Helical Gear P/N 5121815

Specifications

Nominal outside diameter

Inches 8.495

Nominal distance between body face and recessed hub end

First End Inches 0.063

Face nominal width

Inches 1.188

Tooth form

Standard

Bore nominal diameter

Both Ends Inches 1.187

Keyway nominal width

Both Ends Inches 0.252

Tooth direction

Right

Teeth quantity

78

Features provided

Single Helix

Hardness rating

Overall Rockwell C Minimum 26.0 and Rockwell C Maximum 32.0

Nominal distance from bore center to keyway bottom

Both Ends Inches 0.717

Hub nominal diameter

First End Inches 2.187

Material

Overall Steel

Pressure angle

Degrees 16.0000

Helix angle

Degrees 19.0114

Pitch diameter

8.2500 in (nominal)

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

Cross-reference part numbers

5121815 5173322 5176458 5153270

Also referenced as

K-5121815-D

Older, superseded, advisory or drawing numbers the federal catalog associates with this NSN — the ones in an old manual.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 93 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 3020-00-745-7738?
NSN 3020-00-745-7738 (3020007457738) — Helical Gear: SECO Parts has 93 in stock in Augusta, GA, on our own shelf. It is the NATO Stock Number for helical gear in federal supply class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain).

Is NSN 3020-00-745-7738 available?
SECO Parts has 93 in stock in Augusta, GA — order or request a quote below.

How much does NSN 3020-00-745-7738 cost?
The government catalog (FEDLOG) lists NSN 3020-00-745-7738 at $522.32 per each. That is a public reference, not SECO's price: SECO quotes each request, usually the same business day, and surplus parts often quote below or above it.

What does NSN 3020-00-745-7738 fit?
The federal catalog lists NSN 3020-00-745-7738 as used on: Grumman Aerospace A-10 Aircraft.

What part numbers cross-reference to NSN 3020-00-745-7738?
Part numbers that cross-reference this NSN include 5121815, 5173322, 5176458, 5153270. It is also referenced by older, superseded or advisory numbers: K-5121815-D. SECO can quote against any of them.