Home · FSC 5310 Nuts And Washers · NSN 5310-00-047-2391

NSN 5310-00-047-2391 — Nut,Self-Locking,Slotted,Hexagon

NIIN 00-047-2391 · unit of issue EA · AAC D (stocked, centrally managed (dla)) · source of supply SMS

Buying rhythm

from 7 government buys since 2017

The government has bought this item about every 8 months (loose, gaps vary ±95%). Last buy Sep 17, 2026. The gaps are too uneven to put a window on the next one. 1 solicitation is open right now.

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.

NSN 5310-00-047-2391 is the national stock number for a nut,self-locking,slotted,hexagon in federal supply class 5310 (Nuts And Washers). It cross-references to 3 manufacturer part numbers from 5 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, Leonardo Spa Helicopters Division - Production Site; the primary is 5310PL2206251. The unit of issue is EA and the FLIS list price is $12.17.

The U.S. government has bought this item 18 times on record, 11 of them in the last 24 months, most recently on September 17, 2026 at $50.00 each from Adept Fasteners Inc. The median unit price paid over 36 months is $11.56. 2 solicitations are open right now, the soonest due October 2, 2026 for 2,256 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 5 CAGEs

2

open solicitations, all agencies

11

government buys in 24 months · median $11.56

0

sellers with confirmed stock

Watch NSN 5310-00-047-2391: 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
MS21225-480205National Aerospace Standards Committee Aerospace Industries Association Of America Inc Not For Rfq Or Solicitation Use3 · Design control (vendor)2 · Fully interchangeable
MS21225-496906Military Standards Promulgated By Military Departments Under Authority Of Defense Standardization Manual 4120 3-M5 · Secondary reference9 · Reference only
MS21225-4A0126Leonardo Spa Helicopters Division - Production Site5 · Secondary reference2 · Fully interchangeable
Z7764-472962Harvard Industries Inc5 · Secondary reference9 · Reference only
5310PL22062519009HJednolity Indeks Materialowy - Uniform Material Index69 · Reference only

Government demand

Open DLA RFQs (DIBBS)

Open notices, other agencies (SAM.gov)

  • Defense Logistics Agency · Dla Aviation · NUT,SELF-LOCKING,SLOTT · due Oct 2, 2026 · Combined Synopsis/Solicitation

What the government paid

DateVendorQtyUnit costAmountBuyerReference
Sep 17, 2026Adept Fasteners Inc 1V0G65$50.00DlaSPE4A526V2087
Sep 17, 2026Adept Fasteners Inc 1V0G6$250DlaSPE4A526V2087 » Award/Basic Package View
May 11, 2026Noble Supply & Logistics, LLC 1HEN91,343$11.56DlaSPE4A526FB62X
Apr 23, 2026Noble Supply & Logistics, LLC 1HEN974$11.56DlaSPE4A526FAYLW
Apr 17, 2026Noble Supply & Logistics, LLC 1HEN94$11.56DlaSPE4A526FAWQM
Apr 7, 2026Noble Supply & Logistics, LLC 1HEN910$11.56DlaSPE4A526FASRP
Mar 31, 2026Noble Supply & Logistics, LLC 1HEN91$11.56DlaSPE4A526FARBK
Mar 30, 2026Noble Supply & Logistics, LLC 1HEN96$11.56DlaSPE4A526FAQSY
Mar 25, 2026Noble Supply & Logistics, LLC 1HEN93$11.56DlaSPE4A526FANWH
Mar 20, 2026Noble Supply & Logistics, LLC 1HEN94$11.56DlaSPE4A526FAMAV
Mar 20, 2026Noble Supply & Logistics, LLC 1HEN96$11.56DlaSPE4A526FAMAW
Sep 21, 2022Boeing Distribution Services X, Inc. 2N935207$6.21DlaSPE4A622V680T
Sep 15, 2018Alamo Aircraft, Ltd. 55345308$5.69DlaSPE5EY18F420K
Jun 3, 2018Alamo Aircraft, Ltd. 55345240$5.69DlaSPE5EY18F108A
Jul 23, 2017Alamo Aircraft, Ltd. 55345290$5.67DlaSPM5EY13D05520257
Jan 11, 2017Alamo Aircraft, Ltd. 55345383$5.67DlaSPM5EY13D05520198
Jan 3, 2016Alamo Aircraft, Ltd. 553454$5.62DlaSPM5EY13D05520101
Jan 3, 2016Alamo Aircraft, Ltd. 553451,019$5.62DlaSPM5EY13D05520102

Sources: DLA DIBBS procurement history (unit cost), DLA award history, FPDS (all agencies), SAM.gov notices. 18 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 5310PL2206251.

Request 5310PL2206251

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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
$12.17
Unit of issue
EA
Acquisition advice
D — Stocked, centrally managed (DLA)
Source of supply
SMS
Effective
Jun 1, 2026

Item characteristics

Thread Class
3B
Thread Direction
RIGHT-HAND
Locking Feature
PREVAILING TORQUE ALL METAL DESIGN
Nut Height
INCHES MINIMUM 0.266 AND INCHES MAXIMUM 0.296
Width Across Flats
INCHES MINIMUM 0.430 AND INCHES MAXIMUM 0.439
Temp Rating
FAHRENHEIT NOMINAL 800.0
Thread Series
UNIFIED NATIONAL JOINT FINE (UNJF)
Thread Quantity Per Inch
28
Nominal Thread Size
INCHES 0.250
Bearing Surface Type
WASHER FACED
Material
OVERALL IRON ALLOY 660
Material Document And Classification
OVERALL ASSN STD SINGLE MATERIAL RESPONSE A-S 5525 OR ASSN STD SINGLE MATERIAL RESPONSE A-S 5725 OR ASSN STD SINGLE MATERIAL RESPONSE A-S 5737
Surface Treatment
OVERALL SILVER
Surface Treatment Document And Classification
OVERALL ASSN STD SINGLE TREATMENT RESPONSE A-S 2411

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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