer

NSN: 5310-01-030-4920 | Model: ST4M178A4

A bent spring metal washer with a centrally located hole. It is designed to exert pressure axially when assembled in place.

NSN Properties and Flags
NATO Stock Number
5310-01-030-4920
DEMIL
NO
Hole Diameter
2.400 inches
Outside Diameter
2.860 inches
Overall Height
0.307 inches
Material Thickness
0.025 inches
Special Features
One tab, 0.200 in. W, on each side of center hole
Material
Copper alloy 172
Material Specification
Qq-c-533, temper at federal specification single material response
Surface Treatment
Tin
Surface Treatment Specification
Mil-t-10727 military specification single treatment response
Style Designator
Spring tension
Recent Solicitations
Solicitation Return by Date Buyer Code Quantity
SPE5E717T3275 2016-12-21 PHPHA 798 EA
SPE5E716TC759 2016-08-08 PHPHA 1037 EA
SPE5E715T7596 2015-05-18 PHPHA 460 EA

Inventory Check

The last inventory check on this NSN was done on 04/09/2024. Due to rapid changes in inventory this may not be the current stock qty.

  • New Surplus: 32
  • New: 244

Pricing and Availability

Send us a request for quote using the form below. Our team will contact you with an up to date pricing and availability quote ASAP.

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NSN 5310-01-030-4920 Datasheet

Supply Class (FSC):
Nuts And Washers
Cross Reference:
  • ST4M178A4
  • ST4M178A4
  • ST4M178 REV D
Cage Codes:
  • Boeing Company, The (CAGE 76301)
  • Etch Inc Tech (CAGE 89295)
Schedule B & Trade:
  • Schedule B: 7415210000 (NAICS 332722)

    Copper washers including spring washers not threaded

  • SITC: 69432

    Washers (including spring washers) and similar articles, not threaded, of copper

  • End Use: 12300

    Finished metal shapes

Identification:
HMIC

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

PMIC

U - Precious metal content is unknown

CRITL

- The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Freight Information:
  • NMFC:

    194120 - Washers/gaskets/pckg dvcs noi

  • WCC:

    713 - Metal hardware

  • SHC:

    9 - Other or no special handling required (sh)

  • ADC:

    A - Shipment is not a consolidation and does not exceed 84 inches in any dimension.

  • ACC:

    B - Construction materials: includes paint and related materials, prefabricated building, wood products, metal and composition mater

  • LTL:

    W - Rating variable

  • TCC:

    Z - No special type of cargo code applicable

NSN Management Codes:
  • SOS
    Sms
  • AAC
    D
  • Quantity per pack
    1
  • Unit of Measure
    Ea
  • Shelf Life
    N/A
  • Classification Control
    U
  • MGMT_CTL
    Sf9sx-v
  • Repariability

Questions & Answers:
What are the historical prices recorded for this stock number?
Historical data shows pricing from $77.31 to $128.86..
Does NSN 5310-01-030-4920 have a shelf life?
No. There is no shelf life applicable for this NSN.
What NATO entities are users of this NSN?
Department Of The Air Force, Department Of The Navy, and Republic Of Korea
What is the NIIN of NSN 5310-01-030-4920?
010304920 or 01-030-4920
Does NSN 5310-01-030-4920 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 5310-01-030-4920?
Solicitation SPE5E717T3275 for qty 798 on 12/14/2016
When was this national stock number assigned to the federal catalog?
Nov 07, 1976