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Home / Hardware / Nuts / Stop Nuts /MS21042 All-Metal Hex Stop Nuts
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MS21042 All-Metal Hex Stop Nuts

74 Reviews 4 Answered Questions
From $0.36 to $1.24
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Type Part No. Thread Price Buy
Dry Hex Nut
04-04060
4-40$0.45
Quantity
Dry Hex Nut
MS21042-06
6-32$0.57
Quantity
Dry Hex Nut
MS21042-08
8-32$0.40
Quantity
Dry Hex Nut
MS21042-3
10-32$0.36
Quantity
Dry Hex Nut
MS21042-4
1/4-28$0.42
Quantity
Dry Hex Nut
MS21042-5
5/16-24$1.14
Quantity
Dry Hex Nut
MS21042-6
3/8-24$1.12
Quantity
Lubed Hex Nut
MS21042-L04
4-40$0.41
Quantity
Lubed Hex Nut
MS21042-L06
6-32$0.75
Quantity
Lubed Hex Nut
MS21042-L08
8-32$0.42
Quantity
Lubed Hex Nut
MS21042-L3
10-32$0.54
Quantity
Lubed Hex Nut
MS21042-L4
1/4-28$0.59
Quantity
Lubed Hex Nut
MS21042-L5
5/16-24$1.24
Quantity
Lubed Hex Nut
MS21042-L6
3/8-24$1.14
Quantity
Subtotal $0.00
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Overview

The MS21042 all-metal stop nuts are designed for use in high temp installations (up to 450°F). MS21042 nuts are shorter than the AN363 nut but develop the same tensile strength. MS21042 Hex Nuts (Lubed) are the same as MS21042- but have a dry film lube (dark grey).
   
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Reviews

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Robert S Verified Purchase

Nut, Stop MS21042-4
June 29, 2025

Robert S Verified Purchase

Nut, Stop MS21042-5
June 29, 2025

Robert G Verified Purchase

Nut, Stop MS21042-3
April 12, 2025

Fast response and top quality hardware!

Guilbert T Verified Purchase

Nut, Stop MS21042-3
February 17, 2025

Sam C Verified Purchase

Nut, Stop MS21042-3
November 15, 2024

Sam C Verified Purchase

Nut, Stop MS21042-08
November 15, 2024

Sam C Verified Purchase

MS21042-04 4-40 Thread Stop Nut
November 15, 2024

Sam C Verified Purchase

Nut, Stop MS21042-06
November 15, 2024

Sam C Verified Purchase

Nut, Stop MS21042-6
November 15, 2024

My nuts arrived promptly and were well packaged.

Marcus S Verified Purchase

Nut, Stop MS21042-6
September 20, 2024

Q&A

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Please note, Aircraft Spruce ®'s personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce ® assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Is MS21042-06 cad plated steel?

Yes, these are cad plated steel.

Q: What is the equivalent nut in Stainless Steel?

MS21043-4 (our part number 04-01388.)

Q: What is the reason for choosing a dry or lubed version of these Hex Nuts?

It helps prevent corrosion.

Q: Are these MS21042 ALL-METAL HEX STOP NUTS self locking?

Yes.

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