Home · FSC 5310 Nuts And Washers · NSN 5310-01-398-0344

NSN 5310-01-398-0344 — Washer,Flat

NIIN 01-398-0344 · unit of issue EA · AAC D (stocked, centrally managed (dla)) · source of supply SMS

Buying rhythm

from 8 government buys since 2017

The government has bought this item about every 9 months (loose, gaps vary ±86%). Last buy Sep 16, 2026. The gaps are too uneven to put a window on the next one.

How well this works: for loose items, "next buy about one typical gap after the last, give or take 136 days" caught the actual next buy 37% of the time across 34,631 past buys, against 24% 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.

Used on: A-4 · all platforms

NSN 5310-01-398-0344 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 4 CAGE codes, including National Aerospace Standards Committee Aerospace Industries Association Of America Inc Not For Rfq Or Solicitation Use, Leonardo Spa Helicopters Division - Production Site, Nimikkeistokeskus Ncb Finland; the primary is 10122291. The federal catalog ties it to the A-4. The unit of issue is EA and the FLIS list price is $0.08.

The U.S. government has bought this item 15 times on record, 2 of them in the last 24 months, most recently on September 16, 2026 for $978 from Atf Aerospace, LLC. The median unit price paid over 36 months is $0.06. 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.

part numbers from 4 CAGEs

open solicitations, all agencies

government buys in 24 months · median $0.06

sellers with confirmed stock

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Cross-references

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

Part number	CAGE	Manufacturer	Reference	Variation
NAS1149D0432J	80205	National Aerospace Standards Committee Aerospace Industries Association Of America Inc Not For Rfq Or Solicitation Use	3 · Design control (vendor)	2 · Fully interchangeable
NAS1149D0432J	A0126	Leonardo Spa Helicopters Division - Production Site	5 · Secondary reference	2 · Fully interchangeable
10122291	A486G	Nimikkeistokeskus Ncb Finland	6	9 · Reference only
5310PL0787239	9009H	Jednolity Indeks Materialowy - Uniform Material Index	6	9 · Reference only

Government demand

Nothing open right now. Last government buy Sep 16, 2026. Watch this NSN and we will email you when it is solicited.

What the government paid

Date	Vendor	Qty	Unit cost	Amount	Buyer	Reference
Sep 16, 2026	Atf Aerospace, LLC 13W08			$978	Dla	SPE4A626V373R » Award/Basic Package View
May 22, 2026	Hillpro LLC 7B6F7	1,667	$0.04		Dla	SPE7M126V9352
Mar 27, 2024	Noble Supply & Logistics, LLC 1HEN9	4,698	$0.06		Dla	SPE4A624FB6CC
Mar 27, 2024	Noble Supply & Logistics, LLC 1HEN9	302	$0.06		Dla	SPE4A624FB6CB
Jun 27, 2023	Spec Tech Usa Inc 3LRU1	25,000	$0.03		Dla	SPE4A523V2586
Oct 2, 2019	Boeing Distribution Services X, Inc. 2N935	27,305	$0.02		Dla	SPE5E320V0099
Jan 29, 2019	H C Merchandisers, Inc. 53037	33,720	$0.02		Dla	SPE5EK19P0814
Nov 6, 2017	Boeing Distribution Services Defense LLC 3G1W3	19,246	$0.02		Dla	SPE5E318V0814
Jun 5, 2017	Boeing Distribution Services Defense LLC 3G1W3	38,007	$0.02		Dla	SPE5E317V2428
Apr 10, 2015	Midwest Military Fasteners LLC 6JSD9	43,711	$0.02		Dla	SPE5E715M2092
Jan 28, 2014	Boeing Distribution Services Defense LLC 3G1W3	28,686	$0.02		Dla	SPE5E714V1704
Jun 10, 2013	Spec Tech Usa Inc 3LRU1	975	$0.03		Dla	SPM5E713V2032
Dec 17, 2008	J. T. D. Stamping Co Inc 6R888	49,926	$0.01		Dla	SPM5A809V0409
Jul 25, 2008	Anillo Industries LLC 10630	29,455	$0.02		Dla	SPM4A608MG756
Sep 8, 1999	Questron Aerospace / Fas-Tronics Div. 1CY13	110	$1.00		Dla	SP054099MKZ21

Sources: DLA DIBBS procurement history (unit cost), DLA award history, FPDS (all agencies), SAM.gov notices. 15 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 10122291.

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

DLA management data

FLIS unit price: $0.08
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 0.255 AND INCHES MAXIMUM 0.275
Thickness: INCHES MINIMUM 0.028 AND INCHES MAXIMUM 0.036
Overall Diameter: INCHES MINIMUM 0.495 AND INCHES MAXIMUM 0.520
End Item Identification: A4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE
Material: OVERALL ALUMINUM ALLOY 2024 AND ALUMINUM ALLOY 1230
Material Document And Classification: OVERALL FED SPEC SINGLE MATERIAL RESPONSE QQ-A-250 TO 5
Surface Treatment: OVERALL CHROMATE
Surface Treatment Document And Classification: OVERALL MIL SPEC SINGLE TREATMENT RESPONSE -IL-C-5541
Specification/Standard Data: PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD 80205-NAS1149

Related stock numbers

Other NSNs filed under the same part numbers.

01-605-9632 · Washer,Flat

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.