The Gear Rack, cataloged under National Stock Number 3020-01-167-0856, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Lockheed Martin Corporation Div Rms. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-167-0856 |
| Primary Part Number | 77C715151P003 |
| Item Name | Gear Rack |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Teeth Quantity | 39 |
| Surface Treatment Document and Classification | MIL-C-13924,CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Nominal Distance From End to First Mounting Hole Center | 0.628 INCHES TRANSVERSELY THROUGH SIDE IN |
| Nominal Distance From End to First Mounting Hole Center | 1.242 INCHES TRANSVERSELY THROUGH BOTTOM IN |
| Pitch Height | 1.0685 INCHES NOMINAL IN |
| Mounting Hole Type and Quantity | 2 PLAIN TRANSVERSELY THROUGH SIDE |
| Mounting Hole Type and Quantity | 8 THREADED TRANSVERSELY THROUGH BOTTOM |
| Mounting Hole Nominal Diameter | 0.296 INCHES TRANSVERSELY THROUGH SIDE IN |
| Teeth Type | SPUR |
| Nominal Overall Length | 24.500 INCHES IN |
| Style Designator | SQUARE OR RECTANGULAR |
| Material Document and Classification | AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Tooth Form | STANDARD |
| Mounting Hole Nominal Thread Size | 0.250 INCHES TRANSVERSELY THROUGH BOTTOM IN |
| Nominal Distance From Mounting Hole Center to Bottom | 0.375 INCHES TRANSVERSELY THROUGH SIDE IN |
| Surface Treatment | OXIDE OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 630 OVERALL |
| Mounting Hole Thread Series Designator | UNF TRANSVERSELY THROUGH BOTTOM |
| Nominal Thickness | 1.210 INCHES IN |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 1.500 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 77C715151P003 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| Reference | Meaning |
|---|---|
| 77C715151 | D/9 Drawing number reference only Lockheed Martin Corporation Div Rms |
NSN 3020-01-167-0856 is a Gear Rack, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-167-0856 has 1 manufacturer part number on file: 77C715151P003 (Lockheed Martin Corporation Div Rms).
2 possible matches (shared part number, not a government interchangeability claim): 3020-01-167-4468, 3020-01-173-1331. Verify interchangeability with system specifications before substitution.
Key specifications for 77C715151P003: Teeth Quantity: 39; Surface Treatment Document and Classification: MIL-C-13924,CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Nominal Distance From End to First Mounting Hole Center: 0.628 INCHES TRANSVERSELY THROUGH SIDE IN; Nominal Distance From End to First Mounting Hole Center: 1.242 INCHES TRANSVERSELY THROUGH BOTTOM IN. 22 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.