Home · FSC 5310 Nuts And Washers · NSN 5310-01-660-6834

NSN 5310-01-660-6834 — Nut,Self-Locking,Knurled

NIIN 01-660-6834 · unit of issue EA · AAC D (stocked, centrally managed (dla)) · source of supply SMS

Used on: F/A-18 Hornet and Super Hornet · all platforms

NSN 5310-01-660-6834 is the national stock number for a nut,self-locking,knurled in federal supply class 5310 (Nuts And Washers). It cross-references to 2 manufacturer part numbers from 2 CAGE codes, including The Boeing Company, Sps Technologies LLC; the primary is 4M373-4A. The federal catalog ties it to the F/A-18 Hornet and Super Hornet. The unit of issue is EA and the FLIS list price is $4,115.25.

The U.S. government has bought this item 4 times on record, 1 of them in the last 24 months, most recently on May 13, 2026 at $850.00 each from Boeing Distribution Services, Inc.. The median unit price paid over 36 months is $1,900.00. 1 solicitation is open right now, the soonest due September 29, 2026 for 39 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.

part numbers from 2 CAGEs

open solicitation, all agencies

government buy in 24 months · median $1,900.00

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
4M373-4A	76301	The Boeing Company	3 · Design control (vendor)	2 · Fully interchangeable
4M373-4A	97393	Sps Technologies LLC	5 · Secondary reference	2 · Fully interchangeable
SL7534-2	97393	Sps Technologies LLC	5 · Secondary reference	2 · Fully interchangeable

Government demand

Open DLA RFQs (DIBBS)

SPE4A626T31LL · 39 EA · due Sep 29, 2026 · Y · AMSC C · DIBBS

What the government paid

Date	Vendor	Qty	Unit cost	Buyer	Reference
May 13, 2026	Boeing Distribution Services, Inc. 2V484	3	$850.00	Dla	SPE4A126V0337
Oct 2, 2023	Don Industrial Group LLC 745V4	3	$2,950.00	Dla	SPE4A624P0498
Oct 15, 2021	Boeing Distribution Services, Inc. 2V484	2	$850.00	Dla	SPE4A122V0050
May 13, 2020	Boeing Distribution Services, Inc. 2V484	6	$800.00	Dla	SPE5E920P1531

Sources: DLA DIBBS procurement history (unit cost), DLA award history, FPDS (all agencies), SAM.gov notices. 4 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 4M373-4A.

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

DLA management data

FLIS unit price: $4,115.25
Unit of issue: EA
Acquisition advice: D — Stocked, centrally managed (DLA)
Source of supply: SMS
Effective: Oct 1, 2025

Item characteristics

Thread Class: 3B
Thread Direction: RIGHT-HAND
Locking Feature: PREVAILING TORQUE WITH METALLIC INSERT
Lubrication: DRY FILM LUBRICANT
Nut Diameter: INCHES MINIMUM 4.290 AND INCHES MAXIMUM 4.310
Nut Thickness: INCHES MINIMUM 0.555 AND INCHES MAXIMUM 0.575
End Item Identification: F/A-18 E/F
Width Across Flats: INCHES MINIMUM 4.120 AND INCHES MAXIMUM 4.140
Thread Series: UNJS
Thread Quantity Per Inch: 28
Nominal Thread Size: INCHES 2.875
Part Name Assigned By Controlling Agency: LOCKNUT AND RETAINER ASSEMBLY
Special Features: ASSEBLY INCLUDES LOCKNUT AND RETAINER
Material: OVERALL STEEL CORROSION RESISTING
Material Document And Classification: OVERALL ASSN STD SINGLE MATERIAL RESPONSE A-S 5659
Surface Treatment: OVERALL PASSIVATE
Surface Treatment Document And Classification: OVERALL ASSN STD SINGLE TREATMENT RESPONSE A-S 2700 OR ASSN STD SINGLE TREATMENT RESPONSE A-S-QQ--35

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.