Serrated Lock Ring

NSN: 5365-00-218-4927 | Model: AS51990

A locking device which is serrated on the inside and outside diameters. It may have outer serrations omitted on one or two sides for close edge installation. The inner serrations engage the mating serrations of bolts, inserts, nuts, studs or similar items to be locked in place. The outer serrations broach their way into parent material when driven or pressed into place.

NSN Properties and Flags

NATO Stock Number

5365-00-218-4927

DEMIL

Inside Diameter

Between 0.692 inches and 0.699 inches

Pilot Diameter

0.837 inches

Overall Height

0.176 inches

Overall Outside Diameter

Between 0.906 inches and 0.915 inches

Inner Serration Quantity

Side Outer Serrations Omitted For Close Edge Installation

Two sides

Material

Steel, federal standard 66, aisi/sae 1117

Material

Steel comp 1117

Surface Treatment

Cadmium and chromate

Surface Treatment

Cadmium, qq-p-416, type 2, class 3

Recent Solicitations

Solicitation	Return by Date	Buyer Code	Quantity
SPE4A620T4418	2019-11-07	DLA00	475 EA
SPE4A619T36Z3	2019-07-23	PARFM	290 EA
SPE4A619T34W9	2019-07-18	PARFM	145 EA

Inventory Check

The last inventory check on this NSN was done on 05/10/2024. Due to rapid changes in inventory this may not be the current stock qty.

New: 216
New Surplus: 82

Pricing and Availability

Send us a request for quote using the form below. Our team will contact you with an up to date pricing and availability quote ASAP.

Certified Quality Assurance

ISO 9001:2015 + AS9120B
Counterfeit Parts Prevention
100% Product Inspections
7 Year Record Retention
On Time Delivery
HAZMAT Certified
Worldwide Shipping

NSN 5365-00-218-4927 Datasheet

Supply Class (FSC):

Spacers Shims Rings Bushings

Cross Reference:

AS51990
RLRR56SB11
MS51990-110P
52511-230ADL
MS51990-110P
MS51990
A-A-59558
AA59558-109

Cage Codes:

Society Of Automotive Engineers Inc (CAGE 81343)
Arconic Global Fasteners & Rings, (CAGE 83324)
Airbus Helicopters (ets Demarignane) (CAGE F0210)
Military Standards (CAGE 96906)
Federal Commercial Item Description (CAGE 58536)

Replacements:

5365-00-218-4927 replaces 5365-00-792-6258

Identification:

HMIC

N - Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

PMIC

A - Item does not contain precious metal.

CRITL

- The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Freight Information:

NMFC:

095190 - Hardware, noi sub 9
WCC:

713 - Metal hardware
SHC:

9 - Other or no special handling required (sh)
ADC:

A - Shipment is not a consolidation and does not exceed 84 inches in any dimension.
ACC:

B - Construction materials: includes paint and related materials, prefabricated building, wood products, metal and composition mater
LTL:

Q - 70.0
TCC:

Z - No special type of cargo code applicable

NSN Management Codes:

SOS
Sms
AAC
Z
Quantity per pack
1
Unit of Measure
Ea
Shelf Life
N/A
Classification Control
U
MGMT_CTL
T2200x-
Repariability
This is a nonreparable item. if condemned or economically unserviceable, then dispose at the level authorized replace the item.

Questions & Answers:
What are the historical prices recorded for this stock number?
Historical data shows pricing from $9.64 to $16.07..
Does NSN 5365-00-218-4927 have a shelf life?
No. There is no shelf life applicable for this NSN.
What NATO entities are users of this NSN?
Department Of The Army, Department Of The Air Force, Defense Threat Reduction Agency, Department Of The Navy, Brazil, Canada, New Zealand, France, Germany, United Kingdom, Denmark, and Turkey
What is the NIIN of NSN 5365-00-218-4927?
002184927 or 00-218-4927
Does NSN 5365-00-218-4927 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 5365-00-218-4927?
Solicitation SPE4A620T4418 for qty 475 on 10/31/2019
When was this national stock number assigned to the federal catalog?
May 09, 1973