Home · FSC 5310 Nuts And Washers · NSN 5310-01-573-4197

NSN 5310-01-573-4197 — Nut,Self-Locking,Extended Washer

NIIN 01-573-4197 · unit of issue EA · AAC Z (insurance item) · source of supply SMS

Buying rhythm

from 8 government buys since 2017

The government has bought this item about every 13 months (regular, gaps vary ±57%). Last buy Jan 28, 2025. If the rhythm holds, the next one falls between Aug 24, 2025 and Oct 14, 2026: a buy is due about now.

How well this works: for regular items, "next buy about one typical gap after the last, give or take 121 days" caught the actual next buy 42% of the time across 15,552 past buys, against 22% 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 5310-01-573-4197 is the national stock number for a nut,self-locking,extended washer in federal supply class 5310 (Nuts And Washers). It cross-references to 2 manufacturer part numbers from 2 CAGE codes, including Martin-Baker America Inc, Martin-Baker Aircraft Company Limited; the primary is MBCS4416. The unit of issue is EA and the FLIS list price is $11.40.

The U.S. government has bought this item 19 times on record, 2 of them in the last 24 months, most recently on January 28, 2025 at $8.15 each from Integrated Procurement Technologies. The median unit price paid over 36 months is $8.23. A DLA long-term contract solicitation (SPE4A226RX000) names it, with an estimated annual demand of 438. 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.

2

part numbers from 2 CAGEs

0

open solicitations, all agencies

2

government buys in 24 months · median $8.23

0

sellers with confirmed stock

Watch NSN 5310-01-573-4197: 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
P386991Q842Martin-Baker America Inc3 · Design control (vendor)2 · Fully interchangeable
P38699U1604Martin-Baker Aircraft Company Limited5 · Secondary reference9 · Reference only
MBCS44161Q842Martin-Baker America IncD9 · Reference only

Government demand

Long-term contracts and larger buys (DLA RFP / IFB)

  • SPE4A226RX000 · long-term contract, 10 yr · estimated annual demand 438 · closes Oct 30, 2026
  • SPE4A226RX000 · long-term contract, 10 yr · closes Oct 30, 2026

When a stock number goes onto a long-term contract, the spot RFQs for it usually stop for the term; the holder then sources the parts. All open long-term contracts →

What the government paid

DateVendorQtyUnit costAmountBuyerReference
Jan 28, 2025Integrated Procurement Technologies 4K0V2427$8.15DlaSPE4A625V7791
Dec 12, 2024Kampi Components Co Inc 7Z016170$8.23DlaSPE4A625V5051
Feb 21, 2024Kampi Components Co Inc 7Z01664$9.52DlaSPE4A624PF553
Nov 22, 2021Kampi Components Co Inc 7Z0161,026$4.12DlaSPE4A622V5329
Oct 20, 2020Kampi Components Co Inc 7Z016560$6.59DlaSPE5E821V0456
Jun 11, 2019Allied Defense Industries, LLC 0GD25698$6.95DlaSPE5E819V6913
Oct 24, 2018Kampi Components Co Inc 7Z016574$7.71DlaSPE5E819V0722
Feb 8, 2017Kampi Components Co Inc 7Z016545$6.00DlaSPE5E817P1679
Mar 26, 2015Kampi Components Co Inc 7Z016546$6.06DlaSPE5E815V3941
Jul 14, 2014Kampi Components Co Inc 7Z016101$6.74DlaSPE5E814V7113
May 20, 2014Allied Defense Industries, LLC 0GD25423$6.19DlaSPE5E814V5724
Apr 17, 2014Allied Defense Industries, LLC 0GD25145$6.64DlaSPE5E814V4669
Mar 24, 2014Allied Defense Industries, LLC 0GD25112$7.09DlaSPE5E114V1794
Mar 14, 2014Allied Defense Industries, LLC 0GD25100$7.19DlaSPE5E814V3523
Feb 28, 2013Kampi Components Co Inc 7Z016175$9.75DlaSPM5E813M3678
Feb 28, 2013Martin-Baker America Inc 1Q8424$4.42DlaSPM5E013M1147
Nov 28, 2012Kampi Components Co Inc 7Z01614$14.72DlaSPM5E813V0693
Nov 9, 2012Kampi Components Co Inc 7Z01614$14.72DlaSPM5E813V0486
Jul 26, 2012Kampi Components Co Inc 7Z01625$15.44DlaSPM5E812M2598

Sources: DLA DIBBS procurement history (unit cost), DLA award history, FPDS (all agencies), SAM.gov notices. 19 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 MBCS4416.

Request MBCS4416

No account needed. Goes to the sellers who carry this number or its family.

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

DLA management data

FLIS unit price
$11.40
Unit of issue
EA
Acquisition advice
Z — Insurance item
Source of supply
SMS
Effective
Oct 1, 2025

Item characteristics

Thread Direction
RIGHT-HAND
End Item Identification
1520-01-492-6324 HELICOPTER, UTILITY
Thread Series
UNF
Part Name Assigned By Controlling Agency
NAS1805 NUT 12 POINT 5/16" UNF
Material
OVERALL STEEL CORROSION RESISTING
Proprietary Characteristics
PACS

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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