Home · FSC 5310 Nuts And Washers · NSN 5310-01-643-4227

NSN 5310-01-643-4227 — Nut,Self-Locking,Extended Washer

NIIN 01-643-4227 · unit of issue EA · AAC Z (insurance item) · source of supply SMS

Buying rhythm

from 11 government buys since 2021

The government has bought this item about every 5 months (loose, gaps vary ±91%). Last buy Jun 24, 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: KC-135 Stratotanker · all platforms

NSN 5310-01-643-4227 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 3 CAGE codes, including The Boeing Company, Sps Technologies, LLC, Howmet Global Fastening Systems Inc; the primary is BACN10HR. The federal catalog ties it to the KC-135 Stratotanker. The unit of issue is EA and the FLIS list price is $173.71.

The U.S. government has bought this item 13 times on record, 2 of them in the last 24 months, most recently on June 24, 2026 at $152.45 each from Fdh Aero, LLC. The median unit price paid over 36 months is $69.08. 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 3 CAGEs

0

open solicitations, all agencies

2

government buys in 24 months · median $69.08

0

sellers with confirmed stock

Watch NSN 5310-01-643-4227: an email the morning the government solicits or buys it, or an AD names it. Free.
Know someone who should see this?

Cross-references

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

Part numberCAGEManufacturerReferenceVariation
BACN10HR12CB81205The Boeing Company3 · Design control (vendor)2 · Fully interchangeable
BACN10HR12CB56878Sps Technologies, LLC5 · Secondary reference2 · Fully interchangeable
BACN10HR12CB15653Howmet Global Fastening Systems Inc5 · Secondary reference2 · Fully interchangeable
BACN10HR81205The Boeing CompanyD9 · Reference only

Government demand

Nothing open right now. Last government buy Jun 24, 2026. Watch this NSN and we will email you when it is solicited.

What the government paid

DateVendorQtyUnit costAmountBuyerReference
Jun 24, 2026Fdh Aero, LLC 1BRD527$152.45DlaSPE4A626V222B
Nov 4, 2025Defense Support Services, Inc. 1L3U4796$89.00DlaSPE4A626P4677
Dec 4, 2023Apollo Aerospace Components LLC 00360351$49.16DlaSPE4A624F4023
Oct 13, 2023Apollo Aerospace Components LLC 00360452$49.16DlaSPE4A624F0640
Jun 16, 2023Apollo Aerospace Components LLC 00360502$49.16DlaSPE4A623F218C
Jan 13, 2023Apollo Aerospace Components LLC 00360336$49.16DlaSPE4A623F5578
Apr 15, 2022Apollo Aerospace Components LLC 00360394$44.69DlaSPE4A622F061R
Nov 18, 2021Apollo Aerospace Components LLC 00360488$39.42DlaSPE4A622F3272
Oct 15, 2021Apollo Aerospace Components LLC 003603$39.42DlaSPE4A622F1445
Sep 24, 2021Apollo Aerospace Components LLC 00360306$39.42DlaSPE4A621F536F
Apr 16, 2021Apollo Aerospace Components LLC 0036049$39.42DlaSPE4A621F081R
Apr 16, 2021Apollo Aerospace Components LLC 003604$39.42DlaSPE4A621F081Q
Jan 19, 2021Apollo Aerospace Components LLC 00360488$39.42DlaSPE4A621F5940

Sources: DLA DIBBS procurement history (unit cost), DLA award history, FPDS (all agencies), SAM.gov notices. 13 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 BACN10HR.

Request BACN10HR

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
$173.71
Unit of issue
EA
Acquisition advice
Z — Insurance item
Source of supply
SMS
Effective
Oct 1, 2025

Item characteristics

Thread Class
3B
Thread Direction
RIGHT-HAND
Locking Feature
PREVAILING TORQUE ALL METAL DESIGN
Washer Outside Diameter
INCHES MAXIMUM 1.230
Overall Height
INCHES MAXIMUM 0.900
Washer Thickness
INCHES MINIMUM 0.120
End Item Identification
KC-135 ACFT
Width Across Flats
INCHES MINIMUM 0.928 AND INCHES MAXIMUM 0.940
Thread Series
UNIFIED NATIONAL JOINT FINE (UNJF)
Thread Quantity Per Inch
16
Nominal Thread Size
INCHES 0.750
Part Name Assigned By Controlling Agency
NUT,SELF-LOCKING 12 POINT
Special Features
SOLID FILM LUBRICANT
Material
OVERALL IRON ALLOY 660
Precious Material
SILVER
Proprietary Characteristics
PACS
Surface Treatment
OVERALL SILVER

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.

Get the daily Market Pulse

New DLA RFQs, SAM.gov notices, yesterday's awards and FAA directives, weekday mornings. Free, one click to leave.