Home · FSC 5310 Nuts And Washers · NSN 5310-01-490-3137

NSN 5310-01-490-3137 — Washer,Flat

NIIN 01-490-3137 · unit of issue EA · AAC D (stocked, centrally managed (dla)) · source of supply SMS

Buying rhythm

from 6 government buys since 2017

The government has bought this item about every 1.6 years (very regular, gaps vary ±10%). Last buy Jun 26, 2025. If the rhythm holds, the next one falls between Apr 15, 2026 and Nov 22, 2027: a buy is due about now. 1 solicitation is open right now.

How well this works: for very regular items, "next buy about one typical gap after the last, give or take 112 days" caught the actual next buy 49% of the time across 5,054 past buys, against 20% for a fixed "one year later" guess. A rhythm, not a schedule: DLA buys when stock and demand say so. Every item due for a buy now.

NSN 5310-01-490-3137 is the national stock number for a washer,flat in federal supply class 5310 (Nuts And Washers). It cross-references to 3 manufacturer part numbers from 3 CAGE codes, including National Aerospace Standards Committee Aerospace Industries Association Of America Inc Not For Rfq Or Solicitation Use, Military Standards Promulgated By Military Departments Under Authority Of Defense Standardization Manual 4120 3-M, Jednolity Indeks Materialowy - Uniform Material Index; the primary is 5310PL2178597. The unit of issue is EA and the FLIS list price is $10.60.

The U.S. government has bought this item 12 times on record, 1 of them in the last 24 months, most recently on June 26, 2025 at $14.86 each from Boeing Distribution Services, Inc.. The median unit price paid over 36 months is $14.86. 1 solicitation is open right now, the soonest due September 29, 2026 for 376 EA. No seller has confirmed stock of it here in the last 60 days; watching the number is free and the first listing triggers an alert.

3

part numbers from 3 CAGEs

1

open solicitation, all agencies

1

government buy in 24 months · median $14.86

0

sellers with confirmed stock

Watch NSN 5310-01-490-3137: an email the morning the government solicits or buys it, or an AD names it. Free.
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Cross-references

Part numbers filed against this stock number, with the manufacturer (CAGE) and the FLIS reference codes.

Part numberCAGEManufacturerReferenceVariation
MS14183L-C1280205National Aerospace Standards Committee Aerospace Industries Association Of America Inc Not For Rfq Or Solicitation Use3 · Design control (vendor)2 · Fully interchangeable
NASM1418380205National Aerospace Standards Committee Aerospace Industries Association Of America Inc Not For Rfq Or Solicitation Use3 · Design control (vendor)1 · Not fully interchangeable
MS14183L-C1296906Military Standards Promulgated By Military Departments Under Authority Of Defense Standardization Manual 4120 3-M5 · Secondary reference9 · Reference only
5310PL21785979009HJednolity Indeks Materialowy - Uniform Material Index69 · Reference only

Government demand

Open DLA RFQs (DIBBS)

What the government paid

DateVendorQtyUnit costAmountBuyerReference
Jun 26, 2025Boeing Distribution Services, Inc. 2V484422$14.86DlaSPE4A625PX847
Aug 24, 2023Wesco Aircraft Hardware Corp. 1V757269$7.60DlaSPE4A623PY168
Dec 13, 2021Sey Tec, Inc. 0FGC4311$6.05DlaSPE4A622V6972
Apr 20, 2020Boeing Distribution Services, Inc. 2V484247$6.20DlaSPE5E720P2833
Dec 4, 2018Wesco Aircraft Hardware Corp. 1V757182$6.40DlaSPE5E719V1344
Jun 16, 2017Apollo Aerospace Components LLC 0036059$6.99DlaSPE5E717V4395
Jun 16, 2017Wesco Aircraft Hardware Corp. 1V757360$5.45DlaSPE5E717V4391
Apr 1, 2013Wesco Aircraft Hardware Corp. 1V75756$7.29DlaSPM5E713V1305
Nov 15, 2012Boeing Distribution Services X, Inc. 2N93514$7.40DlaSPM5E713V0297
Feb 3, 2011Boeing Distribution Services Defense LLC 3G1W316$7.50DlaSPM5A811V0086
Dec 4, 2008Boeing Distribution Services Defense LLC 3G1W316$7.75DlaSPM5A809V0355
Mar 31, 2006Boeing Distribution Services Defense LLC 3G1W310$5.94DlaSP050003GD0700976

Sources: DLA DIBBS procurement history (unit cost), DLA award history, FPDS (all agencies), SAM.gov notices. 12 buys on record in total.

Sellers with confirmed stock

No seller has confirmed stock on this NSN in the last 60 days. Watch it and we will email you when one does, or request a quote on 5310PL2178597.

Request 5310PL2178597

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Listings appear here only while the seller has confirmed them within 60 days. Sellers: list this part free.

DLA management data

FLIS unit price
$10.60
Unit of issue
EA
Acquisition advice
D — Stocked, centrally managed (DLA)
Source of supply
SMS
Effective
Oct 1, 2025

Item characteristics

Hole Diameter
INCHES MINIMUM 0.078 AND INCHES MAXIMUM 0.793
Outside Diameter
INCHES MINIMUM 1.384 AND INCHES MAXIMUM 1.394
Thickness
INCHES MINIMUM 0.099 AND INCHES MAXIMUM 0.119
Hardness Rating
ROCKWELL C MINIMUM 36.0 OR ROCKWELL C MAXIMUM 45.0
Special Features
RECESS DIAMETER: 0.981 IN. MIN. AND 0.991 IN. MAX.;RECESS ANGLE: 44.0 DEG. MIN. AND 46.0 DEG. MAX.;STYLE DESIGNATOR: SHOULDERED AND RECESSED
Material
OVERALL NICKEL ALLOY 718
Material Document And Classification
OVERALL ASSN STD SINGLE MATERIAL RESPONSE A-S5596 OR ASSN STD SINGLE MATERIAL RESPONSE A-S5597 OR ASSN STD SINGLE MATERIAL RESPONSE A-S5662
Surface Treatment
OVERALL PASSIVATE
Surface Treatment Document And Classification
OVERALL FED SPEC SINGLE TREATMENT RESPONSE QQ--35

Related stock numbers

Other NSNs filed under the same part numbers.

About this page

An NSN is 13 digits: the 4-digit Federal Supply Class and the 9-digit NIIN. Cross-references come from the federal logistics record; demand from DLA DIBBS, SAM.gov and FPDS; ADs from the Federal Register. Refreshed nightly. Market Pulse shows the whole market.

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