Self-Locking Extended Washer Nut P/N MS21043-6

Specifications

Nut counterbore depth

Nut Inches Minimum 0.008 and Inches Maximum 0.042

Washer thickness

0.030 in minimum

Thread class

3B

Lubrication

Soluble Lubricant

Overall height

0.267–0.282 in

Nominal thread size

Inches 0.375

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 5731 or Assn STD Single Material Response A-S 5732

Precious material and location

Silver External Surface

Precious material

Silver

Surface treatment

Overall Silver

Width across flats

0.430–0.440 in

Temp rating

Fahrenheit Nominal 800.0

Thread series

Unified National Joint Fine (Unjf)

Thread quantity per inch

24

Washer outside diameter

0.620 in maximum

Counterbore diameter

Nut Inches Minimum 0.375 and Inches Maximum 0.405

Surface treatment document and classification

Overall Fed Spec Single Treatment Response QQ-S-365 or Assn STD Single Treatment Response A-S 2410

Thread direction

Right-Hand

Locking feature

Prevailing Torque All Metal Design

From the federal catalog's item characteristics for this NSN. Confirm critical dimensions against your part or drawing before ordering.

Cross-reference part numbers

MS21043-6 NASM21043 1113-5460-02 T99C624 FN1014-624 LH3858-064 HH1-6 2627596

Also referenced as

NAS1291C6 10121791

Older, superseded, advisory or drawing numbers the federal catalog associates with this NSN — the ones in an old manual. They find the item; confirm the current part number when you order.

Shown for identification only. SECO can quote against any of these numbers.

Logistics data

Source of supply	SMS DLA Land and Maritime, Columbus, Ohio
Acquisition advice code	Z Insurance/numeric stockage objective — held by the government as insurance stock for contingencies, not for routine issue. SECO has 42 on the shelf
Unit of issue	EA each
Demilitarization code	A Demilitarization not required — non-munitions-list item
Controlled inventory code	U Unclassified
Hazardous material indicator	N No hazardous material

Source: public FLIS/PUB LOG cataloging data.

Why buy from SECO

These quantities sit on our own shelves — we are a stocking supplier, not a broker sourcing after you order. Condition-coded stock, formal quotes with NSN/PN on the paperwork, POs and GPC welcome, fast U.S. shipping.

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FAQ

What is NSN 5310-00-881-0943?
NSN 5310-00-881-0943 (5310008810943) — Self-Locking Extended Washer Nut: SECO Parts has 42 in stock in Augusta, GA, on our own shelf. It is the NATO Stock Number for self-locking extended washer nut in federal supply class 5310 (Nuts and Washers).

Is NSN 5310-00-881-0943 available?
SECO Parts has 42 in stock in Augusta, GA — order or request a quote below.

How much does NSN 5310-00-881-0943 cost?
NSN 5310-00-881-0943 is a low-cost part, so SECO quotes it by the line rather than by the piece: there is a $50 minimum per line, and quantity pricing on request — usually answered the same business day.

What does NSN 5310-00-881-0943 fit?
The federal catalog lists NSN 5310-00-881-0943 as used on: Armored Multi-Purpose Vehicle (Ampv).

What part numbers cross-reference to NSN 5310-00-881-0943?
Part numbers that cross-reference this NSN include MS21043-6, NASM21043, 1113-5460-02, T99C624, FN1014-624, LH3858-064, HH1-6, 2627596. It is also referenced by older, superseded or advisory numbers: NAS1291C6, 10121791. SECO can quote against any of them.